Rack and Pinion

[ozturbo]

I have a question about getting the proper spur gear to run on the rack

I want to use the Gear rack shown here:
http://stdsteel.com/gr_stock.htm
Item 200011

and this gear:
part # S1166Z-024A012
from
https://sdp-si.com/eStore/

What i don't know and can't find is if the rack and the gear having a different diametral pitch will work.

[yukonho]

Pitch is the one thing that MUST match for rack and pinion to work. Using different pitches is the same as using the wrong nut on a leadscrew.
Colin

[harryn]

Hi Ozturbo

I looked at the options from sdp and std steel - there is remarkably no obvious compatible gear for the racks listed (at least in the general range typically discussed here). I might be searching wrong, but I did not find a match.

In addition to D pitch, you also need to match pressure angle.

I have seen more options from boston gear's catalog that will cover you. Their list of stocked spur gears is amazingly complete. They also sell rack.

I found it quite valuable to read Boston Gear's literature on the 14.5 degree vs 20 degree pressure angle. www.bostongear.com

[liquibyte]

Well, that was informative. See this pdf for some nice in depth gear theory.