On the market there are various types of V-belts, among which, the most 'widespread are: by SIT and shown in this catalogue are suitable to be used

Transcription

1 V-Pulleys

2 SIT V-Pulleys On the market there are various types of V-belts, among which, the most 'wiesprea are: narrow SP-SPA-SPB-SPC (ISO DIN 7753) classic -A-B-C (ISO DIN 2215) American narrow 3V-5V (RA-PTA). The narrow V-pulleys (DIN ISO4183) manufacture by SIT an shown in this catalogue are suitable to be use with all the aforementione types of belts. Note: for bane belts 3V - 5V - 8V use pulleys with RA specifications (ref. pag 100). These pulleys are not stanar an are available only on request. Compatibility table between main V-belts types an SIT V-pulleys. V-belts ISO DIN 7753/1 RA - PTA ISO DIN 2215 SP SPA SPB SPC 3V 5V 8V A B C a x b 9,7 x 8 12,7 x x x 18 9,5 x 8 16 x 13,5 25,5 x x 6 13 x 8 17 x x 14 SIT Pulleys (DIN 2211) V-PEYS PT SP SPA PBT PCT SPB C SP SPA SPB SPC SP SPA SPB SPC * * X * * * * * * * * = COPATIBE X = NOT COPATIBE * Pitch among the grooves of SP pulley is ifferent from the 3V. Similarly, the pitch is also ifferent between SPB an 5V. Pulleys 99

3 SIT V-Pulleys - prouction range PT pulleys - soli hub aterial: cast iron DIN 1691 GG-20/GG25 Finishing: black manganese phosphating process. V-groove pulleys suitable for normal application for use with the following belt types: SP--3V SPA-A SPB-B-5V C PBT pulleys - for mounting taper bushing SER-SIT aterial: cast iron DIN 1691 GG-20/GG25 Finishing: black manganese phosphating process. V-groove pulleys suitable for use with the following belts: SP--3V SPA-A SPB-B-5V SPC-C PCT pulleys - oversize hub for Self ocking nits aterial: cast iron DIN 1691 GG-20/GG25 Finishing: black manganese phosphating process. V-groove pulleys suitable for use with the following belts: SP--3V SPA-A SPB-B-5V SPC-C TOERANCES Tolerance of pitch iameter 50 ± 0,4 56 ± 0,4 63 ± 0,5 71 ± 0,6 80 ± 0,6 90 ± 0,7 100 ± 0,8 112 ± 0,9 118 ± 1,0 125 ± 1,0 135 ± 1,0 140 ± 1,1 150 ± 1,2 160 ± 1,3 180 ± 1,4 190 ± 1,5 200 ± 1,6 212 ± 1,7 224 ± 1,8 236 ± 1,9 250 ± 2,0 280 ± 2,2 300 ± 2,4 315 ± 2,5 355 ± 2,8 400 ± 3,2 450 ± 3,6 500 ± 4,0 560 ± 4,5 630 ± 5,0 710 ± 5,7 800 ± 6,4 900 ± 7, ± 8, ± 9, ± 10,0 Eccentricity tolerance relevant to the outsie iameter 0,2 0,3 0,4 0,5 0,6 0,8 1,0 Features Our pulleys can be use for application with a spee up to 35 m/s. The pulley imensions are very accurate as they are manufacture only by means of CNC or automatic lathes. For higher spee is strongly recommene to use steel as material of construction. ax. ifference among the pitch iameter of the grooves of the same pulley SP - SPA - SPB SPC 0,4 0,6 Balancing Our PBT pulleys are statically balance accoring to ISO. The PT pulleys are not balance, as they o not have a finishe bores. Note Due to a constant improvement of our proucts, technical ata of the pulleys may be subject to changes. 100 Pulleys an components

4 Dimension of grooves (DIN 2211) Section SP SPA SPB C/SPC b w 8,5 11,0 14,0 19,0 b 1 (±0,2) 9,7 12,7 16,3 22,0 c 2,0 2,8 3,5 4,8 e 12 ± 0,3 15 ± 0,3 19 ± 0,4 25,5 ± 0,5 f 8 ± 0,6 10 ± 0,6 12,5 ± 0,8 17±1 +0,6 +0,6 +0,6 t min ,8 17,5 0 C: 20 SPC: 23,8 0 α 34 per α 38 per >80 >118 >190 >315 Tolerance ± 1 ± 1 ± 1 ± 1 = , Crown with for number ,5 of grooves , , ,5 0 +0,6 0 V-PEYS Dimension of grooves of V-Pulleys suitable for bane belts (RA) α bg b Rb a t f α f f e b1 bw c e External iameter Pitch iameter Sg Se hg Section 3V 5V 8V D α [ ] bg hg min. a Rb min. b Sg ± 0,25 8,89 ± 0,13 8,63 0,63 4,6 8,73 ± 0,01 10,3 ± 0, ± 0,25 8,89 ± 0,13 8,63 0,63 4,6 8,73 ± 0,01 10,3 ± 0, ± 0,25 8,89 ± 0,13 8,63 0,63 4,7 8,73 ± 0,01 10,3 ± 0,4 9 > ± 0,25 8,89 ± 0,13 8,63 0,63 4,8 8,73 ± 0,01 10,3 ± 0, ± 0,25 15,24 ± 0,13 14,98 1,27 8,4 15,08 ± 0,01 17,5 ± 0, ± 0,25 15,24 ± 0,13 14,98 1,27 8,4 15,08 ± 0,01 17,5 ± 0,4 13 > ± 0,25 15,24 ± 0,13 14,98 1,27 8,5 15,08 ± 0,01 17,5 ± 0, ± 0,25 25,4 ± 0,13 25,14 2,54 14,6 25,4 ± 0,01 28,6 ± 0, ± 0,25 25,4 ± 0,13 25,14 2,54 14,7 25,4 ± 0,01 28,6 ± 0,4 19 > ± 0,25 25,4 ± 0,13 25,14 2,54 14,9 25,4 ± 0,01 28,6 ± 0,4 19 Se Pulleys an components 101

5 Dimensions of V-Pulleys PT - soli hub PT SP--3V» PT SP--3V Pitch of grooves z * * * * ** ** ** ** * Note: the iameter at the bottom of the groove is 32 mm ** Note: the iameter at the bottom of the groove is 38 mm Pitch of grooves z A A A A A Part PT 100 SP 2 V-Pulley - soli hub Pitch iameter Section of grooves 1 5 5A (with lightening bores) 4 4A (with lightening bores) 8 (3 spokes) 8A (6 spokes) 9 9A (3 spokes) 9B (6 spokes) 102 Pulleys an components

6 Dimensions of V-Pulleys PT - soli hub PT SPA-A» PT SPA-A Pitch of grooves z * * * ** ** ** Pitch of grooves z A (with lightening bores) 5 5A (with lightening bores) 8 (3 spokes) 8A (6 spokes) 9 9A (3 spokes) 9B (6 spokes) V-PEYS V-PEYS - PT - PT * Note: the iameter at the bottom of the groove is 32 mm ** Note: the iameter at the bottom of the groove is 34 mm Pulleys an components 103

7 Dimensions of V-Pulleys PT - soli hub» PT SPA-A Pitch of grooves z A A A A A A A A A A A A A A A A A A A A A A A (3 spokes) 8A (6 spokes) 9A (3 spokes) 104 Pulleys an components

8 Dimensions of V-Pulleys PT - soli hub PT SPB-B-5V» PT SPB-B-5V Pitch of grooves z Pitch of grooves z * * ** ** ** V-PEYS V-PEYS - PT - PT * Note: the iameter at the bottom of the groove is 32 mm ** Note: the iameter at the bottom of the groove is 43 mm Pulleys an components 105

9 Dimensions of V-Pulleys PT - soli hub» PT SPB-B-5V Pitch of grooves z A A A A A A A A A A A A A A A A A A A A A A A Pitch of grooves z A A A A A A A A A A A A A A A (3 spokes) 8A (6 spokes) 9A (3 spokes) 4A (with lightening bores) 106 Pulleys an components

10 Dimensions of V-Pulleys PT - soli hub PT C» PT C Pitch of grooves z Pitch of grooves z , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , V-PEYS - PT Pulleys an components 107

11 Dimensions of V-Pulleys PBT - mounting taper bushing SER-SIT PBT SP--3V of grooves SER-SIT Taper bushing min-max Part PBT 100 SP 2 V-Pulley - mounting taper bushing Pitch iameter Section of grooves Pulleys an components

12 Dimensions of V-Pulleys PBT - mounting taper bushing SER-SIT» PBT SP--3V of grooves SER-SIT Taper bushing min-max to exhaustion , , , , V-PEYS - PBT Pulleys an components 109

13 Dimensions of V-Pulleys PBT - mounting taper bushing SER-SIT» PBT SP--3V of grooves SER-SIT Taper bushing min-max to exhaustion , , , , , , , , , , , , , , , , , , , , , , , , , Pulleys an components

14 Dimensions of V-Pulleys PBT - mounting taper bushing SER-SIT PBT SPA-A of grooves SER-SIT Taper bushing min-max , , , V-PEYS - PBT Pulleys an components 111

15 Dimensions of V-Pulleys PBT - mounting taper bushing SER-SIT» PBT SPA-A of grooves SER-SIT Taper bushing min-max to exhaustion , , , , , , , , , , , , , , , , Pulleys an components

16 Dimensions of V-Pulleys PBT - mounting taper bushing SER-SIT» PBT SPA-A of grooves SER-SIT Taper bushing min-max to exhaustion , , , , , , , , , V-PEYS - PBT Pulleys an components 113

17 Dimensions of V-Pulleys PBT - mounting taper bushing SER-SIT PBT SPB-B-5V of grooves SER-SIT Taper bushing min-max to exhaustion , , , , , , , , , * , , , , , , * = PBT170SPB8 - taper bush type 3020 up to sol out. 114 Pulleys an components

18 Dimensions of V-Pulleys PBT - mounting taper bushing SER-SIT» PBT SPB-B-5V of grooves SER-SIT Taper bushing min-max to exhaustion , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , V-PEYS - PBT 12 Pulleys an components 115

19 Dimensions of V-Pulleys PBT - mounting taper bushing SER-SIT» PBT SPB-B-5V of grooves SER-SIT Taper bushing min-max to exhaustion , , , , , , , , , , , , , , , , Pulleys an components

20 Dimensions of V-Pulleys PBT - mounting taper bushing SER-SIT PBT SPC-C of grooves SER-SIT Taper bushing min-max to exhaustion , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , V-PEYS - PBT Pulleys an components 117

21 Dimensions of V-Pulleys PBT - mounting taper bushing SER-SIT» PBT SPC-C of grooves SER-SIT Taper bushing min-max to exhaustion , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Pulleys an components

22 Dimension of V-Pulleys PCT - oversize hub for Self ocking nits V-Pulleys with oversize hub are esigne to be in stalle using Self ocking Device type SIT-OCK CA 8. Bore tolerances is H8. PCT SPA of grooves min-max , , ,0 V-PEYS - PCT PCT SPB 2 of grooves min-max , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,0 Pulleys an components 119

23 SIT-OCK 8 - Self-Centering - Special Outsie Diameters ocking assembly with single taper esign. The flange esign prevents axial movement uring installation. SIT-OCK 8 has a very small axial imension, is self centering an has been esigne to suit various shaft iameters although the overall imensions are the same. SIT-OCK 8 is recommene for applications with meium torques which nee a goo axial positioning. The limite number of screws make the installation fast. Ø Ø Ø SIT-OCK 8 Dimensions Performances Pressure [N/mm 2 ] Clamping screws (DIN ,9) x D H H0 H1 H2 D1 T [Nm] Fax [kn] p w p n N 14 x x x x x x x x x x x x x x x x x x x x x x x x x x x x Notes: Dimensions representing the total length of the hub are inicative; they are calculate accoring to the geometric rules. For assemblies requiring larger imensions, contact our Technical Department. s [Nm] S Screw tightening torque Nm T Transmissible torque moment Nm F ax Transmissible axial loa N p w Shaft pressure N/mm 2 p n Hub pressure N/mm Pulleys an components

24 Ajustable Pulleys

25 SIT Ajustable pulleys PR DV an PBR DV Static ajustable pulleys PR DV an PBR DV are esigne to allow ajustment of pitch iameters. One flange is screwe on the threae hub. The movable flange is provie with set screws for fixing into the require position. It is recommene to perioically grease the hub threas. They are suitable for -SP-3V; A-SPA; B-SPB-5V; C-SPC section V-belts. For the power rating, please see our V-belt catalogue, taking care about the minimum allowable iameter for the selecte belt section an type. PR DV pulleys - soli hub aterial: cast iron Finishing: black manganese phosphating process. V-groove pulleys suitable for normal application for use with the following belt types: 1DV 2DV PBR DV pulleys - for mounting taper bushing SER-SIT aterial: cast iron Finishing: black manganese phosphating process. V-groove pulleys suitable for normal application for use with the following belt types: 1DV 2DV V-PEYS V-PEYS - PR DV / PBR DV Note Due to a constant improvement of our proucts, technical ata of the pulleys may be subject to changes. Pulleys an components 123

26 Dimensions of ajustable pulleys PR DV - soli hub PR 1DV Part PR 1DV 121 PR: Ajustable pulleys soli hub of grooves (1 groove) External iameter Coe De Dp max Dp min Belt SP Belt SPA Belt SPB G1 G2 Dp Dp G1 G2 Dp Dp Variation Variation Variation max min max min range range range PR1DV , ,4 53,4 40 1,34 12,5 14, PR1DV , ,4 67,4 54 1,25 15,5 17, ,1 16,8 17,7 PR1DV ,5 71,5 56 1,27 16,5 18,9 77,4 58 1, ,19 18,3 20,2 PR1DV ,5 83,5 68 1,23 16,5 18,9 89,4 70 1, ,16 18,3 20,2 PR1DV ,5 1, ,4 99,4 77 1, , ,5 1,19 18,3 20,7 PR1DV ,5 1, ,4 115,4 93 1, , ,5 1,16 18,3 20,7 PR1DV ,5 1, ,4 130, , , ,5 1,14 18,3 20,7 PR1DV ,5 1, ,4 146, , , ,5 1,12 18,3 20,7 PR1DV ,5 1, ,4 161, , , ,5 1,11 18,3 20,7 PR1DV ,5 206,5 184,5 1, , , ,5 1,09 25,0 28,2 G1 G2 PR 2DV Coe De Dp max Dp min Belt SP Belt SPA Belt SPB G1 G2 Dp Dp G1 G2 Dp Dp Variation Variation Variation max min max min range range range PR2DV ,5 1, ,6 99,4 77 1, , ,5 1, ,6 PR2DV ,5 1, ,6 115,4 93 1, , ,5 1, ,6 PR2DV ,5 1, ,6 130, , , ,5 1, ,6 PR2DV ,5 1, ,6 146, , , ,5 1, ,6 PR2DV ,5 1, ,6 161, , , ,5 1, ,6 PR2DV ,5 184,5 1,12 34,5 32, ,12 34,5 31, ,5 1,09 34,5 31,3 G1 G2 124 Pulleys an components

27 Dimension of pulleys PBR DV - mounting taper bushing SER-SIT PBR 1DV Coe De SER-SIT Taper bushing Dp max Dp min Part PBR 2DV 121 PBR: Ajustable pulleys hub for taper bush of grooves (2 grooves) External iameter Belt SP Belt SPA Belt SPB G1 G2 Dp Dp G1 G2 Dp Dp Variation Variation Variation max min max min range range range PBR1DV , (25.20) 83,5 68 1,23 9,5 11,9 89,4 70 1, ,16 11,3 13,2 PBR1DV (28.20) 90 74,5 1, ,4 99,4 77 1, , ,5 1,19 11,3 13,7 PBR1DV (28.20) ,5 1, ,4 115,4 93 1, , ,5 1,16 11,3 13,7 PBR1DV (30.25) ,5 1, ,4 130, , , ,5 1,14 11,3 13,7 PBR1DV (40.25) ,5 1, ,4 146, , , ,5 1,12 11,3 13,7 PBR1DV (40.25) ,5 1, ,4 161, , , ,5 1,11 11,3 13,7 PBR1DV , (50.30) 206,5 184,5 1, , , ,5 1, ,2 G1 G2 V-PEYS V-PEYS - PR DV / PBR DV PBR 2DV Coe De B SER-SIT Taper bushing Dp max Dp min Belt SP Belt SPA Belt SPB G1 G2 Dp Dp G1 G2 Dp Dp Variation Variation Variation max min max min range range range PBR2DV (28.20) 90 74,5 1, ,6 99,4 77 1, , ,5 1, ,6 PBR2DV (30.40) ,5 1, ,6 115,4 93 1, , ,5 1, ,6 PBR2DV (30.40) ,5 1, ,6 130, , , ,5 1, ,6 PBR2DV (40.40) ,5 1, ,6 146, , , ,5 1, ,6 PBR2DV (40.40) ,5 1, ,6 161, , , ,5 1, ,6 PBR2DV , (65.45) 206,5 184,5 1,12 34,5 32, ,12 34,5 31, ,5 1,09 34,5 31,3 G1 G2 Pulleys an components 125

28 Variable Spee Pulleys

29 SIT Variable spee pulleys VAR Description - VAR Pulleys The variable spee pulley is a well establishe rive; esigne to give continuous spee variation at a comparative low cost. nfortunately it is well known that this esign is subject to excsive flange wear ue to the type of rive systems employe. The hub is mae from inuction harene steel, har chrome plate an groun to give uninterrupte slie fit with flanges. Keys are not use with this application. oving flanges give a wie contact area therefore eliminating uneven belt pressure. The pulley flanges are couple by means of nylon sleeve couplings to the outsie of the flanges an by two flates machine on each en of the pulley hub. Two springs situate insie the nylon coupling give the esire pressure. There is provision for re-greasing the pulley slieways, although the grease chambers are pre-packe before leaving the factory. Part PV 160 VAR 22 Variable pulley External iameter VAR Finishe bore iameter 750 [rpm] 1000 [rpm] Power 1500 [rpm] 3000 [rpm] Belt a x b De ax Dp Dw in p (1) Hub an bores (2) Finishe bores (3) Variation range VAR 100 0,25 0,33 0, x ,61 0,90 VAR 130 0,37 0,50 0,75 1,5 22 x ,73 1,69 VAR 160 0,75 1,0 1, x ,58 3,25 VAR 190 1,75 2,30 3, x ,83 4,85 VAR 240 2,75 3,65 5,50-46 x ,22 8,60 VAR 300 5,00 6,60 10,0-54 x ,21 15,00 eight [Kg] VARIABE PEYS - PV (1) Diameter steel hubs (2) Diameter pilot hole tolerance H11 (3) Diameter bore holes H7 with keyway NI Installation instructions 1 otor shaft 2 Key 3 Aluminium seal washer 4 Pulley shaft 5 Stop ring 6 Toothe bushing 7 OR packing 8 Spring 9 Flange 10 S/23 resin sleeve 11 OR packing 12 Steel washer 13 ubrification grease 14 Aluminium seal washer 15 Screw operations 1 Take off the key (2) from the motor shaft (1) 2 Assemble the aluminium seal washer (1) on the motor shaft (3) 3 Reassemble the key (2) on the motor shaft (1) 4 Assemble the pulley 5 6 ock the pulley on the motor shaft (1) by means of the screw (15) not forgetting to insert the aluminium seal washer (14) IPORTANT Flill up the grease chamber with the lubrification grease (13). Thick grease in preferre. Pulleys an components 129

30 SIT Variable spee pulleys FIXED Description - FIXED Pulleys Fixe riven pulley have been specifically esigne to be use with VAR pulleys. They are manufacture in grey cast iron (GG20 - GG25) an are treate with a black manganese phosphating process. Part PF 160/46 Fixe pulley External iameter / Groove with FIXED 100 FIXED 130 FIXED 160 FIXED 190 FIXED 240 FIXED h I Diameter p Hub iameter m h α I m p 130 Pulleys an components

31 Spee range an center istance for VAR an fixe pulleys assemblies VAR 100 Pitch length Spee range in rpm of riven pulley with rive VAR pulley (rpm) Spee range - center istances Belts insie length in mm in. ax. in. ax. in. ax. in. ax. Center istances in mm calculate with belts 13X Pitch length Spee range in rpm of riven pulley with rive VAR pulley (rpm) Spee range - center istances Belts insie length in mm in. ax. in. ax. in. ax. in. ax. Center istances in mm calculate with belts 22x8 VAR VARIABE PEYS - PV Pulleys an components 131

32 VAR 160 Pitch length Spee range in rpm of riven pulley with rive VAR pulley (rpm) Spee range - center istances Belts insie length in mm in. ax. in. ax. in. ax. in. ax. Center istances in mm calculate with belts 28x i VAR 190 Pitch length Spee range in rpm of riven pulley with rive VAR pulley (rpm) Spee range - center istances Belts insie length in mm in. ax. in. ax. in. ax. in. ax. Center istances in mm calculate with belts 36x Pulleys an components

33 VAR 240 Pitch length Spee range in rpm of riven pulley with rive VAR pulley (rpm) Spee range - center istances Belts insie length in mm in. ax. in. ax. in. ax. Center istances in mm calculate with belts 46x Pitch length Spee range in rpm of riven pulley with rive VAR pulley (rpm) Spee range - center istances Belts insie length in mm in. ax. in. ax. in. ax. Center istances in mm calculate with belts 54x16 VAR VARIABE PEYS - PV Pulleys an components 133

34 Components

35 SIT Taper bushing SER-SIT Description SER-SIT taper lock bush is esigne to give the following: perfect assembly rapi ismounting of the pulley an other transmission equipment no special tools requirementexcept hexagonal key. The large range of available finishe bores ensures that an immeiate assembly can be mae thus avoiing costly factory owntime. The bushes are machine with keyways in accorance with NI an DIN specifications. This is in aition to clamping screws which, in many cases, are sufficient to meet the require torque. Fastening by SER-SIT bushes allows the removal of any clearance between hub an bore so that fretting corrosion is positively eliminate. SER-SIT bushes are interchangeable with all similar types sol throughout the worl. Keyway NI / DIN 6885 Reuce keyway to be consiere only for cases shown in the below table. Diameter of the bore b t 2 Diameter of the bore [pitches] b [pitches] t 2 [pitches] Diameter of the bore Taper Bushing SER-SIT type b t ,4 1,8 2,3 2,8 3,3 3,3 3,3 3,8 4,3 4,4 4,9 5,4 5,4 6,4 7,4 3/8-1/2 9/16-3/4 13/ /16-1-1/4 1-5/16 1-5/8-1-3/4 1-7/ /8-2-1/2 2-5/ /8-3-1/2 3-3/ /4 5 1/8 3/16 1/4 5/16 3/8 7/16 1/2 5/8 3/4 7/ /4 1/16 3/32 1/8 1/8 1/8 5/32 5/32 7/32 1/4 5/16 3/8 7/ Diameter of the bore [pitches] 1 1-1/8 1-5/8-1-3/4 3-1/2 3-3/ Taper Bushing SER-SIT type b [pitches] 1/4 5/16 7/16 7/8 1 1,3 1,3 1,3 2,2 3,3 t 2 [pitches] 1/16 5/64 1/8 1/4 1/4 TAPER BSHING Pulleys an components 149

36 Technical features of taper bushings SER-SIT Part BC 4025 F20 Taper bushing SER-SIT Size Bore iameter Taper Bushing SER-SIT size 1008 (25.20) 1108 (28.20) 1210 (30.25) 1215 (30.40) 1310 (35.25) 1610 (40.25) 1615 (40.40) 2012 (50.30) 2517 (65.45) 3020 (75.50) 3030 (75.75) 3535 (90.90) 4040 ( ) 4545 ( ) 5050 ( ) 6050** ( ) mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches Diameter of the bore * 25* 3/8 1/2 5/8 3/4 7/8 1* * 3/8 1/2 5/8 3/4 7/8 1 11/8* /2 5/8 3/4 7/8 1 11/8 11/ /2 5/8 3/4 7/8 1 11/8 11/ * 1/2 5/8 3/4 7/8 1 11/8 11/4 13/ /8 1/2 5/8 3/4 7/8 1 11/8 11/4 13/8 11/2 15/ * 1/2 5/8 3/4 7/8 1 11/8 11/4 13/8 11/2 15/8* 13/4* /8 3/4 7/8 1 11/8 11/4 13/8 11/2 15/8 13/4 17/ * 3/4 7/8 1 11/8 11/4 13/8 11/2 15/8 13/4 17/8 2 21/8 21/4 2 3/8 21/ /4 13/8 11/2 15/8 13/4 17/8 2 21/8 21/4 2 3/8 21/2 2 5/8 23/4 2 7/ /4 13/8 11/2 15/8 13/4 17/8 2 21/8 21/4 2 3/8 21/2 2 5/8 23/4 2 7/ /2 15/8 13/4 17/8 2 21/8 21/4 2 3/8 21/2 2 5/8 23/4 2 7/8 3 31/8 31/4 3 3/8 31/2* /4 2 23/4 31/2 3 3/4* 4* / /2 4 D screws N ithworth ength Key s [Nm] 22, / ,5 22, / ,5 25, / , / , / , / , / , / , / , / , / , / , / , / , / , / Taper bushing having bore iameters in bol type are mae in steel instea of cast iron s = screw tightening torque * = reuce keyway ** = hexagonal hea screw Assembly an isassembling of SER-SIT conical bushing Before fitting the bushing into the pulley, carefully clean the bore an the conical parts. Fit the bushing into the pulley taking care that the threae half holes of the pulley are in coincience of the unthreae holes of the bushing. Han tighten the screws. Fit the pulley to the shaft after having carefully cleane it. Position it an tighten the screws alternately. Disassembly: remove screws an put a new one in the jacking hole tightening it until the hub is release. Note Ensure that the top of the keyway oesn t get in contact with the bottom of the seat. It is recommene to keep a certain clearance. ACCESSORIES - SER-SIT 150 Pulleys an components

37 SER-SIT conical bushing: slip torques an allowable axial loa The slip torques have been calculate consiering the nominal tightening torque for the screws (s), a friction coefficient value η = 0,14 an in case of assembly without keyway. Taper Bushing SER-SIT Bore iameter Slip torque [Nm] Allowable axial loa [N] TAPER BSHING Pulleys an components 151

38 SIT SEROCK SEROCK is the new patente, keyless self locking bushing for immeiate use with all power transmission components suitable for the SER-SIT, T/ or similar tapere bushings: Is irectly interchangeable with SER-SIT or T/ tapere bushings Available in 1108, 1210, 1610, 2012, 2517, 3020 sizes ith bore iameters from 12 to 70 mm accoring to the bush sizes Allows infinite axial an angular ajustments SEROCK is an innovative clamping system which combines all the avantages of SIT-OCK friction keyless bushings with the extensive availability of a wie range of PT components for tapere bushings such as: V an Poly-V Pulleys Timing Pulleys Couplings Sprockets 4) Tighten the clamping screws graually an evenly accoring to the cross outline until the torque s, inicate in the technical tables is achieve. NOTE: Do not lubricate the SEROCK bushing or the shaft on which it is mounte. To isassemble: 1) Disassemble the tightening screws; 2) Insert the screws in the threae isassembly holes, tightening them until the tapere bushing is release; In orer to remove the outer ring, if necessary: 3) After having remove the inner bushing, loosen the set screws; 4) Keeping the loosene set screws in place, position the inner bushing rotate 30 in relation to the original position; 5) Insert the screws an tighten them graually until the inner ring is release. SEROCK eliminates: All problems relate to conventional keyway systems (backlash, breakage, fretting corrosion, ifficult isassembly, restraine axial an angular positioning of the component on the shaft); Aitional machining on the component to be fixe on the shaft, require when using conventional cone/clamping elements. ith the following benefits: Immeiate availability of the system (element to be clampe + avance clamping system); Easy assembly an isassembly; Possibility of reucing the iameter of the shafts use by up to 25%; Easy angular an axial ajustment of the component with respect to the shaft; Possibility of using SEROCK also on shafts with keyway. COPONENTS - S All this means an immeiate avantage for the user as a result of the potential increase in prouctivity. Orer form Assembly is extremely simple an fast: 1) Assemble SEROCK bushing to the hub by means of the two set screws; 2) Position the part on the shaft in the require axial an angular position; 3) Graually tighten the set screws until the torque s, inicate in the technical tables, is achieve; Part S: SEROCK Size F...: bore iameter (mm) S 1108 F Pulleys an components

39 Dimensions an performances of stanar types For ifferent bore, sizes, or hollow shaft application, please contact our Technical Dept. Shaft tolerance h8 or better if not otherwise specifie, are shown in mm imensions. SEROCK 1108 Dimensions Performances Screws Setscrews H H1 H2 D T [Nm] Fax [N] N Tipo s Key N Tipo s Key S1108F ,5 33, , /4 4,9 3 S1108F ,5 33, , /4 4,9 3 S1108F ,5 33, , /4 4,9 3 S1108F ,5 33, , /4 4,9 3 S1108F ,5 33, , /4 4,9 3 S1108F ,5 33, , /4 4,9 3 S1108F ,5 33, , /4 4,9 3 S1108F ,5 33, , /4 4,9 3 Ø Ø SEROCK 1210 Dimensions Performances Screws Setscrews H H1 H2 D T [Nm] Fax [N] N Tipo s Key N Tipo s Key S1210F ,5 43, / S1210F ,5 43, / S1210F ,5 43, / S1210F ,5 43, / S1210F ,5 43, / S1210F ,5 43, / S1210F ,5 43, / S1210F ,5 43, / S1210F ,5 43, / SEROCK 1610 Taglia Dimensions Performances Screws Setscrews H H1 H2 D T [Nm] Fax [N] N Tipo s Key N Tipo s Key S1610F ,5 43, / S1610F ,5 43, / S1610F ,5 43, / S1610F ,5 43, / S1610F ,5 43, / S1610F ,5 43, / S1610F ,5 43, / S1610F ,5 43, / S1610F ,5 43, / S1610F ,5 43, / S1610F ,5 43, / S1610F ,5 43, / S1610F ,5 43, / S1610F ,8 40, / SEROCK T Transmissible torque moment Nm S Screw tightening torque Nm F ax Transmissible axial loa N Pulleys an components 153

40 SEROCK 2012 Dimensions Performances Screws Setscrews H H1 H2 D T [Nm] Fax [N] N Tipo s Key N Tipo s Key S2012F ,5 53, / S2012F ,5 53, / S2012F ,5 53, / S2012F ,5 53, / S2012F ,5 53, / S2012F ,5 53, / S2012F ,5 53, / S2012F ,5 53, / S2012F ,5 53, / S2012F ,5 53, / S2012F ,5 53, / S2012F ,5 53, / S2012F ,5 53, / Ø Ø SEROCK 2517 Dimensions Performances Screws Setscrews H H1 H2 D T [Nm] Fax [N] N Tipo s Key N Tipo s Key S2517F ,5 68, / S2517F ,5 68, / S2517F ,5 68, / S2517F ,5 68, / S2517F ,5 68, / S2517F ,5 68, / S2517F ,5 68, / S2517F ,5 68, / S2517F ,5 68, / S2517F ,5 68, / S2517F ,5 68, / S2517F ,5 68, / S2517F ,5 68, / S2517F ,5 68, / SEROCK 3020 Dimensions Performances Screws Setscrews H H1 H2 D T [Nm] Fax [N] N Tipo s Key N Tipo s Key S3020F ,5 78, / S3020F ,5 78, / S3020F ,5 78, / S3020F ,5 78, / S3020F ,5 78, / S3020F ,5 78, / S3020F ,5 78, / S3020F ,5 78, / S3020F ,5 78, / S3020F ,5 78, / S3020F ,5 78, / S3020F ,5 78, / S3020F ,5 78, / T Transmissible torque moment Nm S Screw tightening torque Nm F ax Transmissible axial loa N 154 Pulleys an components

41 otor Bases

42 SIT OTOR BASES OTOR BASES COPATTA - TC Description COPATTA motor base is very easy to install, it is suitable for any motor type an it has a reuce height. The motor base setting is ajustable by spanner without moving the motor bolts an without compromising the rive alignment. The motor base have been esigne to allow a wie ajustment range. The six moels escribe below are available at stock. This motor base series is manufacture in galvanize steel, other material like stainless steel are available on request. SIT is capable to manufacture customize motor bases in accorance with customer requirements. Part TC EDIA TC: motor bases Compatta Size otor Bases otor size S S S 225 TC 80 (mignon) TC 90 (piccola) TC 112 (junior) TC 132 (meia) TC 180 (maxi) TC 225 (magnum) otor Base ax ajustment Electric otor Size Electric otor Power 2 poles (2.800 giri/min) [k] Electric otor Power 4 poles (1.400 giri/min) [k] A B C D E F I Ch V a x b x h eight [kg] OTOR COPONENTS BASES TC 80 (mignon) TC 90 (piccola) TC 112 (junior) TC 132 (meia) TC 180 (maxi) TC 225 (magnum) ,12-1,1 0,1-0, x110x9 1, ,37-2,2 0,25-1, x135x9 2, ,75-4 0, , ,5x153,5x13 3, ,5-9 1,1-7, , ,5x181,5x13 5, x280x15 12, x335x18 22,5 Pulleys an components 157

43 OTOR BASES VAREX - TX Description The VAREX motor bases (mae of galvanize steel), are an economical an optimal solution in the variable spee systems mae with variable spee pulley in which the axial isplacement of the electric motor allows a continuous spee variation of the riven shaft. N 6 FORI ø= otor Bases TX (mignon) TX (piccola) TX (meia) otor size ax ajustment S S Part TX EDIA TX: motor bases Varex Size otor Bases Electric otor Size Electric otor Power 2 poles (2.800 giri/min) [k] Electric otor Power 4 poles (1.400 giri/min) [k] A B D E F G H I N O V eight [kg] TX (mignon) TX (piccola) TX (meia) ,12-1,1 0,1-0, , , ,37-2,2 0,25-1, , , ,5-9 1,1-7, , ,0 158 Pulleys an components

44 OTOR BASES INEA - TT Description This new range of universal motor bases INEA (mae of galvanize steel) allows the mounting an ajustment of all types of electric motors in almost all positions. In case of mounting upsieown, please consult our technical epartment. The very strong construction of the INEA motor bases an the special fixing elements allow all types of combinations by the positioning of the ajusting threae elements. The mounting of the electric motors is mae easy by a reuce number of stanar components an by the correct keeping of position of the fixing element in the motor base. The INEA motor bases may be fixe to their basement by means of bolts as well as by weling when the basement is steel mae. Part TT 100/10 TT: motor bases inea Size otor Rail Sliable push button otor fixing bolt Plate Stirrup Tipo A Tipo B otor Base otor A B C D E F TT71/ ,5 2,4 TT80/ ,5 2,7 TT90/ ,3 TT100/ ,4 TT112/ ,2 TT132/ ,5 7,8 TT160/ ,5 8,8 TT180/ ,0 TT225/ ,4 TT280/ ,0 G H N X max. Y max. S ) eight [kg] OTOR COPONENTS BASES TT355/ ,0 TT400/ ,0 Pulleys an components 159

45 OTOR BASES TV 909 Description The motor bases TV909, mae in cast iron, have been esigne to allow spee variation through the axial isplacement of the electric motor equippe with a variable spee pulley. The rigiity an the possibility of fine regulation of this motor base by means of a system mae by a han wheel guie screw, allow to solve applications where the spee of the riven shaft must be set very precisely. The sliing is ensure by two ovetail guies largely imensione that allow a very easy setting. To fix the motor base it is sufficient to move the top surface in both irections turning the hanheel, in orer to uncover the fixing holes. Part TV909 G2 TV: motor bases TV909 Size otor Base A B C D mm] E G N O ax Ajustment eight [kg] TV909 G , ,7 TV909 G , ,6 TV909 G , ,5 160 Pulleys an components

46 OTOR BASES TV 910 Description The motor bases TV910, mae of cast iron, have the same technical characteristics of the 909 moel but they have been esigne with a reuce thickness in orer to solve problems where compact esign is neee. The hanheel is mounte on the top of tail support an the connection between its axis an the screw ajustment system is mae by an universal joint that allows a backlash free transmission. The hanheel is locate higher than the basement allowing, in that way, the use of these motor bases where the encumbrance limits o not allow the use of other proucts. Part TV910 G2 TV: motor bases TV910 Size OTOR COPONENTS BASES otor Base A C D E F G H I P ax Ajustment eight [kg] TV910 G , ,1 TV910 G , ,9 TV910 G , ,5 Pulleys an components 161

47 Ajustable otor Bases TB 911 Description The ajustable pivot plate motor bases TB 911, mae-up of cast iron an steel, have been esigne for spee variation application with variable spee pulley in which the isplacement of the motor can be mae only by pivoting. These motor bases consist of a jointe fixing plate an a screw regulation system with han wheel jointe as well in orer to allow pivoting. The outfit is kept in two ifferent planes by jointing axis an ouble pillow blocks imensione to give a high rigiity to the mounting. The esigne reuction is sufficient to have the regulation range esire in all applications. This type of motor base may equally be use to ensure the belt tensioning between an electric motor an a riven machine in those cases where the encumbrance oes not allow the use of conventional motor bases. Part TB 1 TB: motor bases TB911 Size otor Base A* B C D E F G H* I N O P R eight [kg] TB ,4 TB ,0 * ith 90 angle between hanheel axle an basement 162 Pulleys an components

48 Belt tensioning an alignment

49 TEN-SIT belt-tension electronic gauge TEN-SIT 2.0 is an electronic belt gauge, use for the correct tensioning of all types of belt rives. Its operating principle is base on the relationship between belt tension an the vibration frequency of the belt itself. TEN-SIT 2.0 is able to measure accurately the tension of any belt ue to its flexible microphone. Part STENSIT/02 TEN-SIT Belt tension. Key features Reliability an precision Suitable for any kin of belt Hany an versatile ight an compact Sensitivity range Hz niirectional microphone Operating instructions Ensure the rive is stationary. Check that the probe is connecte to the gauge. Press the ON button to start the unit. Place the probe as close as possible to the back of the belt at mi span f without touching it when it vibrates. If it were not possible, because of a cover, irect the probe towars the inner part of the belt. Vibrate the belt by striking it with a hammer or other metallic object. Rea the frequency value (Hz) on the isplay once the acoustic signal has been hear. The unit is able to recognise an ifferentiate the ifferences between belt vibrations an backgroun noise. The isplay will show the frequency an alternately the number of measurements mae hen installing "multiple belt" rives measure each belt iniviually an use the average value. ith single belts 2 or 3 measurements shoul be taken to ensure accuracy. Calculation example Stationary * See linear masses table. Belt: 3150 HPPD PS SIT Coe: HPPD3150P1455 Belt mass linear: (0,421/40) 55 = 0,579 [kg/m] (values taken from mass table) Tension T: 2150 [N] (Tension value T, with stationary rive an ile pulleys, is constant along the whole belt) Belt span length f : 0,65 [m] The right frequency value that must be obtaine an rea on TEN-SIT gauge is: Frequency To etermine the tension value of a belt whose frequency is inicate by the TEN-SIT 2.0 as 53 Hz use the following formula: Tension T = 4 f f = 4 0,579 0,65 53 = 2749 [N] f = 1 2 f T = 1 2 0, ,579 = 46,9 [Hz] 164 Pulleys an components

50 inear masses timing belts inear masses timing V-Belts Belt Pitch profile ith belt inear mass [kg/m] Belt Pitch profile of belts inear mass [kg/m] SIT ustang Torque SIT ustang Spee SIT HPPD Plus HTD , , , , , , , ,115 SIT TORQE-FEX XP (ISO) SIT CASSICA V-BETS TORQE-FEX (ISO) XP - 0,079 XPA - 0,110 XPB - 0,192 XPC - 0,310 X - 0,053 AX - 0,100 BX - 0,158 CX - 0,251 CASSICA Imperial Pitch ,421 X 25,4 0,056 25,4 0,082 H 25,4 0,120 XH 25,4 0,282 XXH 25,4 0,406 SIT NARRO V-BETS EDGE - Envelope (RA) SIT NARRO V-BETS EDGE oule Cog (RA) 3V - 0,078 5V - 0,236 8V - 0,531 3VX - 0,070 5VX - 0,192-0,059 SIT EXCEITE ES (ISO) A - 0,118 B - 0,197 C - 0,335 D - 0,630 here belt withs iffer from the ones shown in the table, pro rata the with to obtain the value. For bane, multiply the mass value by the number of ribs on the belt. SIT EXCEITE ES NARRO (ISO) SIT BANDED V-BETS NARRO (ISO) SIT BANDED V-BETS Classical (ISO) SIT NARRO BANDED V-BETS EDGE (RA) SP - 0,059 SPA - 0,118 SPB - 0,197 SPC - 0,335 SP 1 0,100 SPA 1 0,132 SPB 1 0,252 SPC 1 0,433 BX 1 0,213 CX 1 0,349 3V 1 0,118 5V 1 0,283 8V 1 0,705 Relationship between belt tension an frequency T = 4 In which: 2 2 f f T = Static belt tension = inear belt mass f = Belt span lenght f = Belt span vibration frequency f = 1 2 f T [N] [kg/m] [m] [Hz] tilizing the formula it is possible to calculate simply the esire frequency for any belt rive. If the inicate measurement is less than the calculate value the belt will require further tension, if however the measurement is greater than the calculate value slacken the rive. In both cases measure again. NOTE: It is necessary to run the rive uner loa for approximately one or two minutes an then use the TEN-SIT 2.0 to verify the tension value, an retighten if necessary. hen you have finishe using the TEN-SIT 2.0 gauge press an hol the OFF button until the triple acoustic signal is hear. If OBAT appears on the isplay please replace the battery. TEN-SIT 2.0 an INE-ASER Pulleys an components 165

51 SIT INE-ASER - pulleys alignment laser evice In orer to get the proper performances an lifetime of the belt rive, pulley must be correctly aligne. The INE-ASER is the ieal solution for the perfect an quick alignment. ight an reliable, it combines the laser technology precision with the easy use. Avantages Belts, pulleys an bearings longer life Suitable for any pulley type Vibrations reuction It corrects axial an angular misalignments ower friction an energy consumption Three control references Characteristics ax allowable center istance: 2 meters (more than can be use, but the beam with is ae to the error of pointing) aximum error: 1 mm per meter Note: The evice, by shocks (eg. Acciental fall) coul lose the alignments. Check perioically on a reference surface the tool alignment. Drive alignment Synchronous belts are very sensitive to misalignment. Tension carrying members are generally twiste, multiple strans, of fibreglass cor. Fibreglass has a high tensile strength an resistance to elongation, resulting in a very stable belt prouct. Any misalignment will lea to inconsistent belt wear, uneven loa istribution an premature tensile failure. In general, synchronous rives shoul not be use where misalignment is a problem. isalignment shoul be limite to 1/4 egree or 4.3 mm per metre of centre istance. isalignment can be efine in one of two ways. First, if two sprockets are not locate equally on shafts, sprockets are then misaligne, as in Fig. 1. Secon, shafts may not be parallel, resulting in misalignment, as in Fig. 2. Position of the 3 control marks isaligne Any egree of misalignment will reuce belt life an cause ege wear. Therefore, INE-ASER shoul be use to check proper alignment verifying that sprockets an shafts are parallel. isalignment, at times, may cause tracking problems. Although some tracking is normal an won't affect belt performance, it may be cause by poorly aligne sprockets. Flanges may control a tracking problem. Consiering a two sprocket rive, belt contact on a single flange is acceptable. Belt contact with the opposite flanges of two sprockets shoul be avoie. Aligne isalignment can also be attribute to the improper installation of a bushing or loose rive framework. Refer to sprocket manufacture guielines for proper bushing installation. Secure motor an framework to eliminate vibration centre to centre fluctuations. Possible lateral misalignment (Fig.1) Possible angular misalignment horizontal an/or vertical (Fig. 2) Perfect alignment with BET AIGNENT TOO Belt storage The transmission belts must be store at a temperature between the 15 an the 20 C, in a ry an clean place. They must be store in a horizontal position to avoi eformations. The belts must never be bent or hung on spikes or hooks. A long exposure to the irect sunlight an light can amage belts. 166 Pulleys an components