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PosiLoc True Position Retainers with & without Backing Plates

Dayton Progress

PosiLoc True Position Retainer
Patent Pending.

PosiLoc® True Position® retainers guarantee true dimensional accuracy.

Dayton's PosiLoc® Positive Locking Mechanism is designed to eliminate "ball bouncing" in retainers. Bouncing can occur in ball lock retainers because of the impact generated from the new high strength steels—even when heavy-duty springs are used. The bounce typically does not affect the stamping operation at normal levels. However, in high-demand punching—especially when high strength, lighter weight steels are used—bouncing can have a negative effect on punching accuracy and tool life. The Dayton PosiLoc® locking feature is a modification to existing Dayton True Position® Retainers. It prevents the bounce with the help of an adjustable angled setscrew to create a positive lock against the punch by "locking" the retainer ball in position. Dayton Ball Lock Retainers with the PosiLoc® feature also allow punch replacement without disassembly of the die, thus making tool changeover quick and easy.

backing plugBacking Plugs

The hardened backing plug acts as a head on the punch much like press fit punches, but actually produces more support for the load than a press fit punch of the same size. The backing plug is precision ground with the in-line dowel accurately located on the centerline of the punch.

backing plateBacking Plates

The hardened backing plate has the same function as the backing plug. That is to prevent the punch from sinking into the upper die on impact. Backing plates spread the load over a larger area for very demanding applications where extreme pressures are being exerted and you are looking for extra insurance to minimize sinking into the upper die.


Ordering Information

Retainer sets include:

  • Ball
  • Spring
  • Screws
  • Dowels
  • Ball Release Set Screw
  • PosiLoc Screw

 

How to Order
Specify: Quantity Code D
Example: 23 HRTBL 37
  13 BRTL 25

 

Inch

Back Plug Back Plate Code D A B G K R S U X Y Screw Size
 
HRTL HRTBL 37 .3750 1.75 1.72 .438 .750 .38 .47 1.060 .354 .295 5/16-18
HRTL HRTBL 50 .5000 2.00 1.97 .562 .750 .50 .60 1.180 .472 .256 3/8-16
HRTL HRTBL 62 .6250 2.12 2.09 .625 .750 .56 .66 1.250 .532 .236 3/8-16
HRTL HRTBL 75 .7500 2.38 2.34 .688 .750 .69 .79 1.320 .650 .197 3/8-16
HRTL HRTBL 87 .8750 2.50 2.47 .688 .750 .75 .85 1.400 .728 .197 3/8-16
HRTL HRTBL 100 1.0000 2.75 2.72 .781 .938 .88 .97 1.600 .866 .276 1/2-13
HRTL HRTBL 125 1.2500 2.75 2.72 .781 .938 .88 .97 1.600 .866 .276 1/2-13

Diagram

Metric

Back Plug Back Plate Code D A B G K R S U X Y Screw Size
 
BRTL BRTBL 10 10.00 44.5 43.7 11.1 19.0 9.5 12.0 26.925 9.0 7.5 M8
BRTL BRTBL 13 13.00 50.8 50.0 14.3 19.0 12.7 15.2 29.970 12.0 6.5 M8
BRTL BRTBL 16 16.00 54.0 53.2 15.9 19.0 14.3 16.8 31.750 13.5 6.0 M8
BRTL BRTBL 20 20.00 60.3 59.5 17.5 19.0 17.5 20.0 33.530 16.5 5.0 M10
BRTL BRTBL 25 25.00 69.9 69.1 19.8 23.8 22.2 24.7 40.640 22.0 7.0 M12
BRTL BRTBL 32 32.00 69.9 69.1 19.8 23.8 22.2 24.7 40.640 22.0 7.0 M12
BRTL BRTBL 40 40.00 77.4 76.6 24.0 27.0 26.0 28.5 43.993 26.0 10.0 M12

 

BRTBL conforms to the NAAMS™ Standard for Ball Lock Punch Retainers.

Diagram