joco-nz
Well-Known Member
- Joined
- Feb 21, 2016
- Messages
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Hello everyone. This request is for both myself and a mate. We both have BF20 or equivalent machine that has been converted to CNC for hobby use and in that setup are quite effective. We are now looking to push them forward again with a belt drive upgrade from the current geared system.
We believe Poly-v belts (other names being "micro V belts" and "ribbed belts") are the way to go and from what I have read the J profile seems to be right size as it will cover the rpm needs and horse power need (i.e. rpm on the small pulley up to around 5000 to 6000 rpm and a power rating of 750W on the spindle.
What I am hoping members can help with is as follows:
[1] Is the J belt profile appropriate? If not what would be a better choice and why.
[2] Help with the specs we will need for the belt pulleys. We understand that the Precision Mathews PM25 is a poly-v belt drive based machine of the same class as the BF20 or G0704. If anyone is able to supply specs (dimensions/drawings) on those pulleys it would really jump start things.
[3] with reference to #2 and the PM25 what belt spec/number is used.
I realise these questions might be a bit PM25 centric. That is because this seems to be one of the best examples of commercially available machine that comes stock with a poly-v belt drive.
If someone has an alternative BF20/G0704 type machine with stock poly-v d drive or have done it fully custom from their own design on that class of machine which has been successful and they are prepared to share, that too would be absolutely invaluable.
Hopefully the combined wisdom and experience of the group can boost us on our next stage in upgrading these wee machines.
Looking forward to the responses and shared experiences. Equally if anyone is interested in or wants to see what we have done and how we did it (plenty of other well documented examples out there) I'm more than happy to post info, plans, photos.
Cheers,
James.
We believe Poly-v belts (other names being "micro V belts" and "ribbed belts") are the way to go and from what I have read the J profile seems to be right size as it will cover the rpm needs and horse power need (i.e. rpm on the small pulley up to around 5000 to 6000 rpm and a power rating of 750W on the spindle.
What I am hoping members can help with is as follows:
[1] Is the J belt profile appropriate? If not what would be a better choice and why.
[2] Help with the specs we will need for the belt pulleys. We understand that the Precision Mathews PM25 is a poly-v belt drive based machine of the same class as the BF20 or G0704. If anyone is able to supply specs (dimensions/drawings) on those pulleys it would really jump start things.
[3] with reference to #2 and the PM25 what belt spec/number is used.
I realise these questions might be a bit PM25 centric. That is because this seems to be one of the best examples of commercially available machine that comes stock with a poly-v belt drive.
If someone has an alternative BF20/G0704 type machine with stock poly-v d drive or have done it fully custom from their own design on that class of machine which has been successful and they are prepared to share, that too would be absolutely invaluable.
Hopefully the combined wisdom and experience of the group can boost us on our next stage in upgrading these wee machines.
Looking forward to the responses and shared experiences. Equally if anyone is interested in or wants to see what we have done and how we did it (plenty of other well documented examples out there) I'm more than happy to post info, plans, photos.
Cheers,
James.