Technical features. Cam followers

Transcription

1 AM FOLLOWERS

2

3 Technical features am followers Naella cam followers are esigne to run irectly on various types of surface such as cams, ramps an slieways. In orer to satisfy the operating conitions impose on this type of bearing - heavy raial loas usually accompanie by substantial an repeate shocks, the various Naella cam followers have these coon avantages: eformations that reuce the loa capacity of the bearing contact surfaces or cylinrical ring for reucing contact pressure replenishment through the shaft am followers can be equippe with an eccentric stu in orer to allow setting the preloa uring the mounting. am followers can be equippe with plastic seals or metallic shiels for retaining lubricant. esies the stanar proucts in the catalogue, Naella manufactures several variations for specific conitions of use. TO USE AS FOLLOWERS When the cam followers or the wheels are use for running on a rail or a cam, uner the loa there is a plastic eformation of the ring that reuces the loa istribution between the rolling elements of the bearings. The tables in the following pages list two ifferent values of the basic loa of the bearing epening from the use an mounting. value accoring to stanar ISO 281 for bearings, for lifetime calculations when mounting with the cylinrical ring in a hole. w, for lifetime calculations when mounting with the cylinrical ring running in contact with a cam or plain guie rail. In aition to the loa capacity of the bearing you must consier the strength of the ring an of the stu in the cam followers. ynamic limit loa Fr: it is the loa which shoul not be Static limit loa For In case of use like a wheel the strength of the raceway must be consiere. For more etails, please ask to Technical Service Naella. Reference stanars are: ISO 7063 Neele roller bearings Track rollers bounary imensions. 117

4 Technical features am followers TYPES AN OPERATING ONITIONS Full complement neele followers types G These followers are recoene uner following conitions: - low spees - high raial loas - oscillating motions G GL) GR or GRL) Starting from imension 16 can be equippe with EE) or contact metallic EEM) ouble-row full complement roller followers types NUKR.2SK Their installation is especially recoene for: - high spees - heavy raial loas Outer ring with optimise profile with ecreasing curvature from mile of the wheel NUKRE) MM) Single-row full complement roller followers types GU Their installation is especially recoene for: - high spees - heavy raial loas GU GUL) GUR or GURL) MM) Small single-row full complement neele followers type FP Their installation is especially recoene for: - low spees - heavy raial loas - oscillating motions FP FPL) Single-row full complement neele followers type FG Their installation is especially recoene for: - low spees - heavy raial loas - oscillating motions FG, FP FGL, FPL). am followers FG can be equippe with contact plastic EE EEM). 118

5 Technical features am followers Single-row full complement roller followers type FGU (heavy an light series) Their installation is especially recoene for: - high spees - heavy raial loas Heavy series is ifferent from light series for the thickness iameter an an higher loa capacity. FGU FGUL). Inner ring an lateral shoulers built in a single piece. MM). Single-row full complement neele followers type RNA These followers useable without inner ring on a treate shaft, are available with an inner ring starting from a shaft iameter 12, an their installation is especially recoene for: - intermeiate spees - heavy raial loas - oscillating motions MISALIGNMENT TOLERANES like for the following table: am follower type RNA in 1000 ouble-row full complement roller followers type NUTR Their installation is especially recoene for: - high spees - heavy raial loas Heavy series is ifferent from light series for the thickness iameter an an higher loa capacity. NUTR NUTR.Z). Inner ring in three parts, not separable. Metallic shiels. RNA in 1000 FG, G, GU 7 in 1000 TOLERANES ON OUTER IAMETER For all type of follower: - cylinrical ring h7 on im. Out of rounness in accorance to ISO 7063 AVIE ON ASSEMLY Positioning of the raial lubrication hole shock or vibration, the lubrication hole situate uner the neeles shoul be positione outsie the loae zone. The lubrication hole which is not visible on the cam follower with threae stu is parallel to the screwriver slot in the hea of the stu. Where the hea lubrication hole is inicate by the marking by the hole. 119

6 Technical features am followers Lateral support of followers For followers type FGU shoulers on the shaft or other parts serving to retain the follower on the faces of the inner ring shoul have an iameter not less than imensions A shoul be equal at least to imension A liste in the tables. For followers of FG series shoulers on the shaft shoul be equal at least to imension A. For the correct mounting of followers of NUKR series avise for locking is A liste in the tables. AM FOLLOWERS G, GU AN NUKR SERIES Tolerance on hole housing The stu shoul fit easily into the hole in the mating member having a bore of tolerance H7. To ensure contact over the entire surface area of the yoke, the supporting face of the mating member shoul have a iameter of at least equal to imension A. The locking torque applie to the nuts, as shown in the table of the follower. am followers G GU NUKR series Without eccentric stu With eccentric stu AM FOLLOWERS FG FGU RNA1000 NUTR Shaft tolerances am followers NUTR FP FG FGU series Loa fixe in relation to the inner ring Loa rotating in relation to the inner ring Loa fixe in relation to the inner ring, moerate loas, high strength shaft imension H7 1 H7 imension h5 / h6 k5 / j6 g6 For RNA fitte with inner ring Loa fixe in relation to the inner ring Loa rotating in relation to the inner ring For RNA without inner ring Harene an groun steel shaft imension h5 / h6 k5 / j6 imension Fw h5 The cylinrical tolerance, efine as the ifference in normally be less than a quarter of the manufacturing tolerance. However, for high precision or high spee applications it is avise to restrict this tolerance to one eighth of the manufacturing tolerance. LURIATION - OPERATING TEMPERATURE Type RNA followers are supplie with a coating of protective grease compatible with a lithium base grease. As for the bearings the protective grease is not suitable for lubrication of the wheels. All types of wheels an cam followers, with or without seals are supplie lubricate with a grease permitting operation in temperatures from -20 to In the versions with metallic shiels or in synthetic material EE-Teflon lubricant. On request, these followers can be supplie with greases for high or low temperatures, or without In any case, at temperatures of 150 an above, cam followers must be specially heat treate an calculation of life shoul take account of reuce loa capacity Use of a special grease for high temperatures may reuce the limiting spees shown in the tables of imensions. The metallic shiels...eem MM enables operation up to 200 with a suitable lubricant. Loa fixe in relation to the inner ring, light loas, unharene shaft, loose transition fit f6 120

7 Technical features am followers EENTRI STUS the hole of the housing at the time of installation, track rollers are available with eccentric bushing ae to the track roller stu fitte with interference. In this way the position of the bearing can be settle for a value of ±k. The eccentric bushing closes the lubrication hole on the stu. As a stanar eccentric bushing are supplie alreay mounte on the stu. AESSORIES FOR FOLLOWERS am followers with lubrication hole are supplie with cap an grease nipple. Insert the one or the other in the appropriate en seats in function of the sie from which the lubrication will be performe. The cap is completely inserte for all its length by pressure. The nipple has instea a step that is not within the length of the hole for the portion that protrues of 2.5 imension h. am followers of G series an erive from imension top en for a grease nipple an a screw river slot. The nipple protrues from the ege of the hea. am followers of G series, from iameter 30 an GU nipple protrues only if mounte on the stu sie. In cam followers NUKR series the nipple is always hie The raial hole in the stu, if not use, is close by the housing of the cam follower. oncentric cam followers G GU an NUKR series are supplie with two nuts. Eccentric cam followers GR GUR NUKRE series are supplie with eccentric bushing, one nut, one lock washer, one flat washer From G16 to G28 h NA From G30 an GU h NUKR.2SK 121

8 am followers G G, GL series without seals G A 1 G1 4 2 esignation 1) G GL 1 1 G..., GL G1 Threa G M4x M4x M5x M5x M6x M6x rs min. A 2) 1 1) esignation for cam followers G... oncentric cam followers with convex ring without seal GL... oncentric cam followers with cylinrical ring without seal 2) Minimum recoene abutment iameter in case of heavy axial loas or vibrations 122

9 lamping torque Nm asic capacities kn Spee limits grease lubrication min -1 Weight kg as a bearing as a follower yn. Stat. o yn. w yn. Fr Stat. For

10 Neele cam followers G.. r 3 2 Holes 1 an 2 from =30 r e r 4 e G k 1 k 1 M 1 A G1 S S from GR16.. to GR52.. from GR62.. to GR90.. G.. esignation 1) G..., G...EE G...EEM 2) 1 2) 3) k 3) M 3) e 3) ) 4 G1 Threa G M6x M8x M10x M10x M10x M10x M12x M12x M16x M18x M20x M20x M24x M24x M30x M30x M30x ) am follower esignation G.. oncentric cam followers with convex ring GL.. oncentric cam followers with cylinrical ring GR.. Eccentric cam followers with convex ring GRL.. Eccentric cam followers with cylinrical ring Without suffix: without seals Suffix..EE: with plastic seals Suffix..EEM: with metallic shiels A 4) 124

11 Neele cam followers G.. hea sie view NA G..EE, G..EEM P up to iameter =28 from iameter =30 r min. P 4 S 6) lamping asic capacities KN Spee limits Weight with grease torque as a bearing as a follower nut an lubrication min. max. Nm yn. Stat. min -1 washer kg o yn. w yn. Fr Stat. For ) Hole iameter for mounting the concentric follower: H7 Hole iameter for mounting the eccentric follower: 1 H7 3) imension of the stu with eccentric bushing 4) Minimum recoene abutment iameter in case of axial loas or vibrations 5) On request cam followers can be prouce with screw river slot on the en of the threae stu (suffix AK) 6) Mounting plate thickness 7) For concentric rollers only (without eccentric bushing) 125

12 Roller cam followers GU.. r 3 e 4 e 4 4 G k 1 k 1 M 1 4 A 1 2 G1 S S GU.. from GUR35.. to GUR52.. from GUR62.. to GUR130.. esignation 1) GUR GUR...M M 2) 1 2) 3) k 3) M 3) e 3) ) 4 G1 Threa G M16x M18x M20x M20x M24x M24x M30x M30x M30x M36x M36x M42x M42x3 71 1) am followers esignation GU.. oncentric cam follower with convex ring GUL.. oncentric cam follower with cylinrical ring GUR.. Eccentric cam follower with convex ring GURL.. Eccentric cam follower with cylinrical ring Without suffix: without seals Suffix..MM: with metallic shiels A 4) 126

13 hea sie view NA P 1 r min. P 4 S 6) lamping asic capacities KN Spee limits Weight grease with nut torque as a bearing as a follower lubrication an min. max. Nm yn. Stat. o yn. w yn. Fr Stat. For min -1 washer kg ) Hole iameter for mounting the concentric follower: H7 Hole iameter for mounting the eccentric follower: 1 H7 3) imension of the stu with eccentric bushing 4) Minimum recoene abutment iameter in case of axial loas or vibrations 5) On request cam followers can be prouce with screw river slot on the en of the threae stu (suffix AK) 6) Mounting plate thickness 7) For concentric rollers only (without eccentric bushing) 127

14 Roller cam followers NUKR..2SK r 3 e 4 4 G k 1 1 A 2 G1 1 NUKR..2SK NUKRE35..2SK esignation 1) NUKR..2SK NUKRE..2SK 2) 1 2) 3) k 3) M 3) e 3) G1 3 Threa G M16x1.5 23, M18x1.5 26, M20x M20x1.5 36, M24x1.5 44, M24x1.5 50, M30x1.5 52, M30x1.5 52,9 1) esignation for cam followers NUKR..2SK oncentric cam follower with profile ring NUKRE..2SK Eccentric cam follower with profile ring 2) Hole iameter for mounting the concentric follower: H7 Hole iameter for mounting the eccentric follower: 1 H7 3) imension of the stu with eccentric bushing 4) Minimum recoene abutment iameter in case of axial loas or vibrations 5) For concentric rollers only (without eccentric bushing) A 4) 128

15 Roller cam followers NUKR..2SK hea sie view NA P 1 r min. P 4 lamping torque Nm 4) asic capacities kn Spee limits grease lubrication min -1 Weight with nut an washer kg as a bearing as a follower yn. Stat. o yn. w yn. Fr Stat. For

16 Small neele cam follower FP FP, FPL series without seals r s r 1s FP, FPL esignation 1) FP, FPL rs min. r1s min. as a bearing asic capacities kn as a cam follower yn. Stat. o yn. w yn. Fr Stat. For Spee limits grease Weight lubrication kg min ) esignation FP onvex ring FPL ylinrical ring 130

17 Neele cam follower FG FG series without seal FG..EE series with plastic seals FG..EEM series with metallic shiels r s r 1s FG..EE, FG..EEM FGL..EE, FGL..EEM A FG, FGL esignation 1) A 2) rs min. r1s min. asic capacities kn Spee limits grease lubrication min -1 Weight kg FG, FGL as a bearing as a follower yn. Stat. o yn. w yn. Fr Stat. For ) esignation FG..EE series with plastic seals are available up to type FG FG convex ring FGL cylinrical ring 2) Minimum recoene abutment iameter in case of axial loas or vibrations 131

18 Full complement roller cam followers FGU Light series FGU.. without seals FGU..MM with metallic shiel FGU, FGUL r s r 1S A esignation 1) FGU, FGUL light series A 2) rs min. r1s min. asic capacities kn ynamic Static Spee limits grease lubrication min -1 Weight kg Fr For ) esignation FGU convex ring FGUL cylinrical ring 2) Minimum recoene abutment iameter in case of axial loas or vibrations 132

19 Full complement roller cam followers FGU Heavy series FGU.. without seals FGU..MM with metallic shiels FGU, FGUL r s r 1S A esignation 1) FGU, FGUL heavy series A 2) rs min. r1s min. as a bearing asic capacities kn as a follower Spee limits grease lubrication min -1 yn. Stat. o yn. w yn. Fr Stat. For ) esignation FGU convex ring FGUL cylinrical ring 2) Minimum recoene abutment iameter in case of axial loas or vibrations Weight kg 133

20 am followers without inner ring RNA r s E w F w RNA...6 esignation 1) asic capacities KN 2) 3) Fw Ew rs min. as a bearing as a follower RNA 6 RNA RNAL yn. Stat. o yn. w yn. Fr Stat. For 19 RNA RNA RNA RNA RNAL RNA RNA RNAL RNA RNA RNAL RNA RNA RNA RNA RNAL RNA RNA RNAL RNA RNA RNA RNA RNA RNA ) esignation RNA..6 onvex ring with maximum inclination 0.15% RNA onvex ring with maximum inclination 1,5% RNAL ylinrical ring 2) asic capacities refer to RNAL type only when mounte force in a housing 3) Tolerances on imension : h9 for RNA..6 an RNA, h7 for RNAL 134

21 Inner ring I r 1s F I Spee limits grease lubrication min -1 Weight kg Shaft esignation I I I I I I I I I F Fw r1s min. 135

22 Full complement roller cam follower NUTR r s r s R500 r 1s r 1s A A NUTR NUTR.Z esignation 1) A rs min. r1s min. asic capacities kn Spee limits grease lubrication min -1 Weight kg NUTR, NUTR.Z as a bearing as a follower yn. Stat. o yn. w yn. Fr Stat. For ) esignation NUTR onvex ring NUTR.Z ylinrical ring 136