How to draw an involute internal spline

[connormac]

I need to draw a involute spline, 30 degree pressure angle, internal.

 

The print seems to give me all the numbers I need according to the Machinist Handbook. I just don't know how to go about drawing it. I have to create a DXF for the wire edm shop. Where do you start?

[mayday]

use the gear chook, If I remember there is an option for internal or external

[Guest]

there is a gear chook you can use and just plug in the info. gear.dll

[kccadcam]

Alt-C - Gear C-Hook

fill in the blanks....

[Hardmill]

quote:

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use the gear chook, If I remember there is an option for internal or external

---

quote:

---

there is a gear chook you can use and just plug in the info. gear.dll

---

quote:

---

Alt-C - Gear C-Hook

fill in the blanks....

---

I dont know what these characters are

talking about but Id try the Gear c-hook.

 

 

PEACE

[mayday]

I thought you called in gay today Hardmill

[Hardmill]

No I called to say you were still gay Wes

 

How the hell are you bud ??

 

 

PEACE

[connormac]

I think I will try the gear chook.

Thanks all for the quick response.

[John Summers]

If you know the circular space width, you can find the circular tooth width.

tooth = pitch - space. The point here is that the space must be greater or equal to half the pitch. If you don't enter the tooth width, it will be. Anything less for the tooth width will be clearance (bigger space). Let GEAR.DLL figure out the dimension between pins. You have to enter YOUR pin diameter, which might be slightly different from 'the book'.