Tool Holder -- CAT 40 (ANSI)

[Chivo]

Does any one have the caterpilar 40 ( CAT 40 tool holder) "gage face or tape" dimensions. I want to make the spindle to hold those Tool Holders.

[dertsap]

tool manufacturers will provide the specs

[wms]

http://www.parlec.com/html/products/...peridspecs.php

Click on the RED (+) for the Cat tools..

[Chivo]

Yes, but they don't give you the tape face dimesions (cone)," I want to know the angle, and the 2 circles".

[wms]

Sure they do..

D1=1.750 (big end/ gage line)
L1= 2.687 (length of taper)
Taper angle is 3.5"/Ft.

[JPMach]

Check Machinery's handbook it should be in there next to other taper specs

JP

[Walt@SGS.Inc]

Chivo,
Look in the machinerys handbook. The book has no picture of a cat 40
V flange. However, if you look at the gage page, it will give you enough dimensions
for what you are after. The class X gage picture ties everything together.
I was glancing through a tooling catilog the other day and I didnot find many
helpful drawings with dimensions in the tool catilog. Maybe I had the wrong book
but I didnot find much.
Let us know if you need more information.
Regards Walt

[ajl6549]

also if u draw it in cad. u should be able to dim anything u want

[fpworks]

Look up ANSI B5.50. Parlec's drawing is for information...it is not suitable for manufacturing.

Be advised D2 (1.380 from the gage line) is usually not required for modern day machining centers. It is a carry over from the original standard. Some old machine's tool changers required clearance here. However, if you want to follow the spec...you have to follow the spec.

Note: If you see a machine that can accept CAT40 or BT40 tool holders, then it doesn't need this clearance. (this normally requires a reconfiguration of the tool changer mechanism because the v-flange is different between CAT and BT, although the taper is the same)

Depending on the intended use of your spindle, you may not need the drive keys nor the v-flange at all. I have designed many hydraulic tool holders for tool grinding machines that have neither the v-flange nor drive keys. (no tool changer and very little torque applied to the tool holder)

Good luck!
Justin

[Chivo]

I'm sorry, I'm a metric standard person.
what it means? Taper angle is 3.5"/Ft. (Degrees please)

[Walt@SGS.Inc]

Chivo,
3.500 inches per foot equals17.178253 degrees included or 16 degrees35 minutes and 39 seconds included. Angle with the center line is 8 degrees, 17 minutes 50 seconds.
Machinery Handbook, 27th edition page 714.
Quote from book, "Taper per foot represents inches of taper per foot of length.
For conversions into decimal degrees and radians see Conversion Tables of Angular
Measure on page 96."
The only place I have ever seen machine tool tapers measured in any thing
but 3.5 inches per foot unless on the tapers per foot and corresponding angles
in the Machinerys Handbook. Remember, you asked about American Standard.
Regards, Walt

[fpworks]

Angles are the same in metric and imperial It doesn't matter if you are referring to 3.5km/12km, the answer is still a dimensionless ratio.

FYI, the taper's included angle is usually referred to as 7/24, (not 3.5/12) so this might help you with your searches for additional information.

The included angle is calculated as follows:

2*atan(3.5/24) = 16.59429° or 16°35'40" (INCLUDED ANGLE)

If you are more interested in the taper angle to centerline, it is simply half the included angle:

atan(3.5/24) = 8.29714° or 8°17'50"

(I'm just pointing this out because I've screwed it up once before on a custom taper)