(double station machine) PATENTED
Fully Automatic Infeed Type Centerless Stone Lapping Machine

for end face of seat suction (inner and outer face), valve delivery, T- shape shaft (both faces), shaft with flanges for fluid dynamic bearing of HDD and so on

Standard application range : OD 3 - 20 mm x Breadth 1 - 30 mm

STK-20FSDM

Main Features

  • Capable of stone lapping on end surfaces of small-diameter workpieces such as injector parts and fluid dynamic bearings
  • Compact centerless stone lapping machine for flat ends
  • Unique air bearing mechanism is employed at the grindstone pressure slide guides. Enables ultra-low-pressure cutting with nanometer-level accuracy and near zero resistance due to slide friction. (Linear guide type also available for workpieces with comparatively high grinding resistance.)
  • Stone lapping machine capable of finishing end surfaces of cylindrical or tapered rollers after forging or grinding to a flat surface. The machined surface can also be finished with cross-hatch or concentric patterns.
  • Two-roller & one-shoe support system provides good parallelism and squareness against the mounting reference plane
  • An optional in-process gauging device allows for easy automatic dimension management

Machine Specifications

1) Machining range
O.D. 3 - 20 mm
Width Max. 30 mm
2) Work piece support system
Two rolls,One shoe centerless support system
3) Work pieces driving part
Roller O.D. 75 or 80 mm
Roller Revolution 1,000 rpm (Max.)
Automatic multi-step change-over
Roller speed of a lap 753 m/min. (Max.)
Drive Motor AC servomotor
4) Stone head
Wheel spindle speed 11,250 rpm (Max.)
Wheel O.D. 30 mm (Max.)
Effective pressure applied area 1.22 or 2.00 cm²
Pressure stroke 25 mm Pneumatic drive
Approach stroke 25 mm
Pressure cycle Rough/Finish multi-step change-over
Stone spindle drive motor AC servomotor
5) Machine size
(W)980×(D)1,390×(H)1,920 mm
6) Machine weight
2,000 Kg

Note : Specifications are subject to change without notice.