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About Shaft Collars
Shaft collars are useful for holding and positioning components on a shaft. They can also serve as mechanical stops and stroke limiters.
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Flange-Mount Shaft Collars
Three tapped counterbored holes and three unthreaded holes provide mounting flexibility. Collars clamp evenly around the shaft to create a strong, mar-free hold. To use, slide onto your shaft and tighten the clamping screws to secure.
Collars with keyway have a standard ANSI keyway for use with keyed shafts, keys, and key stock.
Black-oxide steel collars are stronger than aluminum and stainless steel collars. They have some corrosion resistance. Aluminum collars are lightweight and have good corrosion resistance. 303 stainless steel collars have excellent corrosion resistance.
Optional flange extensions extend the flange OD of the collars to handle larger components. All are machinable and weldable.
For technical drawings and 3-D models, click on a part number.
Inch
Flange | Keyway | Clamping Screw | Counterbored Mounting Holes | Unthreaded Mounting Holes | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | OD | Wd. | OD | Thick. | Wd. | Dp. | Type | No. Included | Mounting Fasteners Included | Thread Size | No. of | Dia. | No. of | Each | |
Black-Oxide 1117 Carbon Steel | |||||||||||||||
| 1/4" | 13/16" | 5/8" | 1 15/32" | 1/4" | __ | __ | Socket Head Screw | 2 | No | 4-40 | 3 | 1/8" | 3 | 0000000 | 000000 |
| 3/8" | 1 1/16" | 11/16" | 1 23/32" | 1/4" | 3/32" | 1/16" | Socket Head Screw | 2 | No | 6-32 | 3 | 5/32" | 3 | 0000000 | 00000 |
| 1/2" | 1 1/4" | 3/4" | 2 7/32" | 9/32" | 1/8" | 1/16" | Socket Head Screw | 2 | No | 8-32 | 3 | 5/32" | 3 | 000000 | 00000 |
| 5/8" | 1 1/2" | 13/16" | 2 19/32" | 5/16" | 3/16" | 5/64" | Socket Head Screw | 2 | No | 10-24 | 3 | 3/16" | 3 | 000000 | 00000 |
| 3/4" | 1 3/4" | 1" | 2 31/32" | 13/32" | 3/16" | 5/64" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 000000 | 00000 |
| 1" | 2" | 1" | 3 7/32" | 13/32" | 1/4" | 1/8" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 000000 | 00000 |
| 1 1/8" | 2 1/8" | 1" | 3 7/32" | 13/32" | 1/4" | 1/8" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 00000 |
| 1 1/4" | 2 1/4" | 1" | 3 15/32" | 13/32" | 1/4" | 1/8" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 000000 | 00000 |
| 1 3/8" | 2 3/8" | 1" | 3 19/32" | 13/32" | 5/16" | 5/64" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 00000 |
| 1 1/2" | 2 1/2" | 1" | 3 23/32" | 13/32" | 3/8" | 5/32" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 000000 | 00000 |
| 1 3/4" | 3" | 1 1/4" | 3 31/32" | 1/2" | 3/8" | 11/64" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 00000 |
| 1 15/16" | 3 1/4" | 1 1/4" | 4 23/32" | 1/2" | 1/2" | 7/32" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 2" | 3 1/4" | 1 1/4" | 4 23/32" | 1/2" | 1/2" | 7/32" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 2 3/16" | 3 1/2" | 1 1/4" | 4 31/32" | 1/2" | 1/2" | 7/32" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 2 1/4" | 3 1/2" | 1 1/4" | 4 31/32" | 1/2" | 1/2" | 3/16" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 2 7/16" | 4" | 1 3/8" | 5 23/32" | 1/2" | 5/8" | 9/32" | Socket Head Screw | 2 | No | 3/8"-16 | 3 | 3/8" | 3 | 0000000 | 000000 |
| 2 1/2" | 4" | 1 3/8" | 5 23/32" | 1/2" | 5/8" | 9/32" | Socket Head Screw | 2 | No | 3/8"-16 | 3 | 3/8" | 3 | 0000000 | 000000 |
| 3" | 4 1/2" | 1 3/8" | 6 11/32" | 1/2" | 3/4" | 11/32" | Socket Head Screw | 2 | No | 3/8"-16 | 3 | 3/8" | 3 | 0000000 | 000000 |
2024 Aluminum | |||||||||||||||
| 1/4" | 13/16" | 5/8" | 1 15/32" | 1/4" | __ | __ | Socket Head Screw | 2 | No | 4-40 | 3 | 1/8" | 3 | 0000000 | 00000 |
| 3/8" | 1 1/16" | 11/16" | 1 23/32" | 1/4" | 3/32" | 1/16" | Socket Head Screw | 2 | No | 6-32 | 3 | 5/32" | 3 | 0000000 | 00000 |
| 1/2" | 1 1/4" | 3/4" | 2 7/32" | 9/32" | 1/8" | 1/16" | Socket Head Screw | 2 | No | 8-32 | 3 | 5/32" | 3 | 0000000 | 00000 |
| 5/8" | 1 1/2" | 13/16" | 2 19/32" | 5/16" | 3/16" | 5/64" | Socket Head Screw | 2 | No | 10-24 | 3 | 3/16" | 3 | 0000000 | 00000 |
| 3/4" | 1 3/4" | 1" | 2 31/32" | 13/32" | 3/16" | 5/64" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 00000 |
| 1" | 2" | 1" | 3 7/32" | 13/32" | 1/4" | 1/8" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 00000 |
| 1 1/8" | 2 1/8" | 1" | 3 7/32" | 13/32" | 1/4" | 1/8" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 00000 |
| 1 1/4" | 2 1/4" | 1" | 3 15/32" | 13/32" | 1/4" | 1/8" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 00000 |
| 1 3/8" | 2 3/8" | 1" | 3 19/32" | 13/32" | 5/16" | 5/64" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 00000 |
| 1 1/2" | 2 1/2" | 1" | 3 23/32" | 13/32" | 3/8" | 5/32" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 000000 |
| 1 3/4" | 3" | 1 1/4" | 3 31/32" | 1/2" | 3/8" | 11/64" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 1 15/16" | 3 1/4" | 1 1/4" | 4 23/32" | 1/2" | 1/2" | 7/32" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 2" | 3 1/4" | 1 1/4" | 4 23/32" | 1/2" | 1/2" | 7/32" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 2 3/16" | 3 1/2" | 1 1/4" | 4 31/32" | 1/2" | 1/2" | 7/32" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 2 1/4" | 3 1/2" | 1 1/4" | 4 31/32" | 1/2" | 1/2" | 3/16" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 2 7/16" | 4" | 1 3/8" | 5 23/32" | 1/2" | 5/8" | 9/32" | Socket Head Screw | 2 | No | 3/8"-16 | 3 | 3/8" | 3 | 0000000 | 000000 |
| 2 1/2" | 4" | 1 3/8" | 5 23/32" | 1/2" | 5/8" | 9/32" | Socket Head Screw | 2 | No | 3/8"-16 | 3 | 3/8" | 3 | 0000000 | 000000 |
| 3" | 4 1/2" | 1 3/8" | 6 11/32" | 1/2" | 3/4" | 11/32" | Socket Head Screw | 2 | No | 3/8"-16 | 3 | 3/8" | 3 | 0000000 | 000000 |
303 Stainless Steel | |||||||||||||||
| 1/4" | 13/16" | 5/8" | 1 15/32" | 1/4" | __ | __ | Socket Head Screw | 2 | No | 4-40 | 3 | 1/8" | 3 | 0000000 | 00000 |
| 3/8" | 1 1/16" | 11/16" | 1 23/32" | 1/4" | 3/32" | 1/16" | Socket Head Screw | 2 | No | 6-32 | 3 | 5/32" | 3 | 0000000 | 00000 |
| 1/2" | 1 1/4" | 3/4" | 2 7/32" | 9/32" | 1/8" | 1/16" | Socket Head Screw | 2 | No | 8-32 | 3 | 5/32" | 3 | 0000000 | 00000 |
| 5/8" | 1 1/2" | 13/16" | 2 19/32" | 5/16" | 3/16" | 5/64" | Socket Head Screw | 2 | No | 10-24 | 3 | 3/16" | 3 | 0000000 | 00000 |
| 3/4" | 1 3/4" | 1" | 2 31/32" | 13/32" | 3/16" | 5/64" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 000000 |
| 1" | 2" | 1" | 3 7/32" | 13/32" | 1/4" | 1/8" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 000000 |
| 1 1/8" | 2 1/8" | 1" | 3 7/32" | 13/32" | 1/4" | 1/8" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 000000 |
| 1 1/4" | 2 1/4" | 1" | 3 15/32" | 13/32" | 1/4" | 1/8" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 000000 |
| 1 3/8" | 2 3/8" | 1" | 3 19/32" | 13/32" | 5/16" | 5/64" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 000000 |
| 1 1/2" | 2 1/2" | 1" | 3 23/32" | 13/32" | 3/8" | 5/32" | Socket Head Screw | 2 | No | 1/4"-20 | 3 | 1/4" | 3 | 0000000 | 000000 |
| 1 3/4" | 3" | 1 1/4" | 3 31/32" | 1/2" | 3/8" | 11/64" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 1 15/16" | 3 1/4" | 1 1/4" | 4 23/32" | 1/2" | 1/2" | 7/32" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 2" | 3 1/4" | 1 1/4" | 4 23/32" | 1/2" | 1/2" | 7/32" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 2 3/16" | 3 1/2" | 1 1/4" | 4 31/32" | 1/2" | 1/2" | 7/32" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 2 1/4" | 3 1/2" | 1 1/4" | 4 31/32" | 1/2" | 1/2" | 3/16" | Socket Head Screw | 2 | No | 5/16"-18 | 3 | 5/16" | 3 | 0000000 | 000000 |
| 2 7/16" | 4" | 1 3/8" | 5 23/32" | 1/2" | 5/8" | 9/32" | Socket Head Screw | 2 | No | 3/8"-16 | 3 | 3/8" | 3 | 0000000 | 000000 |
| 2 1/2" | 4" | 1 3/8" | 5 23/32" | 1/2" | 5/8" | 9/32" | Socket Head Screw | 2 | No | 3/8"-16 | 3 | 3/8" | 3 | 0000000 | 000000 |
| 3" | 4 1/2" | 1 3/8" | 6 11/32" | 1/2" | 3/4" | 11/32" | Socket Head Screw | 2 | No | 3/8"-16 | 3 | 3/8" | 3 | 0000000 | 000000 |
Metric
Flange | Keyway | Clamping Screw | Counterbored Mounting Holes | Unthreaded Mounting Holes | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia., mm | OD, mm | Wd., mm | OD, mm | Thick., mm | Wd., mm | Dp., mm | Type | No. Included | Mounting Fasteners Included | Thread Size | Thread Pitch, mm | No. of | Dia., mm | No. of | Each | |
Black-Oxide 1117 Carbon Steel | ||||||||||||||||
| 6 | 16 | 19 | 38 | 6.9 | __ | __ | Socket Head Screw | 2 | No | M3 | 0.5 | 3 | 3 | 3 | 0000000 | 000000 |
| 8 | 18 | 19 | 41 | 6.9 | 2 | 1 | Socket Head Screw | 2 | No | M3 | 0.5 | 3 | 3 | 3 | 0000000 | 00000 |
| 10 | 24 | 19 | 45 | 6.9 | 3 | 1.4 | Socket Head Screw | 2 | No | M3 | 0.5 | 3 | 3 | 3 | 0000000 | 00000 |
| 12 | 28 | 19 | 55 | 6.9 | 4 | 1.8 | Socket Head Screw | 2 | No | M4 | 0.7 | 3 | 4 | 3 | 0000000 | 00000 |
| 16 | 34 | 20.6 | 63 | 6.9 | 5 | 2.3 | Socket Head Screw | 2 | No | M5 | 0.8 | 3 | 5.4 | 3 | 0000000 | 00000 |
| 18 | 36 | 20.64 | 63 | 6.85 | 6 | 2.8 | Socket Head Screw | 2 | No | M5 | 0.8 | 3 | 5.4 | 3 | 0000000 | 00000 |
| 20 | 40 | 25.4 | 69 | 7.9 | 6 | 2.8 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 00000 |
| 25 | 45 | 25.4 | 75 | 7.9 | 8 | 3.3 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 00000 |
| 30 | 54 | 25.4 | 82 | 7.9 | 8 | 3.3 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 00000 |
| 35 | 57 | 25.4 | 88 | 7.9 | 10 | 3.3 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 00000 |
| 40 | 60 | 25.4 | 92 | 7.9 | 12 | 3.3 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 00000 |
| 45 | 73 | 32 | 107 | 13 | 14 | 3.8 | Socket Head Screw | 2 | No | M8 | 1.25 | 3 | 8.4 | 3 | 0000000 | 000000 |
| 50 | 78 | 31.75 | 114 | 12.7 | 14 | 3.8 | Socket Head Screw | 2 | No | M8 | 1.25 | 3 | 8.4 | 3 | 0000000 | 000000 |
2024 Aluminum | ||||||||||||||||
| 6 | 16 | 19 | 38 | 6.9 | __ | __ | Socket Head Screw | 2 | No | M3 | 0.5 | 3 | 3 | 3 | 0000000 | 00000 |
| 8 | 18 | 19 | 41 | 6.9 | 2 | 1 | Socket Head Screw | 2 | No | M3 | 0.5 | 3 | 3 | 3 | 0000000 | 00000 |
| 10 | 24 | 19 | 45 | 6.9 | 3 | 1.4 | Socket Head Screw | 2 | No | M3 | 0.5 | 3 | 3 | 3 | 0000000 | 00000 |
| 12 | 28 | 19 | 55 | 6.9 | 4 | 1.8 | Socket Head Screw | 2 | No | M4 | 0.7 | 3 | 4 | 3 | 0000000 | 00000 |
| 16 | 34 | 20.6 | 63 | 6.9 | 5 | 2.3 | Socket Head Screw | 2 | No | M5 | 0.8 | 3 | 5 | 3 | 0000000 | 00000 |
| 18 | 36 | 20.64 | 63 | 6.85 | 6 | 2.8 | Socket Head Screw | 2 | No | M5 | 0.8 | 3 | 5 | 3 | 0000000 | 00000 |
| 20 | 40 | 25.4 | 69 | 7.9 | 6 | 2.8 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 00000 |
| 25 | 45 | 25.4 | 75 | 7.9 | 8 | 3.3 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 00000 |
| 30 | 54 | 25.4 | 82 | 7.9 | 8 | 3.3 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 00000 |
| 35 | 57 | 25.4 | 88 | 7.9 | 10 | 3.3 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 000000 |
| 40 | 60 | 25.4 | 92 | 7.9 | 12 | 3.3 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 000000 |
| 45 | 73 | 32 | 107 | 13 | 14 | 3.8 | Socket Head Screw | 2 | No | M8 | 1.25 | 3 | 8.4 | 3 | 0000000 | 000000 |
| 50 | 78 | 31.75 | 114 | 12.7 | 14 | 3.8 | Socket Head Screw | 2 | No | M8 | 1.25 | 3 | 8 | 3 | 0000000 | 000000 |
303 Stainless Steel | ||||||||||||||||
| 6 | 16 | 19 | 38 | 6.9 | __ | __ | Socket Head Screw | 2 | No | M3 | 0.5 | 3 | 3 | 3 | 0000000 | 00000 |
| 8 | 18 | 19 | 41 | 6.9 | 2 | 1 | Socket Head Screw | 2 | No | M3 | 0.5 | 3 | 3 | 3 | 0000000 | 00000 |
| 10 | 24 | 19 | 45 | 6.9 | 3 | 1.4 | Socket Head Screw | 2 | No | M3 | 0.5 | 3 | 3 | 3 | 0000000 | 00000 |
| 12 | 28 | 19 | 55 | 6.9 | 4 | 1.8 | Socket Head Screw | 2 | No | M4 | 0.7 | 3 | 4 | 3 | 0000000 | 00000 |
| 16 | 34 | 20.6 | 63 | 6.9 | 5 | 2.3 | Socket Head Screw | 2 | No | M5 | 0.8 | 3 | 5.4 | 3 | 0000000 | 00000 |
| 18 | 36 | 20.64 | 63 | 6.85 | 6 | 2.8 | Socket Head Screw | 2 | No | M5 | 0.8 | 3 | 5.4 | 3 | 0000000 | 00000 |
| 20 | 40 | 25.4 | 69 | 7.9 | 6 | 2.8 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 000000 |
| 25 | 45 | 25.4 | 75 | 7.9 | 8 | 3.3 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 000000 |
| 30 | 54 | 25.4 | 82 | 7.9 | 8 | 3.3 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 000000 |
| 35 | 57 | 25.4 | 88 | 7.9 | 10 | 3.3 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 000000 |
| 40 | 60 | 25.4 | 92 | 7.9 | 12 | 3.3 | Socket Head Screw | 2 | No | M6 | 1 | 3 | 6 | 3 | 0000000 | 000000 |
| 45 | 73 | 32 | 107 | 13 | 14 | 3.8 | Socket Head Screw | 2 | No | M8 | 1.25 | 3 | 8.4 | 3 | 0000000 | 000000 |
| 50 | 78 | 31.75 | 114 | 12.7 | 14 | 3.8 | Socket Head Screw | 2 | No | M8 | 1.25 | 3 | 8.4 | 3 | 0000000 | 000000 |
