Thread: 1400rpm v 2800rpm

You need the speed for the blade to cut effiecintly

Damn, I was hoping albeit with not much faith, that it was not really that important.
Looks like my motor will be closer to $350 than $200.

Thanks Jim

(Re-reading my reply it may be taken as terse, apologies Jim, my thanks were genuine)

Whilst I am at it I am looking to replace my table saw on / off switch with something with a large safety paddle type stop switch. Anyone have a suggestion where I can buy one?

Originally Posted by haggismuncher

(Re-reading my reply it may be taken as terse, apologies Jim, my thanks were genuine)

Whilst I am at it I am looking to replace my table saw on / off switch with something with a large safety paddle type stop switch. Anyone have a suggestion where I can buy one?

No problems

Have seen the switch somewhere but does not come to mind at the moment.

G'day Haggismuncher,

As Jim said cutting efficiency is determined amongst other things by the speed of the tips of the blade. Fitting a single phase motor at 1400 rpm could be compensated by changing the size of the pulleys on the drive belt/s. Having said that one would need to understand the drive system - is it direct or through a gearbox? Also the single phase motor would need enough horsepower to be able to handle the load.

Difficult to advise without seeing the unit so maybe you should seek out someone experienced in the process.

For the switch you will find that most electrical wholesalers have single phase motor starters. A green go button and the big mushroom head red stop button. On my saw I mounted it at knee height at the in-feed position where I can hit it with hand or knee in emergency to shut down. These devices are also fitted with thermal overloads so you will need to check the current rating on the motor to ensure you protect it should it be overloaded. Fancier starters have an overload reset button as well - mine doesn't and I have to take the cover off to reset it.

Hope that helps.

Jamie

Hi Muncher,

I remember seeing a modification on the woodwhisperer website where he hinged a small plank of wood over the start/stop switch. He cut a hole in it to access the start switch and to stop it he now had a huge target to hit with a knee, foot or hand when he needed. I keep meaning to make one up for my saw but it hasn't risen near the top of the priority list. (It's only a safety thing )

Doing that may go some way to saving the extra cash for the new motor? About that - I'm surprised a 4 pole motor is cheaper than a 2 pole, I'd have expected it to be the other way around.

Happy new year to all