Spur Gears for Bosch and FP

Posted by Matt Reiland at 04/09/2001 9:05 AM EST

Engineer on team #226 from Troy, Troy Athens and General Motors CRW.

Can anyone give me some info on the mating spur gears to the FP and Bosch motors for building your own transmission. I saw so many great looking compact designs, I want to do some experimenting this summer

Any help is greatly appreciated

Matt

Posted by Joe Johnson at 04/09/2001 1:14 PM EST

Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.

In Reply to: Spur Gears for Bosch and FP
Posted by Matt Reiland on 04/09/2001 9:05 AM EST:

Fisher Price
Full Depth
Pressure Angle: 20 degree
Diametral Pitch: 32 (teeth per inch of diameter)
Number of Teeth: 16 (on most – some strays exist)

Drill Motor
Full Depth
Pressure Angle: 20 degree
Module: .7 (mm of diameter per tooth)
Number of Teeth: 12

By the way: Module*Diametral Pitch = 25.4

Good Luck.

Joe J.

Posted by Matt Reiland at 04/09/2001 2:28 PM EST

Engineer on team #226 from Troy, Troy Athens and General Motors CRW.

In Reply to: Gear Data… One more time…
Posted by Joe Johnson on 04/09/2001 1:14 PM EST:

Thanks for your help, your team was also a great help at nationals to us.

Posted by bill whitley at 04/09/2001 2:57 PM EST

Student on team #70, Auto City Bandits, from Powers Catholic High School and Kettering University.

In Reply to: Thanks Dr. J
Posted by Matt Reiland on 04/09/2001 2:28 PM EST:

You’ve been a great resource to us, both as a team and as a community. I thank you for your insight and understanding, and especially for your willingness to share it, both on the forums and at competitions.

Bill
Former Team #70 :wink:

Posted by Brent L. Marriott at 04/10/2001 12:19 PM EST

Engineer on team #279, Tech Fusion, from Toledo Technical Academy and Rogers High School and Dana Corperation.

In Reply to: Gear Data… One more time…
Posted by Joe Johnson on 04/09/2001 1:14 PM EST:

I have to agree with you about the Fisher Price motor, but I found that the Bosch motor had a 36 diametral pitch or a .70556 Module.

Brent
Tech Fusion- Team 279

Posted by Joe Johnson at 04/10/2001 12:42 PM EST

Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.

In Reply to: Re: Gear Data… One more time…
Posted by Brent L. Marriott on 04/10/2001 12:19 PM EST:

I have seen the blueprint (don’t ask me how I came to see it).

The gear is not an English 36 DP gear but a metric 0.7 module.

I have it on good authority though that after much noisy grinding with very aggressive lapping compound, it will eventually mate with a 36 DP gear.

I don’t recommend this practice, but I have been told that it can be made to work, so who am I?

Bank on it though, 0.7 Module.

Joe J.

Posted by Brent L. Marriott at 04/11/2001 7:43 AM EST

Engineer on team #279, Tech Fusion, from Toledo Technical Academy and Rogers High School and Dana Corperation.

In Reply to: Trust me on this one…
Posted by Joe Johnson on 04/10/2001 12:42 PM EST:

: I have seen the blueprint (don’t ask me how I came to see it).

: The gear is not an English 36 DP gear but a metric 0.7 module.

: Bank on it though, 0.7 Module.

: Joe J.

Thanks Joe, I just wanted to double check with you. I know some of the teams had problems with the Bosch motor gear pitch. This should clear up any questions.

Thanks again,
Brent- team 279

Posted by Jason Iannuzzi at 04/12/2001 9:48 AM EST

Engineer on team #11, Marauders, from Mt. Olive HS. and BASF, Rame Hart, CCM.

In Reply to: Trust me on this one…
Posted by Joe Johnson on 04/10/2001 12:42 PM EST:

After Dr. Joe posted the info last year, we decided to make our own this year. .7 Module worked like a champ. Our machine was rather noisy, but we didn’t have to deal with those nasty gear boxes.

Posted by Matt Reiland at 04/11/2001 11:12 AM EST

Engineer on team #226 from Troy, Troy Athens and General Motors CRW.

In Reply to: Gear Data… One more time…
Posted by Joe Johnson on 04/09/2001 1:14 PM EST:

I hope this isn’t way out there but this year were you allowed to use some of the gears (6)towards the ‘timing pully’s’ allowed in additional hardware or did you have to make a gear that mated to the BOSCH? I am not sure about what small parts sells to mate to the pinions, I guess I have to look into it a little more.

My electrical backround is failing me right now

Thanks anyone who can help

Posted by P.J. Baker at 04/11/2001 11:20 AM EST

Engineer on team #177, Bobcat Robotics, from South Windsor High School and International Fuel Cells.

In Reply to: Mating gears
Posted by Matt Reiland on 04/11/2001 11:12 AM EST:

EOM means end of message

Posted by Joe Johnson at 04/11/2001 11:28 AM EST

Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.

In Reply to: Mating gears
Posted by Matt Reiland on 04/11/2001 11:12 AM EST:

There is only one source I am aware of that sells metal 0.7 Module gears off the shelf (PIC-Design.com).

Sadly, they are not on the “approved” source list for FIRST stuff.

So… the only way I know of to get a mate for the pinion on the Drill Motor is to have one made from raw material that IS legal FIRST stuff (e.g. 1/4 steel plate – unlimited and no grade of steel specified, hurray!)

If you contact wire EDM sources, you may be able to find a local source that will burn you a gear for not much more than what Small Parts Inc. sells their gears for.

Believe it or not, all but the largest of our gears were burned for less than $50 each, very competitive with what Small Parts Inc. charges.

Joe J.

Posted by Matt Reiland at 04/11/2001 11:36 AM EST

Engineer on team #226 from Troy, Troy Athens and General Motors CRW.

In Reply to: Custom Gears Only: 0.7 Module
Posted by Joe Johnson on 04/11/2001 11:28 AM EST:

I can’t thank the people supporting this site enough for all of your advice and information

Thanks Again