Ariel Owners Motorcycle Club

IF you really get stuck with any of these types of bearings you can machine a suitable size sleeve, in mild steel. Put a Cut through both sides acccurately at the 1/2 way mark. Check the crush in the rod and get it exactly what you want or a bit More. Tin and Whitemetal it. check crush again and bore the Babbit metal to size on a conrod borer, Mill or Lathe. For best bearing life limit the thickness of the Babbit to about 10 thou. thick That means a very accurate setting up. Scribe lines at the metal join line Punch in the bits that stop it turning at some stage before metalling and boring. Very fine feed and light cut on the last pass Fine point on a HSS bit is fine. A well deserved pat on the back for you when you finish. Nev

During the 70s and 80s square 4 bigend shells were not available in Australia, however Burling and Simmons (Parramatta Rd, Auburn) BSA dealers, (otherwise known as Burglars and Stealers) kept a large range of BSA spares including spares for BSA stationary motors. Those in the know here went to Burling and Simmons and asked for bigend slippers for a ? BSA stationary engine (I cannot remember exactly which one) to fit their square 4. It may well be the tac grip engine.
David

Thankyou all for the information l think I will get them measured accurately then go from there to see if anything is similar and possibly machinable to fit