Centerless Stone Lapping Machine

for inner and outer ring raceway of four-point contact (gothic arc groove), single-row deep groove and angular contact ball bearings, and doubel-row angular ball bearings

Standard application range :
- Outer ring : OD 300 - 600 mm x Breadth 20 - 110 mm x Raceway Curvature R to 40 mm
- Inner ring : OD 220 - 500 mm x Breadth 20 - 110 mm x Raceway Curvature R to 40 mm

STK-600WT-C-NC

Application

1) Deep Groove Ball Bearing

2) Angular ball bearing

Main Features

  • Centerless stone lapping machine for inner and outer ring raceways of ball bearings
  • One-cycle automatic machining; manual inner and outer ring machine for workpiece mounting and removal. Infeed machining with plunge grinding. Outer and inner diameter roller centerless support system.
  • The servomotor is driven with the latest control program, and oscillating stone head oscillates moves in smooth, sine-like curves. Backlash caused by conventional cam-type machines has been eliminated, and vibration has been minimized even at the high-frequency oscillation, achieving high-precision stone lapping.
  • Indexing of precise oscillation angles allows machining of gothic arc grooves with high precision, something which has been difficult until now

Work piece: Ball Bearing Inner Ring

Machine Specifications

1) Machining range
Outer ring O.D. 300 - 600 mm × Work width 20 - 110 mm
Inner ring O.D. 220 - 500 mm×I.D. 200 - 450 mm×Work breadth 20 - 110 mm
2) Work piece support system
O.D. roller centerless support system (Outer ring),
I.D. roller centerless support system (Inner ring)
3) Oscillation unit part
Oscillation unit
Oscillation frequency Max. 400 fpm (at ±10°)
Automatic multi-step change-over
Oscillation angle 0 - 30°(±15°)
Drive Motor AC servomotor
Tool in/out slide unit
Stroke 200 mm
Drive Motor AC servomotor
4) Stone head unit part
Auto-slide system
Stone pressurization system Electropneumatic regulator,
Automatic multi-step change-over
5) Pressure roller unit part
Stroke 40 mm (hydraulic drive)
Adjustment amount
in diameter direction		 110 mm (Motor drive)
 
Adjustment amount
in width direction		 190 mm (Motor drive)
 
6) Bore reference unit
Stroke 130 mm (hydraulic drive)
Adjustment amount
in width direction		 305 mm Motor drive
 
7) Centralized lubrication pump unit
SKF make
Tank capacity 2.7 L
Motor AC23W 2P
8) Machine size
(W)2,000× (D)2,020× (H)2,100 mm
9) Machine weight
7,500 Kg

Note : Specifications are subject to change without notice.