Gallery, Projects and General > How to's
Asian 4x6 Band Saw V belt sizing
superc:
I am also noting with great amusement a total lack of standardization from machine to machine on pulley belt size regarding the Chinese 4x6 saws.
DaveH has a 13mm 560 A22 whereas my own is a 10mm 559 A22. Both 559, 560 and even 562 (which another user has quoted to me as the markings on his own belt) are close enough as metric sizes, when speaking of spring loaded pulley arrangements, to 22" for 22" to be the operative belt length dimension.
Of greater significance here is that another user is reporting his original belt is an actual 1/2"x22" size.
Where this will kick in is if you ever decide to buy one of the spare pulley things for sale on Ebay. Clearly different sizes are out there and we should be sure which one we have before randomly putting them inside our machines.
superc:
Philf,
A full lap in about 0.3 seconds. Yeah I'd say that's just about right and what I see.
Actually that does add up very nicely and your calculation is completely explaining why I am getting at least 7+ rotations of the 300 inch mark in 6 seconds. In short both your rough calculation and the Jaquet indicator agree.. 300 in. / 64.5 = 4.65 blade lengths to one revolution of the 300 inch pointer. 7 revolutions in 6 seconds mean 2,100 inches. For linear foot per minute readings with the Jaquet, /2 = 1050, now add 1/2 of the big pointer's number. Voila 1,100 fpm.
lordedmond:
May I ask a stupid question but is this saw a wood saw because that's the belt speed I would expect to find ?
Stuart
superc:
They are supposed to be metal saws with a blade speed as shown in the photos provided by Manx Modder (i.e., 80, 120, 180 fpm), however wood blades of the proper size do exist and I (using those) have cut boards with it very nicely.
DaveH:
--- Quote from: superc on April 09, 2014, 02:26:40 PM ---They are supposed to be metal saws with a blade speed as shown in the photos provided by Manx Modder (i.e., 80, 120, 180 fpm),
--- End quote ---
The plate on my machine say's 80, 120, 200. :palm:
:beer:
DaveH
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