I am ready to make a mechanical drawing but have issues

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Discussion Overview

The discussion revolves around the challenges of creating a mechanical drawing, specifically focusing on the requirements for a rod that accommodates both a grooved bearing and a linear bearing without slop. Participants explore concepts related to press fit tolerances and the sizing of rods and holes.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions the feasibility of having a rod that fits both a grooved bearing and a linear bearing tightly without slop.
  • The same participant seeks clarification on what constitutes a "press fit" tolerance and requests specific dimensions for a 0.5 hole regarding the appropriate rod size for press fitting and locating without pressing.
  • Another participant provides links to resources that define various types of fits, such as sliding and interference fits, and mentions calculators for determining tolerances.
  • A later reply references a well-known engineering resource, suggesting it as a valuable tool for mechanical engineering information.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specific dimensions or feasibility of the rod design, and multiple viewpoints regarding the definitions and applications of fit tolerances are presented.

Contextual Notes

The discussion lacks specific numerical values for press fit tolerances and does not clarify the assumptions behind the definitions of fits. There is also no resolution on the exact requirements for the rod and bearing configuration.

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One question is, I need a rod that both has grooved bearing tightly fit and a linear bearing on the same rod with no slop. Is this possible? What is a "press fit" tolerance? If I have a 0.5 hole, what size rod will be press fit? What size will locate without pressing? Boy I wish I had an engineering friend that I trusted. Thank-you.
 
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Thank-you.
 

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