Undercut for bearing housing
Undercut for bearing housing
(OP)
I am designing a bearing housing. The housing will hold the bearing plus a spacer ring on either side to prevent movement. The spacers apear to have square edges, so I need to design in clearence in the corners of the housing. Is there a standard design or tool for an undercut? I believe the same standard should apply to shaft design when there is a ground finish in both the diameter and a shoulder. There needs to be clearence for a grinding operation.
Thanks
Thanks
Ward Holloway, Jr, PE





RE: Undercut for bearing housing
Mike Halloran
Pembroke Pines, FL, USA
RE: Undercut for bearing housing
If the face of the housing or shaft shoulder is to be finish ground then the grinding wheel's radius will create a new corner radius, unless the undercut is into the bore AND face. That almost requires a parting tool fed in at an angle, or worse. I'd chamfer the spacer rings heavily on both sides for universal installation.
RE: Undercut for bearing housing
Show the guys the housing and they will proboably tell you that they will be using a certain size boaring bar that takes a specific insert and then your done. Use the insert to form the cut, based on the machinist input, and your all set.
Standards are great for engineers but they often just cost more money they doing what the machinist would like.
As an aside I agree %100 with Mike's suggestion to chamfer the spacer. Your could spend 100's or 1,000's of dollars to do something that could be done in 30 seconds on a belt sander. If I understand your question, though, you have to grind the housing which would require an undercut anyway so chamfering the spacer dosn't save you anything.
RE: Undercut for bearing housing
Ward Holloway, Jr, PE
RE: Undercut for bearing housing
I agree that your first stop should be the oldest, crankiest machinist in your shop.
Mike Halloran
Pembroke Pines, FL, USA
RE: Undercut for bearing housing
RE: Undercut for bearing housing