hi folks i need a new pulley for my compressor i know machine mart sell them
but there listed as pcd measurements
mine measures 225mm diameter
what pcd do i need
thanks

PCD relates to the distance between the mounting bolts for the pully wheel.

Click the link below and you should be able to work it out.

http://www.needforspeed.co.uk/htmlpages/TechWheels.htm

[Edited on 28/12/07 by Mark G]

yea i understand pcd in that respect but for the pulley it fits onto a shaft
so i cant see how pcd is relevent
and theres no way to work a diameter out

http://www.machinemart.co.uk/shop/range/guid/38ED3488-DAAD-4081-A62A-16554351AF21
if this helps show what i mean

You need to check the shaft diameter and match the bore size to it. As for the P.C.D. suspect that may be the diameter possibly measured from the bottom of the vee?

quote:

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Originally posted by 24vseven
yea i understand pcd in that respect but for the pulley it fits onto a shaft
so i cant see how pcd is relevent
and theres no way to work a diameter out

http://www.machinemart.co.uk/shop/range/guid/38ED3488-DAAD-4081-A62A-16554351AF21
if this helps show what i mean

---

does this help at all?

notes on pulleys and belts

tom

PCD when referring to a belt drive is the mean grip diameter.

There are a million ways to describe it but it is basically the bit of the pulley that has the same SURFACE SPEED as the belt thats touching it. its usually something like 2/3 of the groove depth in the pulley.

For your compressor, just choose the pcd that is a bit less than your outer diameter. (prob about 10mm less at a guess)

Is this any good to you, 225mm outside dia, 19mm shaft, A section belt.

better attach the file....
Rescued attachment DSCN0826.JPG

quote:

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Originally posted by r1_pete
Is this any good to you, 225mm outside dia, 19mm shaft, A section belt.

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No NTDWM, this is one I aquired for a lathe, now surplus....
As long as you're sorted...
Rgds.
Pete.