It is NOT same profile as for gears. Gears have an involute profile and those "teeth" have a trapezoidal profile in tangential section. There such couplings available as standard elements you should not design them since there are several aspects which without own experience will go wrong. any way the manufacturing tolerances are very tight if you do not have the right machine tool it will not work properly. I do not know if there is a standard since it is a proprietary profile and was object of a patent.

I would try searching the Society of Automotive Engineers.

The only face driving 'splines' I have seen (in 12 years as a machinist) are square in profile. Relatively easy to manufacture and unlike tapered spline or gear tooth type elements, are less likely to force the two splined faces apart under load. I would check the machinery handbook under clutches - if there are any standards on this type of thing they might be found there.

Are not the face spline a standard type of coupling? r are they specifically developed for the first time by FAG/GKN

Not tapered splines cannot centre the 2 parts. The other advantage is the 2 parts have same profile, with rectangular the 2 parts have different profiles and thus require 2 different manufacturing procedures. The last advantage is the tangential gap free function which CANNOT be offered by rectangular connections.

Fortunately during all our live we cannot see everything and we can always learn a bit more from the others.

This makes live interesting, isn't it?

thanks for the info but is this a standard feature or something which GKN n FAG have developed recently..and can i use the basic shear area calculation to estimate the torque that can be transfered...

It is not a recent product it is standardized by a manufacturer (a German company) but I do not find the name any more I had a leaflet I cannot find.

Oldham Style (MOL Series)

Curved Jaw Style (GS Series)

I don't know how much power you need to transmit, put the above are some samples from just one manufacturer. You can see their products at http://www.lovejoy-inc.com/products/motion-control-couplings.aspx. If you search, there must be plenty of companies that make similar products. Good luck.

I am not sure about standards followed to design Serration, but it is a standard practice for high torque shafts. Joints with face key being used in many applications. Similar type of face teeth (serration) being used for rolling mill spindles when the flange diameter is a limitation. Very good for reversable drives.

thankyou all guys.for all your help....

I was able to remember the manufacturer and the name of this profile. Here are the informations you wanted to have.

Look under the names of the 1st picture and you get a full catalogue with all details. Be aware that the manufacturing requires a high technical plant with a very high precision. You could apply if you are familiar the reverse engineering approach for a full product definition. All data are available in the leaflet.

Good luck

Nice recovery. I would think that the drive and driven gears would be trying to wedge themselves apart as load in applied. What was the application it was used in?

I can't help but think that a simple manual automotive transmission would solve the connect- disconnect issues with readily available parts.

This can be used where you have a constraint on the spline OD. like the wheel end of an automobile. I guess this is used in the indexing mechanisms too extensively..good work..guru...have you used these??

Yes and results were very good. It has different properties making it interesting as backlash free, high moment low dimensions, self centring and several other. It is not necessary to use only steel other materials can be good for the application, I used for one an aluminium alloy.