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BRA - Aluminium Ball Retainer
Aluminium Body Retainer + Steel Balls
This is bronze alloy based material, on which the rollers are arranged orderly in certain angle and intervals.
Moreover, the retaining technique is improved that dropping of the rollers can be thoroughly prevented.
The friction is low and can move freely both in redial and in axial directions, and the bearing is in high
precision. This is a young generation of the roller bearing which can roll in high speed, and is used in
rolling frane of cold impact moulds, high precision machine tools and their accessories.
The steel ball array is mainly divided into two categories: spiral array and straight line array.
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Features
1. Low Coef Friction
2. Long life span
3. High movement accuracy
4. Be Proper for straight line and spiral movement
5. Fast Movement |
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Typical Applications
SB-BRA ball retainer is a new generation replacement of guide pin bush. With high speed movement, this is mainly used in high precision punching
tool, high precision machine tool, etc.
Technical Reference
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Max Load Capacity
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30 N/mm2
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Shrink Fit
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0.01 mm ~ 0.02mm
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Max Sliding Speed
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6 m/s
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Coef Friction
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0.01 ~ 0.08 μ
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Rolling Diameter Deviation
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< 0.002 mm
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Components' Material Specifications
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1.Duid Tube:
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MATERIAL: GCR15 HARDNESS: HRC 62-66
MEASUREMENT: USING TRADITIONAL MEASUREMENT METHOD
(O.D.MICROMETER CALIPER, I.D. MICROMETER CALIPER) TO
MEASURE HOUSING BORE Dh, SHAFT DIAMETER AND STEEL
BALL DIAMETER d , REQUESTING df+2d -Dh=0.01-0.02mm
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2. Shaft:
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MATERIAL: GCr 15 HARDNESS: HRC 62-66 SHAFT DIAMETER
TOLERANCE: h5.
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3. Steel Ball:
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MATERIAL: GCr 15 HARDNESS: HRC 62-66 STEEL BALL
OUTSIDE DIAMETER TOLERANCE: +0.001/-0.001mm
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Steel Ball Array
| SPIRAL ARRAY |
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STRAIGHT LINE ARRAY |
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Other Ball Retainer Bearings
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