Gifted a Bandsaw

[woody1Participant @woody1]

Evening all, hope well and safe.

I was gifted a bandsaw by a relative after mentioning I was saving for a horizontal saw. It's brand new and still in the box! Could anyone point me in the direction of reduction pulley math. I have no problem fabricating the counter shaft I have just forgotten/lost my information. The machine is shocking quality wise (apart from the motor). Two days, I wreckon I can get it all least serviceable.

Thanks,

Woody.

[woody1Participant @woody1]

Counter Pulley Math

[not done it yetParticipant @notdoneityet]

I think we might need a little more information re any problem with a brand new saw is needing modifying straight from the box. Or am I right in guessing this is a vertical bandsaw for timber?

[woody1Participant @woody1]

Sorry, I didn't want to write paragraphs.

Yes! Wood bandsaw "workzone" so Aldi or Lidl special. I'm guessing the motor will be around 1450rpm I'll have a look. I gave it a whirl (no cutting), I'm not impressed even for wood. It's not so much the motor, frame or pulleys, it's more the running gear and especially the quality of the castings!

Would I be correct in saying the castings are heavily toward the zinc side?

It was free, couple of pennies and some time (which i have by the bucket) I wreckon it will be an extra string for my bow.

Woody.

[Jeff DaymanParticipant @jeffdayman43397]

I find on my bandsaw 150 feet per minute blade speed is good for general cutting of steel, aluminum and copper alloys with a HSS blade. You can work backwards from that knowing your wheel diameter, calculate the circumference of your drive wheel by multiplying pi x diameter, and calculate what rpm will cause the wheel (circumference ) to move the blade 150 feet in 1 minute.

Example:10" dia wheel – has 31.41" circumference. 31.41" / 12 inches to get feet is 2.62 feet.

150 feet/min / 2.62 feet per revolution= 57.25 rpm for 10" dia wheel to give 150 feet/min

[Jeff DaymanParticipant @jeffdayman43397]

If motor is 1450 rpm the reduction required total is 1450/57.25=25.32:1. You could do very close to this with two 5:1 pulley sets. Drive pulley on motor 1450 rpm 2" dia to 10" pulley (maybe ex old washing machine) has output speed of 290 rpm, a 5:1 reduction. Fixed to the same shaft the 10" dia pulley is on, there is a second 2" pulley, with speed 290 rpm. It could drive a second 10" dia pulley on the saw shaft, a second 5:1 reduction, outputting 58 rpm. Close to the optimal 57.25 rpm in the original calc for a 10" dia saw wheel at 150 fpm. Hope all this helps.

Edited By Jeff Dayman on 17/05/2020 00:52:00

[not done it yetParticipant @notdoneityet]

Sorry, I didn't want to write paragraphs.

I didn’t. But you do need to give the pertinent details. The bandsaw spec will likely provide the cutting speed. It likely needs a speed reduction of greater than ten. Start by finding the specification for your example.

[JourneymanParticipant @journeyman]

This one perchance?

Link *** HERE *** no longer available it says.

John

[woody1Participant @woody1]

Cheers guys, just the information I needed, yes that exact one! I'll start on it this week firstly I'm going to sort the guides and add some bearings, its quite loud.

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