How long do knurlers last?

[goose]

Either I've forgotten how to use a knurler tonight, or something else is going on.

Straight knurl, used for about 60 small pieces, instead of nice crisp knurls forming in a few seconds, all I'm getting is a mushy knurl pattern and slurry after (what I feel) is in an overly long time and with undo pressure. I've been cleaning it constantly, and it doesn't help. Time to order a new one? Or am I doing something wrong?


Thanks

Gary

[Ryobiguy]

Is this after 60 of the same parts? Just wondering if you're doing a different part with a diameter that doesn't mesh as nicely.

Does it track evenly on the first revolution?

-Matt

[PaulF]

I find if the diameter of the part is not an exact multiple of the knurl spacing they double track.
Also I leave my knurling tool float loose so it can move into the groves if there is a slight missalignment.
But as a cutting tool/press tool they do wear out.
PaulF

[Your Old Dog]

Size has nothing to do with this, you aren't cutting and removing metal as in gear making but rather "displacing" it. At somepoint when you tighten up the knurler you will reach a point at which time you will have perfect knurls. "If you could" displace a 1" thick piece of steel down to 1/4" thick you would find that at several different diameters along the way you would have perfect knurls. Call it a harmonic relationship if you want, it amounts to the same thing in my mind.

If you refute this, explain to me how it is that I can get perfect points on any random diameter of stock I choose to knurl?

If your knurler looks muddy that's what you will end up with. When the knurler is new and crisp looking you get crisp knurls. I find the process generates a lot of heat so it is possible your knurlers are shot.

[DR]

What type of knurl holder are you using? What's the material?

The easiest way to get good knurls is with an opposed wheel type knurler, the scissor type is popular and inexpensive. One pass and the knurl is completley done.

[PaulF]

Size has nothing to do with this, you aren't cutting and removing metal as in gear making but rather "displacing" it. At somepoint when you tighten up the knurler you will reach a point at which time you will have perfect knurls. "If you could" displace a 1" thick piece of steel down to 1/4" thick you would find that at several different diameters along the way you would have perfect knurls. Call it a harmonic relationship if you want, it amounts to the same thing in my mind.

If you refute this, explain to me how it is that I can get perfect points on any random diameter of stock I choose to knurl?

If your knurler looks muddy that's what you will end up with. When the knurler is new and crisp looking you get crisp knurls. I find the process generates a lot of heat so it is possible your knurlers are shot.

"Harmonic relationship" I don't think so, What is hapening is you pass through diameters that are even divisions of the ridge spacing.

See Machine Shop Trade Secrets by James Harvy pg. 189/190.

PaulF

[Peter Neill]

Here we go again...

[Liger Zero]

Here we go again...

Grab a handful, Peter.

Liquid refreshment is in the cooler next to the mill.

[camdigger]

Grab a handful, Peter.

Liquid refreshment is in the cooler next to the mill.

Mind if I have some popcorn too?

[camdigger]

"Harmonic relationship" I don't think so, What is hapening is you pass through diameters that are even divisions of the ridge spacing.

See Machine Shop Trade Secrets by James Harvy pg. 189/190.

PaulF

??!? Hmmm you must have a different definition of harmonics than they taught me... Harmonics are basically multiples.. usually applied to acoustics/vibrations, but still mathematical multiples... You're arguing the same side of the discussion... White is black, black is white, you are wrong and I am right...

Hey Liger, Pass the popcorn...