fyhcat mounted bearings units

Appendix Table
Appendix Table 2 Tightening Torques of Housings and Cast Iron Cover Mounting Bolts
(1) Tightening torques of housings
mounting bolts
(recommended)
Nominal size
of screws
Tightening torques
N · m
M 6 2.6− 4.7
M 8 6 − 10
M10 12 − 21
M12 21 − 37
M14 34 − 60
M16 53 − 93
M18 77 − 137
M20 104 − 186
M22 143 − 256
M27 266 − 478
M30 360 − 645
M33 494 − 886
M36 631 −1,130
(2) Tightening torques of plastic housings mounting bolts
(recommended)
Nominal size
of screws
M10
M12
(3) Tightening torques of cast iron cover mounting bolts
(recommended)
Nominal size
of screws
Tightening torques
N · m
17.7−24.5
29.4−44.1
Tightening
torques, N · m
Part No. of applicable cast iron covers
(reference)
200 series X00 series 300 series
M3 0.3− 0.6 204, 205 − −
M4 0.8− 1.4 204FC3 (FD3), − 305−307
205FC3 (FD3),
206−215
M5 1.5− 2.8 216−218 X18, X20 308−324
M8 6 −10 − − 326, 328
Appendix Table 3 Tightening Torques of Inner Rings and Eccentric Locking Collar Set Screws
(1) Tightening torques of inner rings and eccentric locking collar set screws (metric series) (recommended)
Nominal size Tightening
Part No. of applicable bearings
of screws torques, N · m UC2, RB UCX UC3 NA SB SU ER
M 3X0.35 0.7 08, 000, 001
M 4X0.5 1.8 − − 002, 003
M 5X0.5 3 201X−203X − − 201−203 004−006 −
M 6X0.75 4 201−206 X05 305, 306 204, 205 204−207 − 201−206
M 8X1 8.5 207−209 X06−X08 307 206−210 208 207−209
M10X1.25 17.5 210−212 X09−X11 308, 309 211, 212 − 210−212
M12X1.5 28 213−218 X12−X17 310−314 − −
M14X1.5 35 − X18 315, 316
M16X1.5 56 X20 317−319
M18X1.5 62 − 320−324
M20X1.5 83 326, 328
Remarks 1) Tightening torques of set screws for UC2-S6 are identical to that of UC2. As for UC210S6, tightening torque of
the set screw M8 × 1 should be applied.
2) When the application will be exposed to vibration and shock load additional tightening will be required. The
maximum torque tightening should not exceed 1.5 times the normal torque tightening specifi cations.
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