optibelt TECHNICAL MANuAL optibelt DELTA CHAIN Carbon

Transcription

1 optibelt TECHNICAL MANuAL optibelt ELTA CHAIN Carbon

2 optibelt TECHNICAL MANuAL optibelt ELTA CHAIN Carbon The optibelt delta chain carbon sets new standards in the market for high performance timing belts. Endless optibelt delta chain carbon high performance timing belts together with the associated zrs C timing belt pulleys enable slip-free synchronous power transmission of up to several hundred kilowatts. up to 100 % higher power transmission is possible compared to high performance rubber timing belts such as optibelt omega Hp. The particular focus here is on drives with very high torques. In general, the overall width can be considerably reduced for power drives with small and medium centre distances. The innovative combination of materials comprising an extremely resistant polyurethane compound, an abrasion-resistant and specially treated polyamide fabric, as well as a carbon fibre cord, provides the optibelt delta chain carbon with unmatched strength and resistance to a wide range of chemicals, oils and fluids. This means that the optibelt delta chain carbon is suitable for a wide variety of applications, including uses which were previously reserved for roller chains, for example. All relevant information as well as the methods to calculate drives with optibelt delta chain carbon high performance timing belts are included in this manual. They are supplemented by the OPTIbELT product ranges and price lists for belts and pulleys, technical data sheets, the optibelt CAP software for drive design, CA drawings of optibelt zrs C toothed pulleys and additional OPTIbELT documentation, which can be found in their current version on the OPTIbELT website. If you have any further questions, please take advantage of the free service provided by our application engineers. ArNTz OPTIbELT GrOuP, GErMANy 1

3 optibelt EuropE optibelt ASiA optibelt AFricA optibelt AMEricA optibelt AuSTrALiA optibelt s partners can be found in most countries throughout the world optibelt gmbh optibelt Österreich gmbh optibelt Nederland b.v. optibelt Polska sp. z o.o. optibelt gmbh optibelt Hungary kft. optibelt Ag ooo optibelt Power Transmission optibelt (uk) Ltd. optibelt finland oy optibelt france sas optibelt skandinaviska Ab optibelt Ag optibelt Corporation optibelt España, s.a. optibelt (Canada) Inc. optibelt de México optibelt do brasil Ltda. optibelt Power Transmission India Pvt. Ltd. optibelt Australia Pty Ltd. optibelt Philippines optibelt Indonesia OPTIBELT Asia Pacific Pte. Ltd. optibelt Power Transmission (shanghai) Co., Ltd. optibelt Thailand optibelt vietnam optibelt Colombia optibelt güc Aktarma Ekipmanlari san. ve Tic Ltd. sti. 2 ArNTz OPTIbELT GrOuP, GErMANy ArNTz OPTIbELT GrOuP, GErMANy 3

4 TAbLE of CoNTENTs TAbLE of CoNTENTs Introduction...1 Sales Organisation of the Arntz OPTIbELT Group ProuCT EsCrIPTIoN 1.1 Structure Features PowEr ratings 4.1 The optibelt ELTA CHAIN Carbon 8MC The optibelt ELTA CHAIN Carbon 14MC imensions and Tolerances TIMINg belt ProuCT range 2.1 The optibelt ELTA CHAIN Carbon 8MC The optibelt ELTA CHAIN Carbon 14MC EsIgN HINTs 5.1 Timing belt Pulleys / Tension Idlers Installation and Maintenance Problems Causes remedies rive EsIgN 3.1 Formula Symbols Pre-Selection of the Profiles rive Service Factors Additional Factors and Minimum Allowances TooTHE PuLLEys 6.1 Minimum Pulley iameter and esigns imensions and Tolerances Taper bush range Toothed Pulley range Formulae and Calculation Example belt Tension Adjustment by Frequency Measurement general INforMATIoN 7.1 Overview of Standards ata Sheet for Calculation ArNTz OPTIbELT GrOuP, GErMANy ArNTz OPTIbELT GrOuP, GErMANy 5

5 1 ProuCT EsCrIPTIoN 1.1 structure 1 ProuCT EsCrIPTIoN 1.2 features SuiTABLE For BAcK BENd idlers, SMooTH Top SurFAcE reduces running NoiSE of idlers SpEciAL FABric For MiNiMuM wear ANd reduced running NoiSE PowEr TrANsMIssIoN up to 100 % higher power transmission is possible compared to high performance rubber timing belts such as the optibelt omega Hp. The particular focus here is on drives with very high torques. In general, the overall width can be considerably reduced for power drives with small and medium centre distances. carbon cord with unbeatable LoNg-TErM STABiLiTy ANd AN EXcEpTioNAL BrEAK-prooF TENSioN cord in comparative TESTS optimised TooTH ForM For HigH-STrENgTH polyurethane compound resistance To CHEMICALs ue to the materials used, especially the elastomer polyurethane used in this case, the optibelt delta chain carbon exhibits good to very good resistance to oils, greases and a large number of aggressive chemicals when compared to rubber. Verification of the selected drive in tests is generally recommended. Simple swelling tests should be performed in advance. TEETH The teeth and also the top layer are made of high-strength cast polyurethane or thermoset and an extremely wear-resistant fabric. both features give the teeth outstanding shear strength. TEMPErATurE resistance The timing belt withstands temperatures of approx. 30 C to +80 C. Temperatures exceeding this level may result in premature failure of the belt. TooTH-sIE fabric The shear strength of the teeth is enhanced by a strong, coated and well-bonded fabric. Friction between the belt and the pulley is also reduced. This reduces the degree to which the friction partners heat up and minimises the running noise. TooTH ProfILE The curved tooth profile of the optibelt delta chain carbon timing belt ensures that it perfectly meshes and engages with the precisely fitting grooves on the matching optibelt rs dc pulleys. This tooth profile is not compatible with Omega or HT, RPP and ST profiles. Consequently, the use of optibelt delta chain carbon timing belts is only recommended for optibelt rs dc pulleys or CT or PC pulleys with the same profile. These and all other significant curved profiles, particularly including those of the pulleys referred to above, are standardised in ISO TENsIoN Cor In contrast to rubber and polyurethane timing belts e.g. the optibelt ALpHA product groups, a tension cord made of carbon fibres is used. This stands out particularly with its ability to transmit extremely high forces. Carbon cord achieves unmatched length stability and outstanding breakage resistance in comparison to all other tension cords such as those made of glass, steel or aramid. optibelt delta chain carbon timing belts must not be bent otherwise the carbon tension cord will be damaged. EffICIENCy Timing belt drives operate synchronously with positive engagement power transmission, i.e. without speed loss, in contrast to drives with frictional power transmission. espite the high-strength polyurethane, the belt is still fl exible in the bending direction, and the specially developed tooth fabric provides almost frictionless engagement with the teeth, resulting in up to 98 % efficiency. NoIsE EMIssIoNs The optimised tooth shape and the coated, tooth-facing fabric minimise friction and the noise that occurs when the tooth engages with the pulley. Moreover, by reducing the belt width by up to 50 % compared to high performance rubber timing belts, the noise component caused by air displacement is also considerably reduced. This means overall that the relatively hard optibelt delta chain carbon is able to match, or even improve on, the noise level of rubber timing belts, especially compared to much wider standard rubber or polyurethane timing belts. ToP surface The smooth top surface of the belt consists of an abrasion-resistant, thin, and thus bendable polyurethane compound. ue to the smooth top surface as opposed to a grooved structure, a back bend idler can be used without any significant increase in the noise level. Figure 1.2.1: Test bench Figure 1.2.2: reduced width 6 ArNTz OPTIbELT GrOuP, GErMANy ArNTz OPTIbELT GrOuP, GErMANy 7

6 1 ProuCT EsCrIPTIoN 1.3 IMENsIoNs AN ToLErANCEs 1 ProuCT EsCrIPTIoN 1.3 IMENsIoNs AN ToLErANCEs Table 1.3.1: Nominal dimensions and weights per metre Profile Tooth pitch overall height Tooth height Metre weight per mm width t h h t [kg/(m*mm)] 8MC MC LENgTH ToLErANCEs The length tolerances indicated in Table refer to the centre distance. The measuring arrangement is shown in Figure Table 1.3.2: Length Tolerances Timing belt length L w > 786 > 1022 > 1274 > 1526 > 1784 > 2040 > 2288 > 44 > 2800 > 3052 > 3312 < 760 < 1016 < 1272 < 1520 < 1778 < 2032 < 2282 < 36 < 2792 < 3048 < 3304 < 3566* Length tolerance a LTol ± 0.30 ± 0.33 ± 0.36 ± 0.41 ± 0.43 ± 0.46 ± 0.49 ± 0.52 ± 0.54 ± 0.56 ± 0.58 ± 0.60 h t h Figure 1.3.1: Profile C t Table 1.3.4: width tolerance Profile 8MC 14MC width < 12 < 21 < 36 < 62 < 20 < 37 < 68 < 90 < 1 stanariation optibelt delta chain carbon timing belts and optibelt RS C pulleys are standardized in ISO Pitch length L w 840 mm ± 0.4 ± 0.8 ± 0.8 ± 0.8 ± 1.2 ± 0.8 ± 0.8 ± /- 1.6 ± 1.6 ± 2.4 Permissible tolerance of belt width Pitch length L w > 840 mm 1680 mm + 0.4/ /- 1.6 ± 0.8 ± / /- 2.8 Pitch length L w > 1680 mm ± 0.8 ± /- 2.0 ± /- 3.2 * For longer lengths, 0.03 mm have to be added for each increment of 0 mm. Measuring force Q [N] Figure 1.3.2: Arrangement to measure the belt length a Table 1.3.3: Measuring forces to determine the belt length width Profile Measuring force [N] 8MC MC ArNTz OPTIbELT GrOuP, GErMANy ArNTz OPTIbELT GrOuP, GErMANy 9

7 h t h h t h 2 Timing belt product range 2.1 optibelt ELTA CHAIN Carbon 8MC 2 Timing belt product range 2.2 optibelt ELTA CHAIN Carbon 14MC t Profile 8MC t Profile 14MC t 8.0 t 14.0 h 5.9 h 10.2 h t 3.4 h t 6.0 optibelt ELTA CHAIN Carbon 8MC optibelt ELTA CHAIN Carbon 14MC Profile, length Pitch length L w Number of teeth Profile, length Pitch length L w Number of teeth Profile, length Pitch length L w Number of teeth Profile, length Pitch length L w Number of teeth 8MC MC MC MC MC MC MC MC MC MC MC MC MC MC MC Product range of optibelt delta chain Carbon high performance timing belts Profile 14Mc under development Please also refer to the current product range or inquire about other dimensions. Please also refer to the current product range or inquire about other dimensions. Standard widths: 12 mm, 21 mm, 36 mm, 62 mm Intermediate widths on request Standard widths: 20 mm, 37 mm, 68 mm, 90 mm, 1 mm Intermediate widths on request Example order: optibelt ELTA CHAIN Carbon MC = pitch length L w 8MC = profile 21 = width Example order: optibelt ELTA CHAIN Carbon MC = pitch length L w 14MC = profile 37 = width 10 Arntz Optibelt Group, Germany Arntz Optibelt Group, Germany 11

8 3 rive EsIgN 3.1 formula symbols 3 rive EsIgN 3.2 PrE-sELECTIoN of THE ProfILEs Table 3.1.1: Formula symbols formula symbols Explanation unit formula symbols Explanation unit Graph 3.2.1: Pre-selection of profiles 8MC and 14MC See also optibelt CAP drive calculation, software at a rive centre distance a nom rive centre distance, calculated with a standard belt length base drive service factor c 0 n 2 Speed of the driven timing belt pulley [min -1 ] P Power to be transmitted from timing belt drive [kw] P b esign power [kw] c 1 c 2 c 3 c 6 c 7 Tooth meshing factor Total drive service factor Speed ratio correction factor Fatigue allowance Length factor d a Outside diameter of timing belt pulley d w Pitch diameter of timing belt pulley d wg d wk Pitch diameter of large timing belt pulley Pitch diameter of small timing belt pulley d w1 Pitch diameter of driving pulley d w2 Pitch diameter of driven pulley E a Belt defl ection for a given span length F Test force [N] f Frequency [Hz] i Speed ratio L Span length L wst Standard pitch length of the timing belt L wth Calculated pitch length of the timing belt n 1 Speed of the driving pulley [min -1 ] P N rated power [kw] P Ü Power transmitted from a standard belt width [P N c 1 c 7 ] [kw] F a Minimum static shaft loading [N] F n perm Maximum permitted circumferential force [N] F n3 Circumferential force to be effectively transmitted [N] F n Circumferential force to be effectively [N] transmitted incl. actual centrifugal force t Tooth pitch v belt speed (velocity) [m/s] x z e z g z k z r z 1 z 2 Minimum allowance of the drive centre distance a nom for installation of the timing belt Number of meshed teeth of the small driving pulley Number of teeth of the large driving pulley Number of teeth of the small driving pulley Number of teeth of the timing belt Number of teeth of the driving pulley Number of teeth of the driven pulley Speed of small timing belt pulley n k [min -1 ] optibelt ELTA CHAIN Carbon 8MC optibelt ELTA CHAIN Carbon 14MC Speed of small timing belt pulley n k [min -1 ] Figure 3.1.1: Example of a drive geometry: Belts and pulleys esign power P b = P c 2 [kw] 12 ArNTz OPTIbELT GrOuP, GErMANy ArNTz OPTIbELT GrOuP, GErMANy 13

9 3 rive esign 3.3 RIVE SERVICE FACTORS 3 rive esign 3.4 AITIONAL FACTORS and Minimum Allowances Total drive service factor c 2 The total drive service factor c 2 is composed of the base drive service factor c 0 and two further allowances c 3 and c 6. c 2 = c 0 + c 3 + c 6 [ ] c 2 M A, c 2 M Br M N M N [ ] at drive with M A [Nm], M N [Nm] and M Br [Nm] M c 2 Br M N i [ ] at driven side with M N [Nm], M Br [Nm] and i [ ] Base drive service factor c 0 The base drive service factor c 0 takes into account the daily operating time and the type of driver and driven units. As it is not possible to summarise any thinkable combination of driver, driven unit and operating conditions in one table, the base drive service factors are to be considered as guide values. The assignment of the driven unit depends on the type of load that is present in each case. For slowly operating drives with a speed of 100 min -1, a base drive service factor of at least 2 is recommended. The total drive service factor c 2 should also consider a high starting load M A and a high braking load M Br at the drive or a high braking load at the driven side in proportion to the rated load M N of the driving machine. With frequent switching operations and high starting or braking loads, which thus become the main load, while the power transmission itself recedes into the background, an additional safety allowance must be added to the maximum determined quotient. Table 3.3.1: Base drive service factor c c 0 0 Type of base load and examples of a driven machine Load type and examples of driving machines Uniform run Electric motor Fast-moving turbine Piston machine with high number of cylinders Irregular operation Hydraulic motor Slow-moving turbine Piston machine with low number of cylinders Base drive service factor c 0 for daily operating time up to 16 h above 16 h up to 16 h above 16 h Speed ratio correction factor c 3 For the speed step-up ratios, the value that corresponds to the speed ratio is added to the base drive service factor c 0. Table 3.4.1: Speed ratio correction factor Speed ratio i 0.80 < < < < 0.28 Speed ratio correction factor c Table 3.4.4: Tooth meshing factor c 1 Number of meshed teeth Minimum allowance x for tensioning timing belts x = a nom Tooth meshing factor c Light drives, joint-free and uniform running Measuring instruments Film cameras Office equipment Belt conveyors (light goods) Medium drives, temporary operation with small to medium impact loading Mixing machines Food processors Printing machines Textile machines Packaging machines Belt conveyors (heavy goods) Table 3.4.2: Fatigue allowance c 6 rive conditions Use of tension or idler pulleys Operating time h Only rare or occasional operation Fatigue allowance c Table 3.4.5: Minimum allowance y for installation of timing belt pulleys without flange rive centre distances 1000 > > > > Minimum allowance y Heavy drives, operation with medium to strong temporary impact load Machine tools Wood processing machines Eccentric drives Conveying systems (heavy goods) Very heavy drives, operation with strong permanent impact load Mills Calenders Extruders Piston pumps and compressors Lifting gear Table 3.4.3: Length factor c 7 Profile 8MC Profile 14MC Pitch length c 7 Pitch length c > > > > > > > > > > > > > Table 3.4.6: Minimum allowance y for installation of timing belt pulleys with flanges Profile 8MC 14MC Flange on one Flange on both timing belt pulley timing belt pulleys Arntz Optibelt Group, Germany Arntz Optibelt Group, Germany 15

10 3 rive esign 3.5 FORMULAe AN CALCULATION EXAMPLE 3 rive esign 3.5 FORMULAe AN CALCULATION EXAMPLE Prime Mover Electric motor 50 Hz star-delta connection P = 11 kw n 1 = 1450 min -1 Formulas Total drive service factor c 2 = c 0 + c 3 + c 6 c 0 from Table c 3 from Table c 6 from Table esign power P B = P c 2 Timing belt profile from Graph rive Conditions Number of teeth on the timing belt pulleys z 1, d w1 Standard timing belt pulleys, see 6.4 z 2 = z 1 i Please observe minimum diameter! Minimum number of teeth, see Table Operational hours per day: 12 hours Number of starts: Twice per day Environmental influences: Ambient temperature, no influence of oil, water and dust rive centre distance: 400 mm to 450 mm Maximum pulley diameter: 200 mm Calculation Example c 2 = = 1.6 c 0 = 1.6 c 3 = 0 c 6 = 0 P B = = 17.6 kw optibelt ELTA CHAIN Carbon Profile 8MC Recalculation of speed n i = 1 z = 2 = d w i = n 2 z 1 d w1 920 = riven Machine Paper machine n 2 = 920 min -1 ± 2 % Type of load: Constant z 1 = 36 d w1 = mm z 2 = = z 2 = 56 d w2 = 1.60 mm Requirement z 22 minimum number of teeth for profile 8MC met Formulas Pitch length π L wth 2a + (d wg + d wk ) + (d wg d wk ) a L wst see timing belt range in Chapter 2 Nominal drive centre distance a nom = K + K 2 (d wg d wk ) 2 8 Minimum allowance for tensioning x = a nom Minimum allowance for installation y = from Table Number of meshed teeth on the small pulley z e = L wst π K = (d wg + d wk ) 4 8 z k 6 3 ( d wg d wk a nom ) Round down value x 1.66 mm Belt length correction factor c 7 from Table c 7 = 1.0 Calculation Example π ( )2 L wth ( ) L wth mm (selected from Subchapter 2.1) L wst = 1200 mm (1.60 a nom = )2 8 a nom = mm 1200 π K = ( ) = 208 mm 4 8 y = 33 mm Flange on both timing belt pulleys ( 415 ) 36 z e = 3 = z e = 17 Recalculation of speed i = z 2 z 1 n 2 = n 1 i Recommended drive centre distance Recommendation a > 0.5 (d w1 + d w2 ) + 15 mm i = 56 = n 2 = = 932 min Required: 920 min -1 ± 2 % met a > 0.5 ( ) + 15 mm = mm Tooth meshing factor c 1 from Table c 1 = 1.0 Belt width over rated power Required: P Ü P B P Ü = transferable rated power of a standard belt width P Ü = P N c 1 c 7 P N (profile, b) = P N width factor (see Chapter 4) kw > 17.6 kw Requirement met P Ü = = kw P N (8MC, b = 21 mm) = = kw a < 2.0 (d w1 + d w2 ) a < 2.0 ( ) a = 4 mm selected provisionally See also optibelt CAP drive calculation, software at = mm Result: 1 pc. optibelt ELTA CHAIN Carbon timing belt MC 21 1 pc. optibelt RS C timing belt pulley 36 8MC 21 1 pc. optibelt RS C timing belt pulley 56 8MC Arntz Optibelt Group, Germany Arntz Optibelt Group, Germany 17

11 3 rive EsIgN 3.6 belt TENsIoN AJusTMENT by frequency MEAsurEMENT 4 PowEr ratings 4.1 optibelt ELTA CHAIN Carbon profile 8MC TENsIoN for optibelt ELTA CHAIN Carbon TIMINg belt The correct level of belt tension is of crucial importance for trouble-free transmission of power, and for achieving an acceptable belt service life. Often, tension which is either too high or too low results in early timing belt failure. A belt which is over-tensioned sometimes causes bearing failure in the driver or driven unit. Adjustment of the specified static span force, e.g. using the thumbprint method, is not a suitable means of tensioning drives correctly in order to fully exploit them economically. Instead of this, adjustment of the static span force through frequency measurement, e.g. using instruments from the optibelt TT series, is recommended. The default value for the frequency measurement can be determined using the following formulas. ForMuLA SyMBoLS ß [ ] Arc of contact f [Hz] Frequency m k [kg/m] Weight per metre L Span length n k [1/min] Speed of small pulley P N [kw] rated power F T F a F u t F T v z k [N] Static drive centre force [N] Circumferential force Pitch [N] Static span force [m/s] Circumferential speed Number of teeth of small pulley f Table 4.1.1: Rated power for profile 8MC width 12 mm Speed of small timing belt pulley n k [min -1 ] rated power P N [kw] Number of teeth on the small pulley z k Pitch diameter of the small timing belt pulley d wk Further power values for other belt widths can be derived from multiplication with the width correction factors. f Permitted rated circumferential force f N perm with n k 100 min -1 and z k 40 Width F N perm [N] drive centre ForcE, STATic SpAN ForcE, STATic circumferential ForcE FrEQuENcy width correction factor P N sin β 2 F a = 1.4 t z k n k F a F T = sin β 2 F u = P N 1000 V F T 10 6 f = 4 m k L 2 Width Factor ArNTz OPTIbELT GrOuP, GErMANy ArNTz OPTIbELT GrOuP, GErMANy 19

12 4 PowEr ratings 4.2 optibelt ELTA CHAIN Carbon profile 14MC 5 EsIgN HINTs 5.1 TIMINg belt PuLLEys / TENsIoN ILErs Table 4.2.1: Rated power for profile 14MC width 20 mm Speed of small timing belt pulley n k [min -1 ] rated power P N [kw] Number of teeth on the small pulley z k Pitch diameter of the small timing belt pulley d wk flanges To guide OPTIBELT timing belts, timing belt pulleys should be equipped with fl anges on one or both sides. For drive centre distances a > 8 d w, the timing belt pulleys are to be equipped with fl anges on both sides. We recommend the use of standard timing belt pulleys. If this is not possible for design reasons, corresponding special timing belt pulley designs can be used. Small pulley with flanges on both sides Flanges on alternate side Both pulleys with flanges on both sides PowEr values optibelt ELTA CHAIN Carbon ProfILE 14MC MAxIMuM TIMINg belt with The maximum timing belt width should not be larger than the diameter of the smallest timing belt pulley present in the drive. uner EvELoPMENT Further power values for other belt widths can be derived from multiplication with the width correction factors. TENsIoN ILErs Idlers are toothed or fl at faced pulleys that do not transmit power within a drive system. Because they create additional bending stresses within the belt, they should be used according to the following guidelines: iameter of the idlers the smallest permitted pulley according to the profile Width of the idlers the timing belt pulleys present in the drive Always arrange idlers in the empty span Inside idlers: 40 teeth always use timing belt pulley, > 40 teeth fl at faced pulley possible As outside idlers, fl at faced pulleys are to be used in general, as they run on the top surface of the belt Flat faced pulleys must not be of spherical shape The idlers must be attached in such a way that as many teeth as possible are meshed The arc of contact at the idler must be kept as low as possible Minimum span width 2 belt width Permitted rated circumferential force f N perm with n k 100 min -1 and z k 40 Width F N perm [N] width correction factor Width Factor Figure 5.1.1: Arrangement of the inside tension idler Figure 5.1.2: Arrangement of the outside tension idler 20 ArNTz OPTIbELT GrOuP, GErMANy ArNTz OPTIbELT GrOuP, GErMANy 21

13 5 EsIgN HINTs 5.2 INsTALLATIoN AN MAINTENANCE 5 EsIgN HINTs 5.3 ProbLEMs CAusEs remeies safety INforMATIoN Geometrically correct designing and power rating of drives with OPTIbELT timing belts ensures high operating reliability and an optimum lifetime. Practice has shown that premature failure can very often be traced to faulty installation or maintenance. To prevent this, we recommend that you observe the following instructions: Problem Cause remedy Heavy wear on the loaded tooth faces of the belt Excessive wear at base of tooth on belt belt undertensioned Incorrect pulley profile Pitch error Excessive belt tension rive under-dimensioned Faulty timing belt pulleys Correct the tension Check profile and replace, if necessary use wider belts with higher transmission power reduce tension Enlarge timing belts or pulleys replace timing belt pulleys TIMING BELT PULLEYS The teeth must be manufactured according to standard and also be clean. unusual wear on belt edges Improper drive centre parallelism Faulty fl anges Change of drive centre distance re-align the shafts Replace the fl anges reinforce bearing or housing ALIGNMENT Shafts and pulleys should be correctly aligned prior to belt installation. Maximum deviations of shaft parallelism: belt width Angular misalignment ± 1 > 50 ± 0.5 > ± 0. > 100 ± 0.15 correct incorrect TIMING BELT SETS Timing belts which run in pairs or groups on one drive must always be ordered as a set. This guarantees that all belts originate from the same batch and are identical in length. INSTALLATION Prior to installation, the drive centre distance must be reduced to enable the timing belt to be fitted easily. If this is not possible, the timing belt must be installed together with one or both timing belt pulleys. Forcing belts over the pulley fl anges must be avoided as the damage this causes to the high-quality low-stretch tension members is often not visible. If taper bushes are used, the studs used should be checked after an operating time of 0.5 to 1 hour with the aid of a torque spanner. TENSION The tension must correspond to the guidelines in Chapter 3.6. Further inspections after installation are not necessary. TENSION ILERS Tension idlers are to be avoided. If this is not possible, refer to the recommendations in Subchapter 5.1 of this manual. MAINTENANCE OPTIbELT timing belts are maintenance-free if used under normal ambient conditions. If there is clearly visible wear on belts and/or pulleys, they should be replaced; see instructions in Subchapters 5.3 and 6.2. Belt teeth shearing off Excessive lateral belt movement etachment of flanges Overloading Too few teeth in mesh Ambient temperature above 80 C Improper drive centre parallelism Timing belt pulleys are not aligned Impact loading with too high belt tension Timing belt pulleys not in line Very high lateral pressure of the timing belt Incorrect fl ange installation Increase diameter of small pulley or select wider belt use wider belts or larger pulleys For ambient temperature above 80 C re-design with optibelt OMEGA HP EPM 40 C / +140 C re-align the shafts Align the pulleys reduce belt tension re-align the timing belt pulleys re-align the shafts Install fl anges correctly Apparent belt stretch Incorrect storage Correct the belt tension, reinforce and secure bearing support Excessive operating noise Abnormal wear of timing belt pulleys cracks on belt top surface Softening of the belt top surface Incorrect shaft alignment belt tension too high Pulley diameter too small Overloading of timing belt belt width too wide with high speed unsuitable material Incorrect tooth meshing Insufficient surface hardness Ambient temperatures below 30 C Infl uence of incompatible media re-align the shafts reduce the tension Increase pulley diameter Increase belt width or tooth meshing reduce belt width by selecting larger belt types use stronger material replace timing belt pulleys use harder material or harden surface re-design with optibelt OMEGA HP EPM 40 C / +140 C Provide heating for drive unit Shield from the media or use a suitable belt quality 22 ArNTz OPTIbELT GrOuP, GErMANy ArNTz OPTIbELT GrOuP, GErMANy 23

14 6 TooTHE PuLLEys 6.1 MINIMuM PuLLEy IAMETEr AN EsIgNs 6 TooTHE PuLLEys 6.2 IMENsIoNs AN ToLErANCEs o not use less than the recommended minimum number of teeth for pulleys, see Table A pulley diameter that is smaller than the minimum pulley diameter may lead to a reduced operational reliability and an unsatisfactory operating time. Table 6.1.1: Minimum number of teeth and minimum diameter Profile Minimum number of Minimum diameter teeth 8MC MC ob type EB type B type obn type EBN type BN type MATErIALs ExPLANATIoN of THE AbbrEvIATIoNs Steel, grey cast iron, aluminium; OB without fl anges further materials on request EB one fl ange For speeds > 30 m/s, do not use cast pulleys B two fl anges beyond this speed! OBN without fl anges, with hub EBN one fl ange, with hub bores BN two fl anges, with hub All timing belt pulleys are pilot bored. On request they can be finish bored according to IN H7. PErMIssIbLE EvIATIoN of THE TooTH spacings The permissible deviations in the tooth spacing between two consecutive teeth, and of the sum of deviations within a 90 arc, are indicated in the following table. These tolerances represent the spacing between the corresponding points on the right and left surfaces of consecutive teeth. Table 6.2.1: permissible deviation of the tooth spacings Outside diameter d a > > > > > 500 Outside diameter d a > > > > > 500 Permissible deviation of the tooth spacing between two consecutive teeth Sum within a 90 arc Table 6.2.2: permissible deviation of the outside diameter Permissible deviation The optibelt delta chain carbon high performance timing belts feature outstanding longitudinal stiffness due to the tension cord made of carbon fibres. Especially for drives with short drive centre distances or span lengths, and/or large belt widths, a reduction may be required in the permissible deviation specified for the outside diameter and the running tolerances. Tension force fl uctuations and additional loads on bearings, shafts and the belt can be minimised in this way. Table 6.2.3: pulley width Profile Pulley width designation 8MC MC *b f = pulley width between the fl anges NoTE The minimum width b for pulleys without fl anges can be reduced, if the straight running of the drive can be adjusted. However, this must not be below the minimum width indicated for pulleys with fl anges b f. Outside diameter d a Maximum total variation > mm per 10 mm outside diameter > 0 0. mm mm per mm outside diameter above 0.00 mm Outside diameter d a For belt width Table 6.2.4: Side wobble tolerance Table 6.2.5: run-out tolerance Maximum total variation Smallest pulley width with fl anges b f * without fl anges b > mm per 10 mm outside diameter, however not larger than the outside diameter tolerance 24 ArNTz OPTIbELT GrOuP, GErMANy ArNTz OPTIbELT GrOuP, GErMANy

15 6 TOOTHE PULLEYS 6.2 IMENSIONS AN TOLERANCES 6 TOOTHE PULLEYS 6.3 Taper Bush Range optibelt TB taper bushes Table 6.2.6: Static balancing Steel pulleys machined on all sides must not be balanced if the circumferential speed is less than 30 m/s. Grey cast iron pulleys for medium speeds should be statically balanced as follows: Profile Number of teeth Static balancing [N] 8MC 14MC Parallelism The teeth should be parallel to the centre of the bore with a maximum deviation of mm per millimetre of width. Conicity 130 > > Timing belt pulleys that are used for a circumferential speed of more than 30 m/s must be dynamically balanced up to Nm. The conicity must not be higher than mm per millimetre of head width and must not exceed the permissible outside diameter tolerance. Bore diameter d Taper bushes with metric bores and keyways to IN 6885 part 1 Taper bush Material: EN-GJL-200 IN EN Hexagonal socket screws [in] 1 / 4 x 1 / 2 1 / 4 x 1 / 2 3 / 8 x 5 / 8 3 / 8 x 5 / 8 3 / 8 x 5 / 8 3 / 8 x 5 / 8 3 / 8 x 5 / 8 7 / 16 x 7 / 8 1 / 2 x 1 5 / 8 x 1 / 4 5 / 8 x 1 / 4 1 / 2 x 1 / 2 1 / 2 x 1 / 2 5 / 8 x 1 3 / 4 3 / 4 x 2 7 / 8 x 2 1 / 4 Torque [Nm] Bush length Weight at d 2 min [kg] Over 35: Cap head screw with hexagonal socket This bore has shallow keyways. Shallow keyways for taper bushes Bore diameter d 2 Keyway width b Keyway depth t 2 Bore diameter d 2 Keyway width b Keyway depth t Taper bushes with inch bores and keyway to British Standard BS 46 part 1 Taper bush Material: EN-GJL-200 IN EN Bore diameter d 2 [in] 3 /8* 3 /8* 1 /2 5 /8* 1 /2* 1 /2 1 /2 5 /8* 3 /4 1 /4 1 /4 1 /2 1 /2 1 3 /4* 2 1 /4* 3* 1 /2 1 /2 5 /8 3 /4 5 /8* 5 /8 5 /8 3 /4 7 /8 1 3 /8 1 3 /8 1 5 /8 1 5 /8 1 7 /8* 2 3 /8* 3 1 /4* 5 /8 5 /8 3 /4 7 /8 3 /4* 3 /4 3 /4 7 /8 1 1 /2 1 /2 1 3 /4 1 3 /4 2* 2 1 /2* 3 1 /2* 3 /4 3 /4 7 /8 1 7 /8* 7 /8 7 /8* 1 1 /8 1 5 /8 1 5 /8 1 7 /8 1 7 /8 2 1 /8* 2 3 /4* 3 3 /4* 7 /8 7 /8 1 1 /8 1* /8 1 /4 1 3 /4* 1 3 /4* /4* 2 7 /8* 4* /8 1 /4 1 /8 1 /8 1 /8 1 /4 1 3 /8 1 7 /8 1 7 /8 2 1 /8 2 1 /8 2 3 /8* 3* 4 1 /4* 1 /8 * 1 /4 1 /4 1 /4 1 /4 1 3 /8 1 / /4 2 1 /4 2 1 /2* 3 1 /4* 4 1 /2* 1 3 /8 1 3 /8 1 3 /8 1 /2 1 5 /8 2 1 /8* 2 1 /8* 2 3 /8 2 3 /8 2 5 /8* 3 3 /8* 4 3 /4* 1 /2 1 /2 1 5 /8 1 3 /4 2 1 /4 2 1 /4 2 1 /2 2 1 /2 2 3 /4* 3 1 /2* 5 * 1 5 /8 1 5 /8 * 1 3 /4 1 7 /8 2 3 /8 2 3 /8 2 5 /8 2 5 /8 2 7 /8* 3 3 /4* 1 7 / /2 2 1 /2 2 3 /4 2 3 /4 3* 4* /8 2 5 /8 2 5 /8* 2 7 /8 2 7 /8 3 1 /8* 4 1 /4 * 2 1 /4 2 3 /4 2 3 /4* /4* 4 1 /2 * 2 3 /8 2 7 /8 2 7 /8 3 1 /8 3 1 /8 3 3 /8* 2 1 / /4 3 1 /4 3 1 /2* 3 3 /8 3 3 /8 3 3 /4 * 3 1 /2 3 1 /2 4 * Hexagon socket screws [in] 1 / 4 x 1 / 2 1 / 4 x 1 / 2 3 / 8 x 5 / 8 3 / 8 x 5 / 8 3 / 8 x 5 / 8 3 / 8 x 5 / 8 3 / 8 x 5 / 8 7 / 16 x 7 / 8 1 / 2 x 1 5 / 8 x 1 / 4 5 / 8 x 1 / 4 1 / 2 x 1 / 2 1 / 2 x 1 / 2 5 / 8 x 1 3 / 4 3 / 4 x 2 7 / 8 x 2 1 / 4 Torque [Nm] Bush length Weight at d 2 min [kg] Over 35: Cap head screw with hexagonal socket * Non-stock items This bore has a shallow keyway. 26 Arntz Optibelt Group, Germany Arntz Optibelt Group, Germany 27

16 6 TOOTHE PULLEYS 6.4 Toothed pulley range 6 TOOTHE PULLEYS 6.4 Toothed pulley range optibelt RS C toothed pulleys profile 8MC for optibelt TB taper bushes optibelt RS C toothed pulleys profile 8MC for optibelt TB taper bushes B d w b1 a dd b1 da B dd B=b1 da B dd B=b1 da dd B=b1 i da i dd B=b1 da i dd B=b1 da i dd b1 da i dd b1 esignation Number of teeth esign Material d w d a B b 1 B N i N Taper bush Weight of bush approx. [kg] 8MC 21 TB GG B=N B=N N N N N N B=N B=N 8MC 21 TB GG MC 21 TB GG Type 2F Type 2 Type 3F Type 6F Type 6 Type 7 Type 8 Type 9 Type 10 esignation Number of teeth esign Material d w d a B b 1 8MC for belt width 12 8MC 12 TB 2F ST MC 12 TB F ST MC 12 TB F ST MC 12 TB F ST MC 12 TB F ST MC 12 TB F ST MC 12 TB F ST MC 12 TB F ST MC 12 TB F ST MC 12 TB F ST MC 12 TB F ST MC 12 TB F ST MC 12 TB F ST MC 12 TB F ST MC 12 TB GG MC 12 TB GG MC 12 TB GG 229, MC for belt width 21 8MC 21 TB 3F ST MC 21 TB F ST MC 21 TB F ST MC 21 TB F ST MC 21 TB F ST MC 21 TB F ST MC 21 TB F ST MC 21 TB F ST MC 21 TB F ST MC 21 TB F ST MC 21 TB F ST MC 21 TB F ST MC 21 TB F ST MC 21 TB F ST MC 21 TB GG MC 21 TB GG B N i N Taper bush Weight of bush approx. [kg] 8MC for belt width 36 8MC 36 TB F ST MC 36 TB F ST MC 36 TB F ST MC 36 TB F ST MC 36 TB F ST MC 36 TB F ST MC 36 TB F ST MC 36 TB F ST MC 36 TB F ST MC 36 TB F ST MC 36 TB F ST MC 36 TB F ST MC 36 TB F ST MC 36 TB GG MC 36 TB GG MC 36 TB GG 229, MC 36 TB GG MC 36 TB GG MC 36 TB GG MC 36 TB GG MC for belt width 62 8MC 62 TB F ST MC 62 TB F ST MC 62 TB F ST MC 62 TB F ST MC 62 TB F ST MC 62 TB F ST MC 62 TB F ST MC 62 TB GG MC 62 TB GG MC 62 TB GG 229, MC 62 TB GG MC 62 TB GG MC 62 TB GG MC 62 TB GG Taper bush Bore d 2 from... to GG: Grey cast iron ST: Steel We reserve the right to alter specifications without notice. Bore diameter d 2 see Subchapter Arntz Optibelt Group, Germany Arntz Optibelt Group, Germany 29

17 6 TooTHE PuLLEys 6.4 TooTHE PuLLEy range 6 TooTHE PuLLEys 6.4 TooTHE PuLLEy range optibelt rs C toothed pulleys profile 8MC for cylindrical bore optibelt rs C toothed pulleys profile 14MC for optibelt Tb taper bushes b1 d B d w d a B=N Type 1F esignation Number of teeth esign Material d w d a b 8MC for belt width 12 b 1 b s weight approx. [kg] 8MC F ST MC for belt width 21 8MC F ST MC for belt width 36 8MC 36 1F ST MC for belt width 62 8MC F ST MC F ST MC F ST MC F ST MC F ST ST: Steel We reserve the right to alter specifications without notice. range of optibelt rs C TooTHE PuLLEys with ProfILE 14MC uner EvELoPMENT 30 ArNTz OPTIbELT GrOuP, GErMANy ArNTz OPTIbELT GrOuP, GErMANy 31

18 6 TooTHE PuLLEys 6.4 TooTHE PuLLEy range 6 TooTHE PuLLEys 6.4 TooTHE PuLLEy range optibelt rs C toothed pulleys with profile 14MC for optibelt Tb taper bushes optibelt rs C toothed pulleys with profile 14MC for cylindrical bore range of optibelt rs C TooTHE PuLLEys with ProfILE 14MC uner EvELoPMENT range of optibelt rs C TooTHE PuLLEys with ProfILE 14MC uner EvELoPMENT 32 ArNTz OPTIbELT GrOuP, GErMANy ArNTz OPTIbELT GrOuP, GErMANy 33

19 7. General Information 7.1 Overview of Standards 7. General Information 7.2 ata Sheet for Calculation / Checking of timing belt drives Federal Republic of Germany IN 109 Sheet 1 rive Elements; Circumferential Speeds IN 109 Sheet 2 rive Elements; Centre istances for V-Belt rives IN 111 Pulleys for Flat Transmission Belts; imensions, Nominal Torques IN 111 Sheet 2 Pulleys for Flat Transmission Belts; Classification for Electrical Machines IN 2211 Sheet 1 Grooved Pulleys for Narrow V-Belts; imensions, Materials IN 2211 Sheet 2 Grooved Pulleys for Narrow V-Belts; Inspections of Grooves IN 2211 Sheet 3 Grooved Pulleys for Narrow V-Belts; Classification for Electrical Machines IN 2215 Endless V-Belts, Classical Profiles; Minimum atum iameter of the Pulleys, Internal and atum Belt Length IN 2216 Open-Ended V-Belts; imensions IN 2217 Sheet 1 V-Belt Pulleys for Classical Profiles; imensions, Materials IN 2217 Sheet 2 V-Belt Pulleys for Classical Profiles; Inspections of Grooves IN 2218 Endless V-Belts, Classic Profiles for Mechanical Engineering; Calculation of rives, Performance ata IN 7716 rubber Products; Requirements for Storage, Cleaning and Maintenance IN 7719 Part 1 Endless Wide V-Belts for Industrial Speed Changers; Belts and Groove Profiles for Corresponding Pulleys IN 7719 Part 2 Endless Wide V-Belts for Industrial Speed Changers; Measurement of Centre istance Variations IN 7721 Part 1 Synchronous Belt rives, Metric Pitch; Synchronous Belts IN 7721 Part 2 Synchronous Belt rives, Metric Pitch; Tooth Space Profile of Synchronous Pulleys IN 7722 Endless Hexagonal Belts for Agricultural Machines and Groove Profiles of Corresponding Pulleys ln 7753 Part 1 Endless Narrow V-Belts for Mechanical Engineering; imensions IN 7753 Part 2 Endless Narrow V-Belts for Mechanical Engineering; rive Calculation, Performance ata IN 7753 Part 3 Endless Narrow V-Belts for the Automotive Industry; imensions IN 7753 Part 4 Endless Narrow V-Belts for the Automotive Industry; Fatigue Testing IN 7867 V-Ribbed Belts and Pulleys IN/ISO 5290 Grooved Pulleys for Joined Narrow V-Belts; Groove Profiles 9J; 15J; 20J; J IN Articles from Synthetics for Use in Underground Mines, Paragraph 5.4 V-Belts IN EN Fire Hazard Testing ISO lnternational Organization for Standardization ISO 22 Widths of Flat Transmission Belts and Corresponding Pulleys ISO 63 Flat Belt rives; Lengths ISO 99 iameter of the Belt Pulleys for Flat Belts ISO 100 bulging Height of the Belt Pulleys for Flat Belts ISO 155 belt Pulleys; Limiting Values for Adjustment of Centre istances ISO 4 Quality, Finish and Balance of Belt Pulleys ISO 5 Pulleys for Classical V-Belts and Narrow V-Belts; Geometric Testing of Grooves ISO 1081 Vocabulary from V-Belts, V-Ribbed Belts and Pulleys ISO 1604 Endless Speed Changer Belts and Pulleys for Mechanical Engineering ISO 1813 Electrical Conductivity of V-Belts, Kraftbands, V-Ribbed Belts, Wide V-Belts and ouble Profile V-Belts ISO 2230 Please Consult IN 7716 ISO 2790 ISO 3410 ISO 4183 ISO 4184 ISO 56 ISO 5287 ISO 5288 ISO 5289 ISO 5290 ISO 5291 ISO 5292 ISO 5295 ISO ISO ISO/IS 8419 ISO 9010 ISO 9011 ISO 9563 ISO 9980 ISO 9981 ISO 9982 ISO ISO ISO ISO ISO USA Narrow V-Belt rives for the Automotive Industry; imensions Endless Speed Changer Belts and Pulleys for Agricultural Machinery Grooved Pulleys for Classical V-Belts and Narrow V-Belts Classical V-Belts and Narrow V-Belts; Lengths Synchronous Belt rives; Belt Tooth Pitch Code Part 1 MXL; XL; L; H; XH; XXH Part 2 MXL; XXL Metric imensions Narrow V-Belt rives for the Automotive Industry; Fatigue Test Vocabulary from Timing Belt rives Endless ouble Profile V-Belts and Pulleys for Agricultural Machinery Grooved Pulleys for Joined Narrow V-Belts; Profiles: 9J; 15J; 20J; J Grooved Pulleys for Joined Classical V-Belts; Profiles: AJ; BJ; CJ; J Industrial V-Belt rives; Calculations of the Performance ata and Centre istance Timing Belts; Calculations of the Performance ata and Centre istance "Inch Pitch" ynamic Test to etermine Pitch one Location with V-Belts ynamic Test to etermine Pitch one Location with V-Ribbed Belts belt rives; Joined Narrow V-Belts; Lengths in Effective System; 9N/J, 15N/J, N/J Synchronous Belt rives Automotive Belts Synchronous Belt rives Automotive Pulleys Antistatic Endless Synchronous Belts; Electrical Conductibility; Characteristics and Testing Method belt rives; V-Belt Pulleys, Geometric Inspection of Grooves belt rives Pulleys and V-Ribbed Belts for the Automotive Industry; PK Profile belt rives; Pulleys and V-Ribbed Belts for Industrial Requirements; Geometric ata PH, PJ, PK, PL, PM belt rives V-Ribbed Belts for the Automotive Industry, Fatigue Testing Synchronous Belt rives Automotive Belts Physical Characteristics Synchronous Belt rives Metric Pitch, Curvilinear Profile Systems G, H, R and S, Belts and Pulleys Synchronous Belt rives Metric Pitch, Trapezoidal Profile Systems T and AT, Belts and Pulleys Synchronous belt drives -- Imperial pitch trapezoidal profile system -- Belts and pulleys RMA/ARPM IP-20 Classical V-Belts and Sheaves (A; B; C; ; Cross Profiles) RMA/ARPM IP-21 ouble (Hexagonal) Belts (AA; BB; CC; Cross Profiles) RMA/ARPM IP-22 Narrow Multiple V-Belts (3V; 5V; and 8V Cross Profiles) RMA/ARPM IP-23 Single V-Belts (2L; 3L; 4L; and 5L Cross Profiles) RMA/ARPM IP-24 Synchronous Belts (MXL; XL; L; H; XH; and XXH Belt Profiles) RMA/ARPM IP- Variable Speed V-Belts (12 Cross Profiles) RMA/ARPM IP-26 V-Ribbed Belts (PH; PJ; PK; PL; and PM Cross Profiles) RMA/ARPM IP-27 Curvilinear Toothed Synchronous Belts (8M 14M Pitches) ASAE S V-Belt rives for Agricultural Machines SAE J636b V-Belts and Pulleys SAE J637 Automotive V-Belt rives.. For test For pilot production For series production New drive Existing drive Requirement Pieces/year Prime Mover Type (e.g. electric motor, diesel engine 3 cylinders) Size of the starting torque (e.g. MA = 1.8 MN) Type of start (e.g. star delta) aily operating time hours Number of starts per hour per day Change in the direction of rotation per minute per hour Power: P normal kw P maximum kw or max. torque Nm at n 1 min -1 Speed of driver pulley n 1 min -1 Shaft layout: horizontal vertical inclined <) Maximum allowed static shaft loading S a max N Pitch diameter or number of teeth on the pulley: d w1 mm z 1 mm d w1 min mm z 1 min mm d w1 max mm z 1 max mm Maximum pulley face width mm Company: Street address/p.o. Box number: Town or city/post code: Contact person: epartment: Phone: Currently fitted with: ate: riven Machine Type (e. g. lathe, compressor) Start: under load no load Type of load: steady pulsating shock Required power: P normal kw P maximal kw or max. torque Nm at n 2 min -1 riven speed n 2 min -1 n 2 min min -1 n 2 max min -1 Maximum allowed shaft loading S a max N Pitch diameter or number of teeth on the pulley: d w2 mm z 2 mm d w2 min mm z 2 min mm d w2 max mm z 2 max mm Maximum pulley face width mm Speed ratio i i min i max rive centre distance a mm a min mm a max mm Tension/guide idler pulley:_ inside idler in drive slack side outside idler in drive tigth side d w mm pulley moveable (e.g. spring loaded) d a mm flat pulley fixed Operating conditions Ambient temperature C/F minimum C/F max. Influence of oil (e.g. oil mist, drops) water (e.g. spray water) acid (type, concentration, temperature) dust (type) Special drives: e.g. for drives with inside or outside tensioning/idler pulleys, three or more multi-pulley drives or for drives with contra-rotating pulleys drawings are necessary. Please use the other side of this page for these drawings. Fax: pitch length profile width manufacturer 34 Arntz Optibelt Group, Germany Arntz Optibelt Group, Germany 35

20 Notes Notes Owner of any and all copyrights and intellectual property rights as well as other rights of use and exploitation: Arntz OPTIBELT Group, Höxter, Germany. Any use, exploitation, reproduction, and any transfer to third parties by any means shall require the prior written approval of the Arntz OPTIBELT Group, Höxter, Germany. Any infringement will be prosecuted under the copyright act law. The products on offer provided by Optibelt are exclusively oriented towards specialised trade and not towards the consumer. OPTIBELT recommends that its products are to be exclusively used in accordance with the information provided in OPTIBELT documentation. The use of OPTIBELT products in aeroplanes or aviation systems, products and/or applications is not permitted. If in doubt, consult OPTIBELT before using any OPTIBELT products. OPTIBELT does not accept any liability for the use of OPTIBELT products in systems, products and/or applications for which they were not designed and/or manufactured. This is particularly, but not exclusively, the case if OPTIBELT products are to be used outside of any specific agreement with OPTIBELT in circumstances which are unusual or which present a particular risk to health, safety or the environment, or which require a more demanding use. Errors and omissions excepted. OPTIBELT does not accept any liability for the correctness or completeness of the information supplied by OPTIBELT or for the suitability of the information for use by the recipient of the information. OPTIBELT does not therefore, as far as permitted by law, accept liability for damage resulting outside of any specific agreement with OPTIBELT from the use of the information or the assumption that the information is correct and complete. The general terms and conditions of sale of OPTIBELT GmbH, Höxter, Germany, in particular the agreements relating to retention of title, including in their longer and extended form, shall apply exclusively. These terms and conditions can be obtained free of charge by visiting OPTIBELT shall not accept any of the customer's own terms and conditions that are contrary to or deviate from these terms and conditions, even if OPTIBELT does not explicitly object to them or unconditionally renders performance or accepts the performance by the customer irrespective of the customer's conflicting or differing terms of business. Print: Arntz Optibelt Group, Germany Arntz Optibelt Group, Germany 37

21 optibelt gmbh Corveyer Allee Höxter GErMANy T +49 (0) F +49 (0) E info@optibelt.com