Drill press pulley V Belts

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Originally Posted by Woodlee

Here is a link to a supplier in Australia for power twist belting .
http://www.motionind.com.au/Catalogu..._sub_grp_id=12
If you click on each belt size it opens another page with the Blackwoods' part number ,
if you have a Blackwoods' shop near you you should be able to get it easily .You can buy it by the foot and it is cheap enough to buy.
They even had it in stock in Darwin which surprised me
I use power twist on my lathe and had no issues with it .It works very well and runs quieter than a normal belt .

All belts stretch and will need adjustment ,even normal type vee belts
Vee belts are measured by section and length .
You need to measure the width of the belt at the top and the thickness to determine what section the belt is ,so it fits the pulleys profile correctly other wise it will not grip properly and will slip under load and wear the belt and pulley premeturely.
I don't have the sizes in my head ,but I do have a copy of the Engineers Black Book that has all this info in it .
I can scan the page and post if any one is interested.

Kev.

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Thanks Kev,

I will give the NSW distributors a call.

In the meantime I have noticed how bad the existing v belt to the motor pulley is, even though it's new.

When I turn one of the pulleys I note that the belt to the motor pulley displaces up to 4 mm vertically when measured half way between the pulleys, where as the other belt displaces less than a mm.

The idler pulley appears to run true, however the motor pulley is slightly out but not enough to displace the belt by 4 mm.

I have replaced the motor pulley belt with a cogged V belt and this has improved things.

As the link belt is more flexible than a V belt, it should make up for the motor pulley's imperfection, at least I hope it will.
Zelk

Quote:

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Originally Posted by zelk

Thanks Kev,

I will give the NSW distributors a call.

In the meantime I have noticed how bad the existing v belt to the motor pulley is, even though it's new.

When I turn one of the pulleys I note that the belt to the motor pulley displaces up to 4 mm vertically when measured half way between the pulleys, where as the other belt displaces less than a mm.

The idler pulley appears to run true, however the motor pulley is slightly out but not enough to displace the belt by 4 mm.

I have replaced the motor pulley belt with a cogged V belt and this has improved things.

As the link belt is more flexible than a V belt, it should make up for the motor pulley's imperfection, at least I hope it will.
Zelk

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I forgot to mention that some vee belts have numbers printed on them .
The numbers are the size or cross reference to a size .
Usually the number is prefixed by a letter eg: A -243 , B -750 or C-1111 which will give the section of the belt.
Both my drill and my lathe use A section belts ,which I think is pretty much the norm for this type of machinery.

Kev.

Quote:

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Originally Posted by Woodlee

I forgot to mention that some vee belts have numbers printed on them .
The numbers are the size or cross reference to a size .
Usually the number is prefixed by a letter eg: A -243 , B -750 or C-1111 which will give the section of the belt.
Both my drill and my lathe use A section belts ,which I think is pretty much the norm for this type of machinery.

Kev.

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k

Kev,

The belt dimensions are outer and inner widths are 10 and 6 mm respectively with 6 mm thickness. The only codes on them are M24 and M26.

I guess i will be using the A section belts.

Does the link belk simply collapse into the pulley groove when adjusted?

Zelk

Quote:

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Originally Posted by zelk

k

Kev,

The belt dimensions are outer and inner widths are 10 and 6 mm respectively with 6 mm thickness. The only codes on them are M24 and M26.

I guess i will be using the A section belts.

Does the link belk simply collapse into the pulley groove when adjusted?

Zelk

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Zelk ,
No ,It runs like a normal belt .Dosen't collapse at all.
Looking at the chart in the Engineers' Black Book ,by your measurement looks like you will need a "Z "section belt .
Not sure if power twist is made in this section I think it comes in A,Band C only.
Maybe a better option is a good quality vee belt .
I would take both belts as a sample when purcashing your new ones.
Never checked my drill ,but it probably has the same" Z "section belt .

Kev.

Quote:

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Originally Posted by Woodlee

Zelk ,
No ,It runs like a normal belt .Dosen't collapse at all.
Looking at the chart in the Engineers' Black Book ,by your measurement looks like you will need a "Z "section belt .
Not sure if power twist is made in this section I think it comes in A,Band C only.
Maybe a better option is a good quality vee belt .
I would take both belts as a sample when purcashing your new ones.
Never checked my drill ,but it probably has the same" Z "section belt .

Kev.

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Kev,

Thanks for your help.

Zelk

Quote:

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Originally Posted by zelk

Kev,

Thanks for your help.

Zelk

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Glad I could help some one out.

Kev.