What type of belt?

[Chris DentonParticipant @chrisdenton53037]

Morning, I have a belt on my Harrison 155 that has 12mm width and 9mm height but can't find a standard type for it?

Any ideas?

[Chris DentonParticipant @chrisdenton53037]

[KWILParticipant @kwil]

What are the actual dimensions of the matching pulleys?

You could also contact Tony      Lathes.co.uk  who can supply  belting for all machines.

Edited By KWIL on 16/03/2016 10:06:22

[Clive FosterParticipant @clivefoster55965]

Probably cheap import A series. 12.5 by 9 mm is actually listed as A series size by some makers. True A is 1/2" x 5/16".

Given the age of the lathe A series is probably factory. SPA will work too but the size isn't exactly the same, the belt is deeper, so you can have issues when running round small pulleys. Don't forget that the minimum pulley size for full power transmission from a plain A series belt is around 4" pcd. Exact size depends on pulley profile. There are modified profiles which let you use pulleys a bit smaller. Anything smaller needs a notched belt. Doesn't matter a great deal with ordinary die cast alloy pulleys as the profiles are pretty poor at best of times.

Clive.

Edited By Clive Foster on 16/03/2016 10:37:18

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