kb0thn
Stainless
- Joined
- May 15, 2008
- Location
- Winona, MN, USA
Hi group,
We are installing 3/32" 420 SS roll pins through some various 17-4PH stainless parts. Quantity is low thousands per month. Press is a small 1 ton hand arbor press. There is custom tooling to hold the pins to be installed inline with the hole.
About 9% of the initial test run has pins that jammed part way through. Maxing out the small press did not provide enough force to get them through.
I am thinking that the pins are galling. Perhaps they are slightly off alignment and start to dig in. Does this seem like a reasonable possibility? The roll pins are passivated and the various 17-4PH pieces are off the machine and maybe washed in soap and water ... if it matters.
I am considering dipping the random 17-4PH pieces or possibly the roll pin in some form of lubricant to prevent galling. The pressed together assemblies gets installed in anodized and powder coated aluminum parts. So I need something is relatively benign and/or easy to clean off under running water. I have seen WD40 stain and discolor anodize before, so I think it is out.
Any recommendations?
Thanks,
-Jim
We are installing 3/32" 420 SS roll pins through some various 17-4PH stainless parts. Quantity is low thousands per month. Press is a small 1 ton hand arbor press. There is custom tooling to hold the pins to be installed inline with the hole.
About 9% of the initial test run has pins that jammed part way through. Maxing out the small press did not provide enough force to get them through.
I am thinking that the pins are galling. Perhaps they are slightly off alignment and start to dig in. Does this seem like a reasonable possibility? The roll pins are passivated and the various 17-4PH pieces are off the machine and maybe washed in soap and water ... if it matters.
I am considering dipping the random 17-4PH pieces or possibly the roll pin in some form of lubricant to prevent galling. The pressed together assemblies gets installed in anodized and powder coated aluminum parts. So I need something is relatively benign and/or easy to clean off under running water. I have seen WD40 stain and discolor anodize before, so I think it is out.
Any recommendations?
Thanks,
-Jim