[Japazo]

Hello everyone,

I am working on a shaft that has an internal spline cut into one side of it. We are requesting more information from the customer because I'm not sure if I even have enough information to make it. They supplied the following,

25 Tooth Side Fit Straight
Cylindrical Internal Involute Spline per JIS-B1603
0.531 Major Diameter
0.492 Minor Diameter
0.500 Spline Length

The spline has a relief to allow it to be broached appropriately. I need a way to generate the profile of the spline so I can model the part properly and get a single point broaching tool made. Is there enough information here, and can anyone help in generating a DXF or otherwise CAD-usable file of the profile? I looked around at a few different gear profile generators but they all seem to require a subscription or license, which does not make sense for one use.

Let me know if anyone can help, thanks!

[bostosh]

Easy cad stuff .. need 24 decimal accuracy?
no problem for a broach maker..........
Show us the job, we are visual types.

All this is inside the Machinery's Handbook. .
They taught us gears from this in the 60's

How many parts, what finished accuracy, material, hardness, ?
This may get expensive for a correct, hardened cutter and precision indexing table
Especially for a non-production one off.
I don't have that broach laying around and have made them

Involute curves are nautilus shell curves split open

https://www.geartechnology.com/subje...c%20couplings/

[Japazo]

Easy for someone who deals with gears all day, I'm sure. That, I am not.
We don't need any special accuracy.
There is nothing to show, it is a hole in the end of a shaft with a spline callout, exactly as I have typed above.

I've read through the machinery handbook but I'm not seeing where they define how to actually create a profile for a given spline. I'm also not clear on how to use the information I have been given to calculate the specifications needed to draw it accurately.
The material will be 416 Stainless Steel in condition T (26 - 32 HRC). There will be 130 parts. We will be single-point broaching these on a CNC lathe, so no special equipment will be necessary other than the broach itself. We have done plenty of single point broaching, so that is not the issue.

I don't need help with the application, I need help with the theory. I need a profile in order to make a broach, and a drawing for our internal inspection process. Is anyone able to shed some light on how to do this?

[Tom-AMS]

Gear Pair and Spline Pair design