Thursday, March 8, 2012

Back to ball bearings

OK, time to enhance the pump action 20mm cal slingshot crossbow.

I exchanged the part that "pushes" the BB forward, from paracord to steel.

The paracord sometimes slid between barrel and ball, and of course it never lasted long due to the unavoidable chafing.

Also, the bands came into contact with the slide, causing early band breakage.

Now, the bands will never touch anything during "flight". Two wooden blocks  catch the metal rod, which is padded by Thera Tube Silver.

This seem to last looong, I did many shots tonite.

If this works, I may be close to publish blueprints.


9 comments:

  1. Great news Joerg, I'm glad you decided to refine this project.

    ReplyDelete
  2. The best bearings would still be the metal ones. Tested and proven to give the best results.
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  3. This is what I called first class useful maintenance tip here. Really useful. Would come in handy some other time. hydrodynamic bearings


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  4. Lubricants do play an important role for the maintenance of the bearing. It also prolongs its life significantly.
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  5. Lubricants do play an important role for the maintenance of the bearing. It also prolongs its life significantly.

    hydrodynamic bearings

    ReplyDelete
  6. White Metal bearing for diesel engine compressor, pumps, turbines are manufactured according to the design or sample. White Metal Bearings up to 1000 mm are manufactured.
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