14-81
b. FORWARD BEVEL GEAR SHIM
1) Assemble the outer race and the inner race of the 50 x 90 x
28 mm taper bearing, and turn the outer race two or three
turns.
2) Measure the bearing height (distance F) from the outer race
end to the inner race end as shown, and record the
measurement.
3) Measure the inner race height (distance K) as shown, and
record the measurement.
4) Determine the calculation value using the bearing height
(distance F), inner race height (distance K) and the
following formula.
Formula:
Bearing height (distance F) – Inner race height (distance K)
= Calculation value
Example:
When, bearing height (distance F) is 28.05 mm (1.104 in),
And, inner race height (distance K) is 28.00 mm (1.102 in):
28.05 – 28.00 = 0.05
Therefore, the calculation value is 0.05 mm (0.002 in).
5) Check the calculation value and select the shim of the
appropriate thickness from the shim selection table
accordingly.
• Shim type table
[3] Unit: mm (in)
[1]
50 x 90 x 28 mm
TAPER BEARING
(INNER RACE)
[1]
OUTER RACE
[2]
INNER RACE
[1] Shim type
[2] Thickness
[3] Forward bevel gear shim A
0.10 mm (0.004 in)
[4] Forward bevel gear shim B
0.15 mm (0.006 in)
[5] Forward bevel gear shim C
0.30 mm (0.012 in)
[6] Forward bevel gear shim D
0.50 mm (0.020 in)
[1] Calculation value
[2] Shim thickness
+0.15 – +0.10 (+0.006 – +0.004)
0.35 (0.014)
+0.10 – +0.05 (+0.004 – +0.002)
0.40 (0.016)
+0.05 – ±0 (+0.002 – ±0.000)
0.45 (0.018)
• Forward bevel gear shim selection table
