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Product – Martin – Sprocket – Catalogue |
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Standard Keyway Dimensions (Metric) |
Shaft Diameter |
Key |
Keyway Width |
Keyway Depth |
Over |
Upto and Inci |
6 |
8 |
2x2 |
2 |
1 |
8 |
10 |
3x3 |
3 |
1.4 |
10 |
12 |
4x4 |
4 |
1.8 |
12 |
17 |
5x5 |
5 |
2.3 |
|
17 |
22 |
6x2 |
6 |
2.8 |
22 |
30 |
8x7 |
8 |
3.3 |
30 |
38 |
10x8 |
10 |
3.3 |
38 |
44 |
12x8 |
12 |
3.3 |
|
44 |
50 |
14x9 |
14 |
3.8 |
50 |
58 |
16x10 |
16 |
4.3 |
58 |
65 |
18x11 |
18 |
4.4 |
65 |
75 |
20x12 |
20 |
4.9 |
|
78 |
85 |
22x14 |
22 |
5.4 |
85 |
95 |
25x14 |
25 |
5.4 |
95 |
110 |
28x16 |
28 |
6.4 |
110 |
130 |
32x18 |
32 |
7.4 |
|
130 |
150 |
36x20 |
36 |
8.4 |
150 |
170 |
40x22 |
40 |
9.4 |
170 |
200 |
45x25 |
45 |
10.4 |
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Bore Tolerances (Metric) |
Stock Metric Bores are machined to a minimum H7 Tolerance |
Standard Keyway Dimension (Imperial)
Shaft Diameter |
Keyway |
Width |
Depth |
½‐⁹⁄₁₆ |
⅛ х¹⁄₆ |
⅛ |
¹⁄₁₆ |
⁵⁄₈₋⁷⁄₈ |
³⁄₁₆ х ³⁄₁₆ |
³⁄₁₆ |
³⁄₃₂ |
¹⁵⁄₁₆⁻1¹⁄₄ |
¼ х ¼ |
¼ |
⅛ |
1⁵⁄₁₆₋1³⁄₈ |
⁵⁄₁₆ х ⁵⁄₁₆ |
⁵⁄₁₆ |
⁵⁄₃₂ |
1⁷⁄₁₆₋1³⁄₄ |
³⁄₈ х ³⁄₆ |
⅜ |
³⁄₁₆ |
1¹³⁄₁₆₋2³⁄₄ |
¹⁄₂ х ¹⁄₂ |
½ |
¼ |
2⁵⁄₁₆₋2³⁄₄ |
⁵⁄₈ х ⁵⁄₈ |
⅚ |
⁵⁄₁₆ |
2¹³⁄₁₆₋3¹⁄₄ |
¾ х ¾ |
¾ |
⅜ |
3⁵⁄₁₆₋3³⁄₄ |
⁷⁄₈ х ⁷⁄₈ |
⅞ |
⁷⁄₁₆ |
3¹³⁄₁₆₋4¹⁄₂ |
1 х 1 |
1 |
½ |
4⁹⁄₁₆₋5¹⁄₂ |
1¼ х 1¼ |
1¼ |
⅝ |
5⁹⁄₁₆₋6¹⁄₂ |
1½ х 1½ |
1½ |
¾ |
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Bore Tolerances (Imperial) |
1 and Less |
+.001-.000 |
1 to 2 |
+.002-.000 |
2 to 3 |
+.003-.000 |
3 & up |
+.004-.000 |
bores with closer tolerances will be |
supplied at a slight increase in price |
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