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| LINEAR MOTION / Ballscrew Assemblies / End Bearing Supports |
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| END MOUNTING BEARING SUPPORTS |
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| Comptrol saves design time and manufacturing costs by allowing engineers to select from a family of over 200 pre-engineered bearing blocks for standard ballscrews from 5/8" to 3" in diameter, metric ballscrews, lead screws, or other rotating shaft applications. |
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Base
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Cut-Off Flange
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Flange
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Custom
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Each standard size is available in nine mounting/bearing combinations to provide the end support needed to meet the load carrying capacity, speed, stiffness, and design life objectives of the operating system. For the four most common end support configurations (Rigid-Free, Simple-Simple, Rigid-Simple, Rigid-Rigid)
- Base (pillow block), flange, or cut-off flange mounting
- Three standard bearing arrangements (Click Here For More Details)
- Single radial ball bearing (Type A)
- Duplex bidirectional angular contact (Type B)
- Spaced bidirectional angular contact bearings (Type C)
- Dynamic thrust load ratings up to 39,964 lbs.
- Static thrust load ratings up 55,970 lbs.
- Dynamic radial load ratings up to 33,000 lbs.
- Static radial load ratings up to 29,000 lbs.
- Counter-bored & tapped mounting holes for threading into or bolting through housing.
- Made in the U.S.A.
Custom end support mounting configurations and bearing arrangements are available.
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| Nominal Load Ratings for Standard Comptrol Bearing Blocks |
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Screw
Diameter
(in.) |
TYPE A |
TYPE B & C |
Radial Load
Capacity (lbs.) |
Thrust Load
Capacity (lbs.) |
Radial Load
Capacity (lbs.) |
| Static |
Dynamic* |
Static |
Dynamic* |
Static |
Dynamic* |
| 0.625 |
697 |
1,550 |
3,262 |
3,035 |
1,690 |
2,810 |
| 0.750 |
1,210 |
2,560 |
5,288 |
4,925 |
2,740 |
4,560 |
| 1.000 |
1,470 |
2,860 |
7,199 |
5,875 |
3,730 |
5,440 |
| 1.130 |
1,750 |
3,150 |
9,032 |
6,556 |
4,680 |
6,070 |
| 1.500 |
2,520 |
4,380 |
11,059 |
8,381 |
5,730 |
7,760 |
| 2.000 |
4,270 |
6,900 |
19,493 |
12,744 |
10,100 |
11,800 |
| 2.250 |
7,080 |
11,900 |
34,740 |
23,652 |
18,000 |
21,900 |
| 2.500 |
6,520 |
9,800 |
32,617 |
19,224 |
16,900 |
17,800 |
| 3.000 |
11,700 |
18,400 |
55,970 |
35,964 |
29,000 |
33,300 |
* Dynamic Load Ratings based on one million revolutions or 500 hours at 33-1/3 r.p.m. |
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| Standard End Mounting Bearing Supports |
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| Shaft Diameter |
Flange Mount
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Cut-Off
Flange Mount
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Base Mount
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End Journal Dimensions |
| 0.625 |
66-200-XX |
66-300-XX |
66-400-XX |
End Journal Dimensions
(Link to PDF) |
| 0.750 |
66-201-XX |
66-301-XX |
66-401-XX |
| 1.000 |
66-202-XX |
66-302-XX |
66-402-XX |
| 1.130 |
66-203-XX |
66-303-XX |
66-403-XX |
| 1.500 |
66-204-XX |
66-304-XX |
66-404-XX |
| 2.000 |
66-205-XX |
66-305-XX |
66-405-XX |
| 2.250 |
66-206-XX |
66-306-XX |
66-406-XX |
| 2.500 |
66-207-XX |
66-307-XX |
66-407-XX |
| 3.000 |
66-208-XX |
66-308-XX |
66-408-XX |
* Contact us for custom mounting and bearing configurations. |
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