Tool TTS tool tightening fixture

[slow-poke]

These look fairly new, I'm either going to make one, or wait until Ali/eBay start selling them.

Assume I'm going to make one, how much undersized should I bore the hole to make sure the bearing won't spin with say 75-100 ft-lbs of torque?

Aluminum or steel for the block, seems like getting a good tight fit with aluminum will be easier.

 

[gerritv]

BearingsCanada has them for less: https://bearingscanada.com/products/rc121610-one-way-needle-bearing-clutch-3-4x1x5-8-inch. I doubt you need the 3 row one, those are for load bearing, you only need the one-way locking feature. Plus the long needle lenght probably will lock better.

You could machine the hole for exact diameter, then split housing and add a screw to clamp? And retaining compound?

gerrit

 

[kstrauss]

I bought the Tormach one (https://tormach.com/compact-tts-tool-tightening-fixture-33034.html) a decade ago when it was somewhat cheaper. It still works great!

 

[slow-poke]

With the current status of the peso, that US $50 + shipping + broker fee + HST is going to be $Cdn 150 by the time it gets here. I'm going to make one. The river store has the bearing for $13 delivered, it's on order.

 

[kstrauss]

With the current status of the peso, that US $50 + shipping + broker fee + HST is going to be $Cdn 150 by the time it gets here. I'm going to make one. The river store has the bearing for $13 delivered, it's on order.

No suggestion here that you purchase from Tormach but merely a confirmation that the design works well.

 

[Dan Dubeau]

Somewhere here I have some one way needle bearings, and a CAD design for a flip top version that I never got around to making.......Maybe one day I'll tire enough of using the spindle for the holders I have without wrench flats......