×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Pinion Gear Contact Surface

Pinion Gear Contact Surface

Pinion Gear Contact Surface

(OP)
Hi All,

I have a pinion gear (drive gear) and a ring gear (driven gear). I have attached a photo and marked up the contact pattern on the tooth.

Does the contact pattern appear correct? Should the contact area extend up to the tip?

Thanks

RE: Pinion Gear Contact Surface

NJAus

what's the story , did it fail prematurely? that pitting doesn't look good.
pattern looks proper.

RE: Pinion Gear Contact Surface

I agree with mfgenggear's comment. Pitting at low point of contact on the pinion tooth flank is an obvious problem. Adding some tip relief to the ring gear teeth might help.

RE: Pinion Gear Contact Surface

The pattern can look like that if the pinion teeth are intentionally longer than the gear teeth.

The extents of the contact pattern will vary with the degree of loading. If you operate the drive with large service factor, the contact pattern will be smaller.

RE: Pinion Gear Contact Surface

Just to add,
Two possibilities
#1) end of life for the pinion.
Surface fatigue failed causing pitting.
#2) surface duribility miscalculated.
The hardness of the pinion tooth. Flanks not hard enough.

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


Resources

eBook - Manufacturing the Cars of Tomorrow
In this ebook, we'll explore how additive manufacturing is going to transform the way cars are made. This includes commentary from thought leaders such as Ford's CTO, Ken Washington, Customer case studies of ways 3D printing is being used today, and a variety of part examples where 3D printing is already impacting how automobiles are made. Download Now
White Paper - Smart Manufacturing for Semiconductor
New technologies and approaches present great opportunities for semiconductor manufacturers to achieve high levels of innovation, yield and improvement. This white paper explores some of these cutting-edge technologies and how they can be applied effectively in the semiconductor industry. Read about how Smart Manufacturing is transforming the semiconductor industry. Download Now
White Paper - Analysis and Simulation in Aircraft Structure Certification
Organizations using simulation and analysis tools effectively see the benefits in their ability to achieve certification faster and with drastically less total cost than those who do not maximize these tools. Read this White Paper to learn about how digital tools such as analysis and simulation help in aircraft structure certification. 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