275 Unit: mm Note(1): From the values for ℓ given below, which are in the appropriate range in the table, one should be selected. The tolerance for ℓ should be h12 under JIS B0401 (dimension tolerance and fitting), in principle. 6, 8, 10, 12, 14, 16, 18, 20, 22, 25, 28, 32, 36, 40, 45, 50, 56, 63, 70, 80, 90, 100, 110, 125, 140, 160, 180, 200, 220, 250, 280, 320, 360, 400 Note(2): The appropriate shaft diameter should be matched with the torque corresponding to the strength of the key. Reference: The nominal sizes given in ( ) should not be used unless they are absolutely necessary. The groove for the boss should be slanted to 1/100, in principle. S2 − b C h 25 25 1.6 3.2 ℓ 6.3 6.3 S1 − d t2 t12 2r 1r b2 1b 1.6 6.3 1.6 6.3 b h f A h h 30° 1 2 3.2 1.6 ℓ A 6.3 6.3 S1 − S2 − ± 100 1 1000 1 b h c c Slope Slope Key (Code T) Gib Head Key Section of Key (A-A) Section of Key Groove h2=h, f=h, e≈b h2=h, f≈h, e=b 1 S2=Tolerance of h× 2 1 S1=Tolerance of b× 2 2. Slope Key, Gib Head Key and Key Groove Key Nominal Dimension b×h Dimension of Key Groove Dimension of Key Groove Reference b h h1 c ℓ( 1) b1 and b2 r1 and r2 Reference Dimension of t1 Reference Dimension of t2 Reference Dimension of t2, t1 Applicable Shaft Dia.(2) d Reference Dimension Tolerance (h9) Reference Dimension Tolerance Reference Dimension Tolerance (D10) 2×2 2 0 − 0.025 2 0 − 0.025 h9 − 0.16 ~0.25 6~30 2 +0.060 +0.020 0.08 ~0.16 1.2 0.5 + 0.05 0 6~8 3×3 3 3 − 6~36 3 1.8 0.9 8~10 4×4 4 0 − 0.030 4 0 − 0.030 7 8~45 4 +0.078 +0.030 2.5 1.2 + 0.1 0 10~12 5×5 5 5 8 0.25 ~0.40 10~56 5 0.16 ~0.25 3.0 1.7 12~17 6×6 6 6 10 14~70 6 3.5 2.2 17~22 (7×7) 7 0 − 0.036 7.2 0 − 0.036 10 16~80 7 +0.098 +0.040 4.0 3.0 20~25 8×7 8 7 0 − 0.090 h11 11 18~90 8 4.0 2.4 + 0.2 0 22~30 10×8 10 8 12 0.40 ~0.60 22~110 10 0.25 ~0.40 5.0 2.4 30~38 12×8 12 0 − 0.043 8 12 28~140 12 +0.120 +0.050 5.0 2.4 38~44 14×9 14 9 14 36~160 14 5.5 2.9 44~50 (15×10) 15 10.2 0 − 0.070 h10 15 40~180 15 5.0 5.0 + 0.1 0 50~55 16×10 16 10 0 − 0.090 h11 16 45~180 16 6.0 3.4 + 0.2 0 50~58 18×11 18 11 0 − 0.110 18 50~200 18 7.0 3.4 58~65 20×12 20 0 − 0.052 12 20 0.60 ~0.80 56~220 20 +0.149 +0.065 0.40 ~0.60 7.5 3.9 65~75 22×14 22 14 22 63~250 22 9.0 4.4 75~85 (24×16) 24 16.2 0 − 0.070 h10 24 70~280 24 8.0 8.0 + 0.1 0 80~90 25×14 25 14 0 − 0.110 h11 22 70~280 25 9.0 4.4 + 0.2 0 85~95 28×16 28 16 25 80~320 28 10.0 5.4 95~110 32×18 32 0 − 0.062 18 28 90~360 32 +0.180 +0.080 11.0 6.4 110~130 (35×22) 35 22.3 0 − 0.084 h10 32 1.00 ~1.20 100~400 35 0.70 ~1.00 11.0 11.0 + 0.15 0 125~140 36×20 36 20 0 − 0.130 h11 − 36 12.0 7.1 + 0.3 0 130~150 (38×24) 38 24.3 0 − 0.084 h10 36 − 38 12.0 12.0 + 0.15 0 140~160 40×22 40 22 0 − 0.130 h11 36 − 40 13.0 8.1 + 0.3 0 150~170 (42×26) 42 26.3 0 − 0.084 h10 40 − 42 13.0 13.0 + 0.15 0 160~180 45×25 45 25 0 − 0.130 h11 40 − 45 15.0 9.1 + 0.3 0 170~200 50×28 50 28 45 − 50 17.0 10.1 200~230 56×32 56 0 − 0.074 32 0 − 0.160 50 1.60 ~2.00 − 56 +0.220 +0.100 1.20 ~1.60 20.0 11.1 230~260 63×32 63 32 50 − 63 20.0 11.1 260~290 70×36 70 36 56 − 70 22.0 13.1 290~330 80×40 80 40 63 2.50 ~3.00 − 80 2.00 ~2.50 25.0 14.1 330~380 90×45 90 0 − 0.087 45 70 − 90 +0.260 +0.120 28.0 16.1 380~440 100×50 100 50 80 − 100 31.0 18.1 440~500 GeneralTechnical Information Machine Keys and Key Grooves
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