Spur gear selection for parallel shafts

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Discussion Overview

The discussion revolves around the attachment of a 12 teeth pinion to a DC motor with a 4mm diameter flat tip shaft. Participants explore various methods for securing gears to shafts, particularly focusing on the compatibility of gears with flat tip shafts and the materials available.

Discussion Character

  • Technical explanation, Debate/contested, Conceptual clarification

Main Points Raised

  • One participant suggests using a set screw in the gear's hub as a simple method for attachment.
  • Another participant inquires about the availability of stainless steel gears that can accommodate a flat tip shaft.
  • Some participants express confusion regarding the terminology and compatibility of gears with flat tip shafts, questioning the mention of "stanley steel gears."
  • A later reply notes the existence of gears designed with an opposite shape for flat tip shafts.

Areas of Agreement / Disagreement

Participants express differing levels of understanding regarding the attachment methods and the terminology used, indicating a lack of consensus on the best approach for securing the pinion to the shaft.

Contextual Notes

There is ambiguity regarding the specific types of gears available for flat tip shafts and the terminology used by participants, which may lead to misunderstandings.

novato
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Hi,

I have a DC motor with 4mm diameter shaft, flat tip.

How can I attach a 12 teeth pinion to this drive shaft?. I have been loking for pinions and gears on the web but they don't specify how are they attached to a shaft, as there are round shafts and flat tip shafts. Do I have to ask for gears with hub and set screw?

Any help would be very appreciated.

Novato
 
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There are many ways to do it, one of the simplest would be a set screw in the gear's hub, like on this W.M.Berg gear:

http://www.wmberg.com/catalog/photos/B05B065.jpg
http://www.wmberg.com/catalog/productsearch.aspx?url=http://wmberg.smartcats.com/sc_app/default.asp
 
Last edited by a moderator:
The set screw is a good option but, is there any stainless steel gear that matches a flat tip shaft like this?
 

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Your question doesn't make a whole lot of sense. The flat is made for the set screw. Who/what are stanley steel gears?
 
FredGarvin said:
Your question doesn't make a whole lot of sense. The flat is made for the set screw. Who/what are stanley steel gears?
Thank you. I have seen some gears that have an opposite shape for flat tip shafts.
PD: I'm sorry about the bad spelling.
 

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