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Blade dullness

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noiefish
off to a rocking start

Member since August 2020
Posts: 20

Blade dullness Sept 1, 2020 12:48:43 GMT -5 via mobile

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Post by noiefish on Sept 1, 2020 12:48:43 GMT -5

First, the disclaimer. This might be an odd or dumb question. 😁

How do you know when your blade is getting gunked up/dull on a slab saw? Since you can’t see it, do you listen for pitch change with the cut? Or for the motor to be working harder? I’m guessing there is something that triggers giving it some love before the blade seizes.

herb
spending too much on rocks

Member since November 2011
Posts: 476

Blade dullness Sept 1, 2020 13:12:25 GMT -5 via mobile

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Post by herb on Sept 1, 2020 13:12:25 GMT -5

I'm no expert, but for me it is hearing the motor working harder. But by the time I realize it is working harder, I usually get to the next level which is the blade binding in the cut and if I am lucky, the circuit breaker trips, or if I'm less lucky the drive belt starts burning because the blade is no longer turning, but the motor shaft is!

www.pandajewels.com/opencart

victor1941
driving up their electric bill

Member since November 2011
Posts: 2,180

Blade dullness Sept 1, 2020 13:40:33 GMT -5

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Post by victor1941 on Sept 1, 2020 13:40:33 GMT -5

Noiefish, there are three checks that are easy to make: 1. Rub a finger nail edge against the front edge-should feel gritty-if not cut old fire brick or 80 grit grinding wheel several times. 2. Make sure the cutting edge is not rounded but is flat to the side-swedge if necessary, 3. Make sure the blade is not dished and the blade is aligned to the cut.

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Welcome to the Rock Tumbling Hobby Forum where we share a love of rocks and a sense of community as enduring as the stones we polish. The RTH Forum of www.RockTumbling.com is an Amazon Associate site and we earn money from qualifying purchases you make after clicking on our links such as this Rock Tumbling Supplies on Amazon link for instance, or any of our various product ads and banners. By clicking our links every time you begin your Amazon shopping experience, you are generating a bit of revenue for the forum which helps us cover our expenses. Thank you for your support!