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Spindle Tooling For Van Norman Milling Machines

Van Norman milling machines used a number of different spindle tapers. In addition to standard 30, 40, and 50 tapers, there are two proprietary Van Norman tapers. The #6 and #12 mills, as well as some #16 mills, used the Van Norman "C" taper. This taper is more commonly known as "5V", which is the Hardinge designation. The other Van Norman taper is "2", which Hardinge calls "50V". It was used in some 22L mills, and possibly others. Collets and tooling made by Van Norman will be marked "C" or "2", while items made by Hardinge or others will probably be marked "5V" or "50V".

5V Tooling
(Van Norman "C")
The drawing below shows the dimensions for 5V collets. The drawing is based on a copy of an old Van Norman drawing supplied to me by Orrin Iseminger. Clicking on the image will get larger version (2060x1600, 31Kbytes) that should print actual size at 300dpi. Below the drawing is a photo of a 5/8" collet. Click on the image for a larger version (640x217, 19Kbytes). As far as I know, 5/8" is the largest size available in a 5V collet.
5V Collet Drawing
5V Collet Photo
The next drawing shows a milling arbor for a 5C spindle. The main difference is the addition of key slots that engage the keys on the front of the spindle. This drawing is also based on a drawing I got from Orrin Iseminger, as well as measurements made on my own machine.

(UNDER CONSTRUCTION - Drawing not done yet)


50V Tooling
(Van Norman "2")
(UNDER CONSTRUCTION)
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Page design and contents copyright 2002 by John Kasunich. All rights reserved. These pages are presented as a free service for owners and prospective owners of Van Norman milling machines. The information on these pages is believed to be accurate but is not guaranteed. Please contact me if you find errors, have more information, or just have comments about this site or Van Norman machines.

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