HAt the risk of stirring up a marmite topic, those of us who have tried 10 ba crankpins probably wouldn’t go back to using the standard Slaters 12ba .
This requires an investment in a set of 10 ba taps and a pinvice capable of holding the Slaters crankpins bush. The taps do not need to be the best quality, mine were around £10 from the bay of E. Of course quality will always pay for itself in the long term. In short, the wheels are re tapped for the larger size and the bush is threaded to become the “nut”. A slim 10 ba washer may be required between the wheel and coupling rod and the bush will be filed to the correct length. The overall final appearance is much improved and valuable clearance gained on locomotives with outside cylinders.