Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Machining for a seal fit.

Machining for a seal fit.

Machining for a seal fit.

Does anyone one know of a machining process which can hold a tolerance of 0.0004 in. of a seal?

RE: Machining for a seal fit.

I know what "tolerance of 0.0004 in." means, but what does "tolerance of 0.0004 in. of a seal" mean?

RE: Machining for a seal fit.

Let me clarify, we have a spindle assembly with a slinger (collar) which is press fit onto the spindle shaft. The slinger is machined to fit an oil seal which has a tolerance of 4.875 +0 -0.0004 in. Do you know of a turning processes which can produce to +0/-0.0004 in?

RE: Machining for a seal fit.

Any machinist should be able to hit this tolerance.
Especially if it's a "one of" situation.
CNC equipment can repeatedly do this all day long.
If this is a regular lip seal,this tolerance req.is
probably a typo.Four tenthousandths is not necessary
for proper sealing action

RE: Machining for a seal fit.

Have you checked with the seal manufacturer whether that tolerance is a misprint?  I agree, that is almost impossibly tight for machining.  If it must be held, I think it must be ground, with temperature controlled environment.  If the shaft is steel, a change of 13F moves the dimension from low limit to high limit.  If it is aluminum, the change is only 6.5F.

RE: Machining for a seal fit.

Plus or Minus four tenths is doable on almost ANY lathe!!
I would also agree that for a seal this is most likely a typo

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - Strategies to Secure Connected Cars with Firewalls
White-hat hackers have demonstrated gaining remote access to dashboard functions and transmissions of connected vehicles. That makes a firewall a vital component of a multilayered approach to vehicle security as well as overall vehicle safety and reliability. Learn strategies to secure with firewalls. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - What is Generative Design and Why Do You Need It?
Engineers are being asked to produce more sophisticated designs under a perfect storm of complexity, cost, and change management pressures. Generative design empowers automotive design teams to navigate this storm by employing automation, data re-use and synchronization, and framing design in the context of a full vehicle platform. Download Now
eBook - Simulation-Driven Design with SOLIDWORKS
Simulation-driven design can reduce the time and cost of product development. In this engineering.com eBook, we’ll explore how SOLIDWORKS users can access simulation-driven design through the SOLIDWORKS Simulation suite of analysis tools. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close