Seiko Instruments Inc. Precision Machinery Division

SEIKO

Machine Tools Internal Grinder Products

Centerless type SG1-IR

Cylindrical grinder for inner ring grooves, equipped with a proprietary dynamic-pressure bearing and a high-speed loader

Centerless Type Cylindrical Grinder SG1-IR

Features

  • Grinding wheel spindle equipped with a non-circle, one-side-wedge dynamic pressure bearing
  • High-speed loader equipped with AC servomotor and cam
  1. Grinding Specifications (Grindable Diameter)
  2. Inside of Machine
  3. Grinding Examples
  4. Machine Dimensions

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Grinding Specifications

Workhead type 2 shoe centerless
both side drive
Min. Max.
Outer diameter φ2 φ12.5
Width 1 7
Groove radius - 3

SG1-IR 2 Shoe both side drive

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Inside of Machine

2 shoe centerless both side drive

2 shoe centerless both side drive

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Grinding Examples

Machine type SG1-IR
Workhead type 2 shoe centerless
both side drive
Method of grinding Plunge Grinding
Work Diameter work dimension
Material SUJ2
Hardness HRC58 to 62
Stock removal φ0.15mm
Grinding
accuracy
Size
variation
within R=4µm
(without constant size)
Roundness
(O.D.roundness+)
within 0.3µm
Roughness within Ra 0.3µm
Concentricity within 1µm
R Shape within WRt 0.5µm
Parallelism
datum
face of
groove
within 5.0µm
Cycle
Time
within 5.5sec

 

*The above is a part of the grinding example.
To contact us various components also except bearing.

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Machine Dimensions

Machine Dimensions

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