>> P.88
Standard Mass (Ref. )gClosed endMass (Ref. )gStandard Mass (Ref. )gClosed endMass (Ref. )gGrease retainedMass (Ref. )g────────────────────────────YT 3720 81YT 4015YT 4025 63.5109────────────YT 4520YT 4525 96122──────────────────────────────────TA 3720 ZTA 3730 Z─ 64.5101─TAM 3720TAM 3730─ 73110─TA 3815 ZTA 3820 ZTA 3825 ZTA 3830 ZTAW 3845 Z 51 65.5 82.5104149TAM 3815TAM 3820TAM 3825TAM 3830TAMW 3845 60 74.5 96114159TLAM 4012TLAM 4016TLAM 4020 40 49 58.5TLA 4012 ZTLA 4016 ZTLA 4020 Z 30 39 49────────────────────────────────────────TLA 4516 ZTLA 4520 Z 43.5 54.5TLAM 4516TLAM 4520 56 67────────────────40TA 4015 ZTA 4020 ZTA 4025 ZTA 4030 ZTA 4040 Z 54 69.5 86.5110144TAM 4015TAM 4020TAM 4025TAM 4030TAM 4040 63.5 79102120154────────────────────────────────45TA 4520 ZTA 4525 ZTA 4530 ZTA 4540 Z 77102122161TAM 4520TAM 4525TAM 4530TAM 4540 90115135174Shaftdia.mm3738Note(1) llowable rotational speed applies to oil lubrication. For grease lubrication, a maximum of 60% of this value is allowable.Remarks1."W" in the identication number indicates that rolling elements are arranged in double rows.2. hell Type Grease Retained Full Complement Needle Roller Bearings are provided with prepacked grease. Standard type and types of type bearings are not provided with prepacked grease, so perform proper lubrication when using these closed end bearings.B21SHELL TYPE NEEDLE ROLLER BEARINGSShaft dia. 37-45mmIdentification number
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