View Full Version : Best way to tighten a NMTB40 Toolholder

12-21-2010, 01:34 AM
Hi guys,

I have the NMTB40 toolholding system in the spindles of my mills. What is the best and safest way to securely tighten a tool into one of these holders? I've thought of this: http://www.edgetechnologyproducts.com/steel-pro-tooling-fixture.html

Do any of you have a home grown fixture or technique that works well?


12-21-2010, 02:50 AM
That or one of these:

http://www.travers.com/product.asp?RequestData=CA_Search&navPath=All+Products%2F%2F%2F%2FStorage+%26+Worksh op+Equipment%2F%2F%2F%2FRacks%2F%2F%2F%2FAttribSel ect%3DBrand%3D'TTC'%2F%2F%2F%2FAttribSelect%3DCata log+Description%3D'TTC+CNC+H%2FV+Toolholder+Fixtur e+-+TAPER%3A+CAT+40'&eaprodid=260634-69-101-007

Cant hardly build one for the price of one of those. Probably cheaper on ebay too.

12-21-2010, 07:57 AM
Macona's post flips out on an error, but what I always used was a vise that I made. Just a piece of DOM with two dog ears welded to it. You put the taper in it then made your adjustments.

12-21-2010, 11:22 AM
I've got a big chunk of aluminum that is cut to NT40 specs, I clamp it into a vise, drop the tool in and crank away. Much better than abusing the bearings in your machine.

12-21-2010, 01:04 PM
OK, lets try this:


12-21-2010, 01:24 PM
Cool, so there are some options out there. Thanks guys! Time to go shopping.

12-21-2010, 02:17 PM
I have a Bison 40-taper fixture that's nice and solid. It cost rather more than 800-watt's eBay special, however. $20? Sheesh that's cheap. Must be made by slaves or close relatives. How else could you do it?

12-21-2010, 02:36 PM
Never buy from 800watt, hes got the worst imports on ebay. Makes horror freight look good.

Though I will say his feedback has gone up some since I last seen it, He used to be at like 98%