Hello
I need a new main drivebelt for a synchro 280 fitted with the electic speed chage system. Can anyone help with the details of a supplier or part number,
Drive belt for Synchro280
Moderators: Martin, Steve, Mr Magoo
Re: Drive belt for Synchro280
Hi Peter.
It all depends on what size pulleys you have.
I have a set of 6" pulleys here combined with a Simplex 4823 belt which measures 27mm wide, 850mm circumference. I think this came off an electric synchro lathe like yours. Eyeballing the angle with my angle gauge I estimate the included angle to be 24 or 25 degrees, I would say closer 25.
My own lathe however, a manual synchro, has 5" pulleys. I have fitted a 750mm belt to that, but it was tight. Seeing as how the difference between 5" and 6" pulleys is 77mm I would say that a 770 or 780 long belt would suit the 5" pulleys better.
EDIT: For 6" pulleys I would go here and look at page 2: 28 x 8x 850 ,assuming that my measurement of 27 means that the belt is worn 1mm narrower than stock:
https://www.transdev.co.uk/pages/belts/v ... 2_main.htm
It all depends on what size pulleys you have.
I have a set of 6" pulleys here combined with a Simplex 4823 belt which measures 27mm wide, 850mm circumference. I think this came off an electric synchro lathe like yours. Eyeballing the angle with my angle gauge I estimate the included angle to be 24 or 25 degrees, I would say closer 25.
My own lathe however, a manual synchro, has 5" pulleys. I have fitted a 750mm belt to that, but it was tight. Seeing as how the difference between 5" and 6" pulleys is 77mm I would say that a 770 or 780 long belt would suit the 5" pulleys better.
EDIT: For 6" pulleys I would go here and look at page 2: 28 x 8x 850 ,assuming that my measurement of 27 means that the belt is worn 1mm narrower than stock:
https://www.transdev.co.uk/pages/belts/v ... 2_main.htm
Re: Drive belt for Synchro280
Hello
Many thanks for your reply. Have used the info to order a replacement.
Peter
Many thanks for your reply. Have used the info to order a replacement.
Peter
Re: Drive belt for Synchro280
You are most welcome. Please report back when you have your belt that it is the correct size in case someone else needs the same info later.
Pete.
Pete.
Re: Drive belt for Synchro280
Hello again
The drive pullys were actually 6 1/2 inch diameter on my machine. I spoke with a couple of dealers and ended up with a Megadyne Varisect make belt 28mm wide 8mm deep by 800mm long.
It wasn't too bad to fit and works fine with a much smoother drive.
Many thanks again for the pointers
Peter
The drive pullys were actually 6 1/2 inch diameter on my machine. I spoke with a couple of dealers and ended up with a Megadyne Varisect make belt 28mm wide 8mm deep by 800mm long.
It wasn't too bad to fit and works fine with a much smoother drive.
Many thanks again for the pointers
Peter