NMTB (National Machine Tool Builders Association) tool holders, also known as Quick-Change comes in different sizes and they’re mainly single flanged tool holders. The taper size is shown by the number: NMTB 25, NMTB 30, NMTB 35, NMTB 40, NMTB 45, NMTB 50, NMTB 55, and NMTB 60.
The smallest tool holder (NMTB 25) is normally used on small machines. While the largest (NMTB 60) is used on larger machines.
NMTB tool holders is a national association focused on building machine tooling systems such as NMTB shank, NMTB spindle, and other tooling systems.

Unlike other tooling systems, the NMTB tool holders are designed with a drawer. And as single flanged tool holders, there are 2 keyways attached to a simple flange.
Although NMTB tool holders are relatively old, they still fit into modern machining systems. These tool holders are manufactured by numerous manufacturers, making it difficult to have uniform dimensions for all NMTB tools.

In most cases, the flange thickness, flange diameter, and flange length from the taper’s gage line are not used to determine the dimensions of the NMTB tools.
NMTB tool holders are manufactured in such a way that most of its tooling system is compatible with other tooling systems like Erickson Quick Change Spindle. Aside from the Erickson Quick Change, other brands are also compatible with NMTB tooling system.
In most cases, users are advised to find out more info about the tool before making a decision.
NMTB tool holders can fit into other tooling systems of the same dimension by simply changing out the lug bars. For instance, users can do tool changing operations by fitting NMBT 30 into Cat 30 or BT 30.
                                       NMBT Face Tool Holders

These holders are designed with an Arbor Screw Key. And four mounting holes are also included in the design.

Some of its specifications are                                 NMTB TOOLING image
Gage length of 2.25 inches.
Flange diameter of 4 7/8 inches.
 • Four mounting holes.
  • A bolt size of four inches.

Although more NMBT face tool holders are available and the specifications are dependent on the user’s choice.

NMBT Shank

These tooling systems are designed with drive keys and arbor screw. They can fit into Erickson Quick-Change holders and they’re mainly used as adaptors.

The sizes and dimension of these shanks vary, making them suitable for various machining operations.
NMTB tooling is mainly designed for high-speed machining operations and high precision tolerance. End users will find them useful as they’ll be able to complete their projects with high accuracy.
One fascinating feature of NMTB tooling technology is in its compatibility with other Quick Change Spindles.

NMTB Compatibility with other Quick Change Spindles.
NMTB tooling system is highly compatible with other tooling machines. But the thing is… Each tool holder has to be appropriately fitted with a corresponding Quick Change spindle of the same dimension.
That is, NMTB 30 can fit into Cat 30 and BT 30 tool holders. NMTB 40 and NMTB 50 will fit into Cat 40 and Cat 50 respectively.

In the original NMTB shank design, the shank is pulled up into the spindle through the use of a drawbar. As stated earlier, there are different manufacturers of the tooling system and its dimensions are NOT determined by flange diameter, flange thickness, and the distance of its taper’s gage line to the flange’s outward face.
The Erickson Quick-Change spindle manufactured by Erickson Tool company was designed to be compatible with NMTB tool holders. Erickson Quick Change is designed in such a way that the drawbacks are NOT used. Instead, quarter turn lockouts are used to fit the tool taper into the spindle.

For this tooling setup to work, the tool flange’s outer face is being pushed by the projection or “lips” found at the nut. In some cases, the NMTB tool holders do NOT work with Erickson Quick-Change spindle due to the distance between the Flange’s outer face and the taper gage line. This gage distance is large, making it difficult for the projection or “lips” of the Quick Change to fit into the Flange’s face.
Other issues are observed when the Flange diameter on some NMTB holders are too small and unable to fit into the mouth of the spindle.

Overcoming these issues involves a thorough examination of the NMTB tool holders and spindles. This is to ensure that the specifications by the manufacturers match.
Generally, the Erickson Spindles works well with NMTB tool holders. Other brands that work well include Collis, valenite, and Kennametal holders.

What Next?
Performing high-speed machining operations requires great precision and accuracy. Ultimately, you’ll need a tool holder that’s designed for the modern day world and which is also compatible with other Quick Change Spindles.
NMTB holders offer great value for users aiming to complete their projects with near-PERFECT precision and accuracy.
These amazing tool holders are manufactured with top notch designs and come in diverse sizes.
Are you searching for tool holders for your professional or DIY projects? NMBT tool holders are uniquely designed to serve your needs.

2017-12-07T17:21:39+00:00 December 13th, 2017|Uncategorized|