Hardinge eccentric Bolt

jeffers

Cast Iron

Joined

Aug 24, 2007

Location

Rhode Island

• Jun 4, 2018

• #1

My eccentric bolt was badly pitted on my compound and I wanted to make a new bolt before it snapped and created a nightmare.
I used the dimentions and advice that jim Caudill posted and it worked out great.
Used my 4 jaw to do the offset diameter once the other diameters were turned, I used a dial indicator to set the offset.
I used a high strength 5" 7/16" cap head bolt from McMaster Carr for $8 instead of the $45 for the bolt from Hardinge.

 

Attachments

• 
  IMG_3383.jpg

  91.8 KB · Views: 251
• 
  IMG_3384.jpg

  92.4 KB · Views: 176
• 
  IMG_3385.jpg

  90.4 KB · Views: 195

L

L Vanice

Diamond

Joined

Feb 8, 2006

Location

Fort Wayne, IN

• Jun 4, 2018

• #2

While you are at it, think about drilling a 1/8" hole through the left side of the compound. If the eccentric ever breaks, it will take the pain out of replacing it. As you can see, the hole does not look bad. I think some people tap the hole and use a screw to plug it.

I wonder how that old eccentric got rusty, and what other issues it may suggest.

Larry

 

S

sam_stlouis

Cast Iron

Joined

Aug 1, 2010

Location

missouri, USA

• Jun 4, 2018

• #3

Nice job, if you don't mind what were the demensions and offsets. I wonder if there the same as the carriage lock bolt. Just with s different head, Allen head versus splines for a handle.

 

jeffers

Cast Iron

Joined

Aug 24, 2007

Location

Rhode Island

• Jun 5, 2018

• #4

Here is the thread I followed and a drawing for the dimentions can be found here:

http://www.practicalmachinist.com/v.../hlv-h-compound-broken-eccentric-bolt-196805/

I found that my bolt was a little different but I think it was probably shop made which might explain the corrosion if they used an inferior bolt as the rest of the lathe is in excellent condition.

Jon

 

jeffers

Cast Iron

Joined

Aug 24, 2007

Location

Rhode Island

• Jun 5, 2018

• #5

Good idea, I read about the problems, I hate altering from original and having gone through drilling a new hole for an eccentric bolt for a Trutrace attachment I would be happy to do this now if I had to. The thread is here:
http://www.practicalmachinist.com/v...e-trace-copy-attachment-hardinge-hlvh-349589/

 

JRIowa

Diamond

Joined

May 27, 2003

Location

Marshalltown, Iowa, USA

• Jun 5, 2018

• #6

This is a warning on your thread title. Adding "making" to the begining of it would have made a big difference. From the title, nobody knows that.
JR

 

jeffers

Cast Iron

Joined

Aug 24, 2007

Location

Rhode Island

• Jun 5, 2018

• #7

I did not post it as a "how to make it" I merely wanted to share my discovery of that it was not too difficult to replace it with the benefit of the excellent resources of this site.

 

jim rozen

Diamond

Joined

Feb 26, 2004

Location

peekskill, NY

• Jun 5, 2018

• #8

L Vanice said:

While you are at it, think about drilling a 1/8" hole through the left side of the compound. If the eccentric ever breaks, it will take the pain out of replacing it. As you can see, the hole does not look bad. I think some people tap the hole and use a screw to plug it.
Larry

View attachment 230008

Click to expand...

Usually after tapping and installing a setscrew, one stamps "OIL" alongside the screw hole.

=)

 

jeffers

Cast Iron

Joined

Aug 24, 2007

Location

Rhode Island

• Jun 5, 2018

• #9

jim rozen said:

Usually after tapping and installing a setscrew, one stamps "OIL" alongside the screw hole.

=)

Click to expand...

How about a couter bored Zerk fitting??!