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Ball Bushing FAQ

Does DME provide recommended installation hole sizes for the different Ball Bushings offered by DME?

No. DME does not provide recommended installation hole sizes or tolerances for any of the bushings offered, including ball bushings. The mold maker is expected to measure the bushing and machine the installation hole in the plate to suit.

Does the (Thompson Precision Series A) Lineal Type Ball Bushing move or “float” within the floating mold plate?

Yes. This motion is described in the DME Mold Bases and Plates catalog. By way of comparison, the DME Pre-Loaded Type Ball Bushing does not “float” within the floating plate.

I am looking for information on (Thompson Precision Series A) Lineal Type Ball Bushings. Does DME offer this type of bushing?

We offer Lineal Type Ball Bushings for floating plates in X-, AX- and T-Series mold bases as special orders only. The bushings are shown in the DME Mold Bases and Plates catalog. Please contact us for more details.

Note: Due to the larger O.D. of the bushing counter bore required, ball bushings cannot be installed into standard leader pin locating in the mold base assembly.

Is there a recommended load limit and a recommended temperature limit for (DME Precision Grade) Pre-Loaded Type Ball Bushings?

The following maximum load limits apply to the Pre-Loaded Type Ball Bushings:

  • 3/4 inch nominal size ß 200 lbs
  • 1 inch nominal size ß 350 lbs
  • 1-1/4 inch nominal size ß 520 lbs
  • 1-1/2 inch nominal size ß 770 lbs
  • 1-3/4 inch nominal size ß 1000 lbs
  • 2 inch nominal size ß 1100 lbs
  • A maximum temperature limit of 500°F (260°C) applies to the Pre-Loaded Ball Bushing.

Is there a recommended load limit and a recommended temperature limit for (Thompson Precision Series A) Lineal Type Ball Bushings?

The following maximum load limits apply to the Lineal Type Ball Bushings:

  • A-122026 ß 200 lbs
  • A-162536 ß 350 lbs
  • A-203242 ß 520 lbs
  • A-243848 ß 770 lbs
  • A-324864 ß 1100 lbs
  • A maximum temperature limit of 500°F (260°C) applies to the Lineal Type Ball Bushing.


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