Jaw Pull-down Chucking in the quarter of century.

In 1977, we developed jaw pull-down type PA for the durable and the performance improvement of conventional small size I.D. collet chucks, and in 1980 developed OPA for the finish processing of O.D. clamping workpieces. Since then, we are trying to develop the new-type jaw pull-down Design Chucks and propose to select our various jaw pull down formula design [e.g. the latest OPA-Swing Chucks and the Micro OPA etc.]

STANDARD SERIES

NEW FUNCTION

NEW TYPE

SPECIAL

PA(I.D.)

OPA(O.D.)

OPN(O.D.)

(Soft-Jaw)

OPA-SWING

Micro-OPA

Combination

PA PIN-ARBOR Chucks

　　● I.D. Chucking

■ Securely draws the workpiece into the

    stopper and accurately clamps it without

    horizontal deviations.

■ Offers as high as 0.01 TIR of chucking

     repeatability.

■ Is best suited for auto-loaders because

    of the large unclamping motion.

■ Enhances the cutting force withpower-     ful ID chucking.

◆ please refer to ......　　　　 　　　

OPA PIN-ARBOR Chucks

　● O.D. Chucking　

■ Securely draws the workpiece into the st-

    opper and accurately clamps it  without  h-

    orizontal deviations.

■ Offers as high as 0.01 TIR of chucking rep-

    eatability and a long operating life.

■ Is best suited for secondary machining that 

    requires high accuracy.

■ Ensures excellent durability without allowi-

    ng the entry of chips.

■ Provides high levels of adaptability to high-

   speed operations.

OPA-60・80・100・140・180・230(Clamping Dia.)

SPECIAL

◆ please refer to ......        

OPN PIN-ARBOR Chucks

● O.D. Chucking / Blank Soft Jaw 　PAT.

Excellent form for jaws mounting.

Employing the Grip-&-Draw mechanism, OPN power chuck allows efficient control of workpiece parallelism and thickness. In addition, the jaws feature excellent repeatability and inter-changeability. And the jaws formed by customers according to specific procedures can be mounted to any of the same size OPN chucks with high concentricity.

◆ please refer to ......   　

OPN-５・６・８・10・12

　NEW FUNCTION　                        

                 ● High-Precision Skip-Over Clamping Function

SWING-OPA

SWING PIN-ARBOR CHUCKS　　　　　                                         　PAT.P.　　　　　　　　　　　　

Skip-Over Clamping

      for Irregular-Diameter Workpieces.

OPA-Swing Chuck is designed to grip irregular-diameter workpieces in large-volume production. This new chuck employs a swing-clamping function in jaws of the high-precision draw-clamping-type OD Pin Arbor (OPA) chuck, so that it can skip over the larger-diameter end face of workpiece and hold the proper smaller-diameter gripping area accurately.

The entire chuck design including the swing direction and angles can be determined according to individual workpiece and operating conditions. Also, not only skip-over clamping, but also side-insertion of workpiece is possible, allowing a wide range of selection for automatic workpiece loading.

　ＮＥＷ TYPE

MICRO-OPA 
［Precision PIN-ARBOR Chucks］ 　  　　●Built-in Air Cylinder

Small size PIN-ARBOR Chucks

     with built-in air cylinder

         for precise turning processing !

■ With the built-in air cylinder, concentricity become less

    than 0.005 TIR of chucking repeatability.

■ Securely draws the workpiece into the stopper and acc-

    urately clamps it without horizontal deviations.

■ Extremely suitable for high-speed turn because of light-

    weight jaw and supported by chuck body.

■ MICRO-OPA is designed based on user needs and deliv-

    ered as the finished good. So the customer will be able

    to use MICRO-OPA reliably.

                                                  ◆ please refer to ......

ＳＰＥＣＩＡＬPIN-ARBOR Designs

A Broad Range 

     of Selection

Pin-arbor chucks have exce-llent chucking function, but only in the standard specifica-tion available workpieces to manufacturing are limited .

We have been developing vari-ous special pin arbor applicat-ion designs to the request of the high risk from the customer.

Suitable for finishing process of the pipe-shape workpieces.

The air compressor parts to process by clamping a hole with five equal angles.

OPA & Finger Jaw

OPA & Face Clamp

After centering periphery of thin workpiece lightly by OPA, clamping surface of it's flange by finger jaws.

The 6 jaw OPA /Centering softly by three jaws and Face-clamping by another three jaws.

The 2nd processing of  knuckle back. After chucking finished O.D. by OPA, finger-clamping the surface for safety.