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OPEN TYPE SUPER BALL BUSHINGS:
PDF Catalogue of Linear Bearings
These ball bushings have the same boundary dimensions as the standard open ball bushings and are usually interchangeable.
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They offer the same advantage of self alignment as the closed type Super Ball Bushings. Because of an additional ball race in the larger size ball bushings, their carrying capacity is slightly increased. The bushing is provided with a retention hole to secure it against displacement.
The load capacity shown in the table is only valid for load applied vertically. If the load is acting in any other direction, the load capacity must be taken from the diagrams shown below. Also available as a corrosion resistant version with electroless nickel coating on the bush and stainless steel balls. Part number SK71n2.. (where .. is the size). |
| Part Number (2 seals) |
d | D | B (±0.2) |
b (h14) |
W | alpha | No of Ball Circuits | Load C (N) |
Load C0 (N) | Weight (kg) | .stp File |
| SK71-212 | 12 | 22 | 32 | 20 | 6.5 | 66 | 4 | 1250 | 1620 | 0.017 |  |
| SK71-216 | 16 | 26 | 36 | 22 | 9 | 68 | 4 | 1560 | 1930 | 0.035 |  |
| SK71-220 | 20 | 32 | 45 | 28 | 9 | 55 | 5 | 2090 | 2630 | 0.048 | |
| SK71-225 | 25 | 40 | 58 | 40 | 11.5 | 57 | 5 | 3070 | 4720 | 0.103 | |
| SK71-230 | 30 | 47 | 68 | 48 | 14 | 57 | 5 | 5470 | 6810 | 0.177 | |
| SK71-240 | 40 | 62 | 80 | 56 | 19.5 | 56 | 5 | 6590 | 8230 | 0.275 | |
| SK71-250 | 50 | 75 | 100 | 72 | 22.5 | 54 | 5 | 10800 | 13500 | 0.520 | |
Load capacity diagram for 12 & 16mm bushes |
Load capacity diagram for 20 to 40mm bushes |
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