Stone Lapping Unit for Ball Grooves of Hub Unit Ball Bearings

for outer ring grooves of double row angular contact ball bearings (continuous and simultaneou machining of double ball grooves by variable oscillation aixs)

Standard Machining range :
Min. groove dia. 66 x Min. ID 58 x Breadth 20 - 60 mm,
Groove R 4 - 10 mm, Contact Angle 0 - 40°

BSFJ-07 PATENTED

Application

1) Double-row angular ball bearing hub unit

Main Features

  • Can be easily installed either horizontally or vertically on general-purpose machines such as like NC lathes, allowing for greater freedom of use
  • Adoption of parallel linkage creates an oscillation center at a remote point, realizing circular oscillation by using that point as the oscillating center of the workpiece. This eliminates the need for a mechanical axis center the workpiece oscillation center, and arms with large inertia are also not necessary.
  • A rigid parallel linkage mechanism is used, and accuracy and efficiency are further improved by combining arc movement with 800 FPM oscillation. Oscillation angle, oscillation angle center conversion angle, and oscillation frequency can be easily set using the touch screen. Grindstone pressurization is controlled by an electropneumatic regulator, which also allows the conditions for multi-step rough and finish machining to be set, further improving accuracy and efficiency.
  • Equipped with special bearings to extend the life of the unit, with special rubber seals to prevent coolant from infiltrating into bearings at joint sections due to falling abrasive grains
  • Continuous, simultaneous machining of double-ball grooves has achieved a drastic reduction in machining time
  • Use of CBN SH grindstones (produced by Mizuho), with durability approx. 20 times longer than conventional stones, for reduction in falling abrasive grains. An auto-slide stone head with a 17mm grindstone pressure stroke applied in combination with these grindstones makes continuous operation for long hours feasible.

Work piece: Double-row angular ball bearing hub unit

Machine Specifications

1) Work piece

Double row angular contact ball bearing, Hub Unit O.D.

(Continuous simultaneous machining of double ball grooves by variable oscillation axis)
2) Machining range
Minimum groove diameter 66 mm
Minimum I.D. 58 mm
Groove R 4 - 10 mm
Width 20 - 60 mm
Contact angle 0° - 40°
3) Oscillation unit
Oscillation frequency Max. 800 fpm
Automatic multi-step change-over
Oscillation angle ±10°(±15°, ±20°Optional setting available)
Changeable angle of oscillation center +45° - -45°
Oscillation drive motor AC servomotor
4) Stone head unit
Automatic slide stone head, Pneumatic drive
Stone pressurization Electropneumatic regulator control,
Automatic multi-step change-over
Stone pressure stroke 17 mm
Stone size
Width 5 - 10.5 mm
Crossover 3 - 6 mm
5) Machine size
(W)440×(D)180×(H)240 mm
6) Unit weight
18 Kg

Note : Specifications are subject to change without notice.