| GR,GD series |
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Screw shaft diameter Φ 5 ~ Φ 125, Accuracy grade C0~C10
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Customized ground ball screws of single nut type, integral nut type and double nut type using tube method (GR series) and deflector method (GD series) with a range of small diameter (Φ5) to large diameter (Φ125) are available.
Moreover, those of JIS C0 to C10 grade accuracy can be manufactured. |
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Availability of Customized Ball Screw Range |
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The range of screw shafts that can be manufactured to meet each accuracy grade of customized ground ball screws is shown below:
When the slenderness ratio (shaft length per shaft diameter) is large, it is sometimes difficult to manufacture a ball screw with the desired accuracy.
The following table shows the maximum length of screw shafts of each accuracy grade that can be manufactured in the standard process. When ball screws exceeding the manufacturable range are required, contact KURODA. |
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| Manufacturable range of screw shaft length |
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C0
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C1
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C2
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C3
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C4
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C5
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C7
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C10
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Φ5
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90
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120
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120
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140
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140
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140
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–
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–
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Φ6
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160
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180
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180
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210
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210
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210
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–
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–
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Φ8
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240
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280
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280
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340
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340
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340
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340
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–
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Φ10
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340
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400
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400
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480
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480
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500
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500
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–
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Φ12
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420
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500
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500
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600
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600
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700
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700
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–
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Φ15
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500
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600
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600
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700
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800
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1500
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1500
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1500
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Φ16
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500
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600
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600
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700
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800
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1500
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1500
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1500
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Φ20
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800
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900
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1100
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1400
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1400
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2000
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2000
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2000
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Φ25
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1100
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1300
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1600
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1800
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1800
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2000
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2300
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2300
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Φ28
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1200
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1500
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1800
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2000
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2000
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2200
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2600
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2600
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Φ32
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1600
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1800
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2200
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2500
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2500
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2800
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3200
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3600
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Φ36
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1800
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2000
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2500
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2800
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2800
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3100
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3600
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4000
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Φ40
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2000
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2200
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2800
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3200
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3200
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3600
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4600
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4600
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Φ45
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2000
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2300
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3000
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3600
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3600
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4100
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5000
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5200
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Φ50
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2000
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2800
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3600
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4000
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4000
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4500
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5500
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5500
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Φ55
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2000
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3000
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4000
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5000
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5000
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5500
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5500
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5500
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Φ63
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2000
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3000
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4500
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5200
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5200
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5500
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5500
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5500
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Φ70
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–
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3000
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4500
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5500
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5500
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5500
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5500
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5500
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Φ80
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–
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3000
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4500
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5500
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5500
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5500
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5500
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5500
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Φ100
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–
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3000
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4500
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5500
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5500
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5500
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5500
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5500
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Φ125
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–
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3000
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4500
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5500
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5500
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5500
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5500
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5500
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| When the lead is larger than the screw shaft diameter, the manufacturable accuracy grade is C2~C10. |
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