Page 63 - NSK_CAT_E1102m_A7-141

TECHNICAL DATA

15.2 Fits Table. 15. 1 Surface Pressure, Maximum Stress on Fitted MPa kgf/mm2
Surfaces and Expansion or Contraction 250 25
(1) Surface Pressure pm , Maximum Stress σtmax 200 20
Items Shaft & Inner Ring Housing & Bore & Outer Ring kgf/mm2 MPa 150 15 kgf/mm2 MPa MPa kgf/mm2
on Fitted Surfaces and Expansion of Inner Ring 5 50 100 10 10 100 400 40
Raceway Diameter & Di or Contraction of Outer Surface In case of housing outside dia. D0 ≠∞ 4 40 p6 300 30
Ring Raceway Diameter & De Pressure 3 30 n6 50 5 5 50 250 25
(Table 15.1, Figs. 15.5 and 15.6) (In case of sold shaft) pm= E &D (1– h2)(1– h02) Surface Pressure m2 20 m5 40 4 4 40 p6 200 20
pm 2 D k5 30 3 3 30 n6 150 15
(2) Interferences or Clearances of Shafts and Inner (MPa ) 1– h2 h2 Maximum Stress σ t max1 102 20 m5
Rings (Table 15.2) {kgf/mm2} 0 js5 20 2 k5 100 10
&d Surface Pressure m0.5 51 10
(3) Interferences or Clearances of Housing Bores pm= E 2 (1 – k2) In case D0 = ∞ 0.4 4 10 1 js5 50 5
and Outer Rings (Table 15.3) 2 Maximum Stress σ t max0.3 30.5 540 4
pm= E &D 0.4 4 30 3
2 D (1– h2) 0.2 2 0.3 3 20 2

Maximum stress Maximum circumferential Maximum circumferential stress on
outer ring bore surface is
σt max stress on fitted surface of
(MPa )
{kgf/mm2} inner ring bore is 2
1– h2
σt max = pm 1+ k2 σt max = pm
1– k2
5 0.5 10 1
Expansion of In case of solid shaft 0.1 1 20 30 50 70 100 200 300 500 mm 0.2 2 20 30 50 70 100 200 300 500 mm
inner ring
raceway dia. & Di = &d . k In case D0 ≠∞ h2 Nominal Bearing Bore Diameter d (Class Normal) Nominal Bearing Bore Diameter d (Class Normal)
0
& Di (mm) & De = &D · h 1–

Contraction of 1– h2 h2 Fig. 15.5 Surface Pressure m and Maximum Stress Fig. 15.6 Surface Pressure m and Maximum Stress
outer ring 0
raceway dia. σ t max for Average Fitting Interference σ t max for Maximum Fitting Interference
In case D0 = ∞
& De (mm) & De = &D · h

Remarks The modulus of longitudinal elasticity and Poisson's ratio for
the shaft and housing material are the same as those for inner
and outer rings.

Reference 1 MPa=1 N/ mm2= 0.102 kgf / mm2

Table 15. 2 Interferences or Clearances of Shafts and Inner Rings

Units : μm

Single Plane Interferences or Clearances for Each Fitting Class Size
Size Mean Bore Classification
Classification Dia. Deviation f6 g5 g6 h5 h6 js5 j5 js6 j6 k5 k6 m5 m6 n6 p6 r6
(mm) (Normal) Clearance Interference Interference Interference Interference Interference Interference (mm)
Clearance Inter- Clearance Inter- Clearance Inter- Clearance Inter- Clearance Inter- Clearance Inter- Clearance Inter- Clearance Inter- Interference min. max. min. max. min. max. min. max. min. max. min. max.
& d mp ference ference ference ference ference ference ference ference over incl.

over incl. high low max. min. max. max. max. max. max. max. max. max. max. max. max. max. max. max. max. max. min. max.

3 6 0 –8 18 29 4 12 45 88 8— — — — —— — —— —— —————— —— —— — 36
6 10 0 – 8 22 5 11 3 14 36 89 —— —————— ——
10 18 0 – 8 27 8 14 2 17 28 8 11 8 3 11 2 12 4.5 12.5 2 15 — —— —————— —— —— — 6 10
5.5 13.5 3 16 —
8 4 12 3 13 — — — 10 18

18 30 0 – 10 33 10 16 3 20 39 10 13 10 4.5 14.5 4 15 6.5 16.5 4 19 2 21 2 25 — — — — — —— — — — 18 30
30 50 0 – 12 41 13 20 3 25 3 11 12 16 12 5.5 17.5 5 18 —— — — — 30 50
50 65 0 – 15 49 15 23 5 29 5 13 15 19 15 6.5 21.5 7 21 8 20 5 23 2 25 2 30 9 32 9 37 — —— — — — 50 65

9.5 24.5 7 27 2 30 2 36 11 39 11 45 —

65 80 0 – 15 49 15 23 5 29 5 13 15 19 15 6.5 21.5 7 21 9.5 24.5 7 27 2 30 2 36 11 39 11 45 20 54 — —— — 65 80
80 100 0 – 20 58 16 27 8 34 8 15 20 22 20 7.5 27.5 9 26 11 31 9 33 3 38 3 45 13 48 13 55 23 65 37 — 80 100
100 120 0 – 20 58 16 27 8 34 8 15 20 22 20 7.5 27.5 9 26 11 31 9 33 3 38 3 45 13 48 13 55 23 65 37 79 — — 100 120
79 —

120 140 0 – 25 68 18 32 11 39 11 18 25 25 25 9 34 11 32 12.5 37.5 11 39 3 46 3 53 15 58 15 65 27 77 43 93 63 113 120 140
140 160 0 – 25 68 18 32 11 39 11 18 25 25 25 9 34 11 32 12.5 37.5 11 39 3 46 3 53 15 58 15 65 27 77 43 93 65 115 140 160
160 180 0 – 25 68 18 32 11 39 11 18 25 25 25 9 34 11 32 12.5 37.5 11 39 3 46 3 53 15 58 15 65 27 77 43 93 68 118 160 180

180 200 0 – 30 79 20 35 15 44 15 20 30 29 30 10 40 13 37 14.5 44.5 13 46 4 54 4 63 17 67 17 76 31 90 50 109 77 136 180 200
200 225 0 – 30 79 20 35 15 44 15 20 30 29 30 10 40 13 37 14.5 44.5 13 46 4 54 4 63 17 67 17 76 31 90 50 109 80 139 200 225
225 250 0 – 30 79 20 35 15 44 15 20 30 29 30 10 40 13 37 14.5 44.5 13 46 4 54 4 63 17 67 17 76 31 90 50 109 84 143 225 250

250 280 0 – 35 88 21 40 18 49 18 23 35 32 35 11.5 46.5 16 42 16 51 16 51 4 62 4 71 20 78 20 87 34 101 56 123 94 161 250 280
280 315 0 – 35 88 21 40 18 49 18 23 35 32 35 11.5 46.5 16 42 16 51 16 51 4 62 4 71 20 78 20 87 34 101 56 123 98 165 280 315
315 355 0 – 40 98 22 43 22 54 22 25 40 36 40 12.5 52.5 18 47 18 58 18 58 4 69 4 80 21 86 21 97 37 113 62 138 108 184 315 355

355 400 0 – 40 98 22 43 22 54 22 25 40 36 40 12.5 52.5 18 47 18 58 18 58 4 69 4 80 21 86 21 97 37 113 62 138 114 190 355 400
400 450 0 – 45 108 23 47 25 60 25 27 45 40 45 13.5 58.5 20 52 20 65 20 65 5 77 5 90 23 95 23 108 40 125 68 153 126 211 400 450
450 500 0 – 45 108 23 47 25 60 25 27 45 40 45 13.5 58.5 20 52 20 65 20 65 5 77 5 90 23 95 23 108 40 125 68 153 132 217 450 500

Remarks 1. The figures for tolerance classes where stress caused by the fitting of the shaft and inner ring becomes
excessive are omitted.

2. The tolerance range js is now recommended instead of j.

A 130 A 131