Seiko Instruments Inc. Precision Machinery Division

SEIKO

Machine Tools Internal Grinder Products

Centerless type SIG03α/SG03α-IR

High-precision, high-efficiency internal grinder, enabling up to outer diameters of 100 mm

eco productsCenterless Type Internal Grinder/Cylindrical Grinder SIG03α/SG03α-IR

Features

  • Compact, powerful, and rigid hydraulic guide
  • Wide choice of workheads enables a broad range of grinding up to outer diameters of 100 mm.
  1. Grinding Specifications
    (Grindable Diameter)
  2. Inside of Machine
  3. Grinding Examples
  4. Machine Dimensions

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Grinding Specifications

  2 roll 1 shoe workhead 2 shoe 1 magnet workhead
LA/LB MGA/MGB IR
Outer diameter φ16~60mm φ30~62mm φ25~90mm
Inner diameter φ12~50mm φ5~56mm φ20~86
Width Max50mm Max30mm 5~30mm

SIG03α 2 shoe1 magnet

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Inside of Machine

SIG03α-MAG workhead
(2 shoe 1 magnet)
SIG03α-MGB workhead
(2 shoe 1 magnet)
SIG03α-MAG workhead SIG03α-MGB workhead

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Grinding Examples

Machine type MGA MGB
Workhead type 2 shoe
1 magnet
2 shoe
1 magnet
Method of grinding Plunge
Grinding
Reciprocate Grinding
Work Diameter 2 shoe 1 magnet Plunge Grinding 2 shoe 1 magnet Reciprocate Grinding
Material SUJ2
Hardness HRC60 to 64
Stock removal Φ0.28±0.08mm Φ0.21±0.07mm
Grinding
accuracy
Size variation R=5µm(without constant size) R=2.5µm(with constant size)
Roundness
(O.D.roundness+)
-0.05 to +0.38µm 0.25 to +0.43µm
Roughness Ra 0.270 to 0.329µm Ra 0.211 to 0.256µm
Cylindricity - Max 2.0µm
Concentricity 0.31 to 0.76µm 0.26 to 0.69µm
Straightness - Wt 0.174 to 0.417µm
R Shape Wt 0.245 to 0.597µm -
Cycle Time 12.5sec 10.2sec

 

*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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SII Green Products

SII Green Products

[SIG03α is authorized as a SII Green Products.]

In December 2001, SII introduced the SII Green Product Label System, which is equivalent to the ISO 14021 Type II environmental label. This aims to raise public awareness of our eco-friendly products.

View the detail of SII Green Products.

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