Gilmer belt sizing info wanted

[pete376403]

Anyone know if there is a formula or charts or ?? to work out tooth belt (Gilmer belt) sizing? I'm looking at converting a Trojan (oldie but fairly goodie)radial arm saw that originally uses triple A series vee belts to a tooth belt drive. The shafts are 100mm apart and the pulley cant be any larger than 55mm diameter and up to 50mm wide.
Its probably a lot of work for not much gain but the existing belts require constant attention and are a real shit to replace.

Thanks.

[Grumph]

Go and see a belt supply specialist. In ChCh there are two I could use for that sort of job and i'm sure there are similar in Wellington.
Mr Ocean may be able to point you at a suitable specialist.
I wouldn't have thought a conversion to toothed belt would solve your problems as the shafts are still too close together....

[buggerit]

Gates belts, found calculator on their website I seem to recall

[pete376403]

Thanks. I searched some more and found this http://www.bbman.com/belt-length-calculator/ which I think will answer the questions.

[husaberg]

Anyone know if there is a formula or charts or ?? to work out tooth belt (Gilmer belt) sizing? I'm looking at converting a Trojan (oldie but fairly goodie)radial arm saw that originally uses triple A series vee belts to a tooth belt drive. The shafts are 100mm apart and the pulley cant be any larger than 55mm diameter and up to 50mm wide.
Its probably a lot of work for not much gain but the existing belts require constant attention and are a real shit to replace.

Thanks.

Yes there is many calculators but use the word timing belt.
http://www.pfeiferindustries.com/timing-belt-length-center-center-distance-calculator-i-66-l-en.html
http://www.bearingboys.co.uk/Timing-Belt-Finder--Calculator-24-a
http://www.gates.com/catalogs-and-resources/resources/repository/calculator/powergrip-tension-calculator
http://www.bbman.com/belt-length-calculator/
A few will even tell you if your pulleys are to small ie less than 1/2 in tooth contact etc

[pete376403]

Thanks. I tried the bbman.com one and it looks like its do-able, they can supply the two pulleys and belt for less than $US100. I'm guessing a 2" wide belt should be adequate for a 1hp motor driving a 12" blade.

[husaberg]

Thanks. I tried the bbman.com one and it looks like its do-able, they can supply the two pulleys and belt for less than $US100. I'm guessing a 2" wide belt should be adequate for a 1hp motor driving a 12" blade.

A 32mm wide AT10 willl handle 100HP. On a motorbike primary drive. so yes it should be OK.:laugh:

[Grumph]

In my view, the small size of the drive wheels will limit the number of teeth engaging. The short distance center to center means a short belt and rapid wear.
Don't throw the vee belt pulleys away...

[Drew]

In my view, the small size of the drive wheels will limit the number of teeth engaging. The short distance center to center means a short belt and rapid wear.
Don't throw the vee belt pulleys away...
Depending of course on belt speed. But at least with a toothed belt he can silicon the living shit out of the belt, to promote longer life.

[pete376403]

The bbman.com calculator gives me two 36 tooth 57.3mm diameter pulleys 102.5mm apart with 18 teeth in mesh using a HDT5 belt. For $US100 its probably worth a punt. Motor speed is 2850 rpm. I couldn't find anything to say if that was allowable or not.

Pretty neat calculator though.