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Off Center Products, OnCenter Marker


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#1 Blacksmith Jim

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Posted 07 June 2010 - 02:11 PM

I've spent a lot of time thinking about building a similar tool as this one I just found for sale online:

Marker

I noticed that the description says not to use cold rolled stock with this tool. Why not? I like working with cold rolled, and I know a lot of talented smiths that do as well. Why wouldn't it work with cold rolled?

Thanks,

Jim
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#2 ThomasPowers

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Posted 07 June 2010 - 02:37 PM

Cold rolled is "harder" and so will wear the marker faster.
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#3 MattBower

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Posted 07 June 2010 - 03:09 PM

That was my first thought, too, but the chisel is made of S1. I would think it could be made hard enough for use on CR mild steel without sacrificing too much toughness. Maybe Grant will swing by and clarify this.

#4 Blacksmith Jim

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Posted 07 June 2010 - 04:19 PM

Yeah, I was hoping that Grant would pop in :) Isn't a lot of cold rolled 1018? I thought that mild hot rolled tended to run with a little more carbon in it...
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#5 Nakedanvil - Grant Sarver

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Posted 07 June 2010 - 07:06 PM

I have no idea why it says that. No reason not to use it on CR. OBTW that's official!
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but then there are others who, with the help of their art and their intelligence,
transform a yellow spot into the sun.” ~ Pablo Picasso ~

#6 thisblackduck

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Posted 08 June 2010 - 12:43 AM

I've spent a lot of time thinking about building a similar tool as this one I just found for sale online:
Marker

G'Day OOps!
Might be a dumb question but how does it work?

#7 ThomasPowers

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Posted 08 June 2010 - 09:20 AM

Very nicely thank you! (cue rimshot)

As I understand it---as you change thickness of stock, the angle of the marker changes keeping it aligned with the center----Very neat trick indeed!
Thomas Psychotic Psychobabblonian Powers

#8 Blacksmith Jim

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Posted 08 June 2010 - 10:35 AM

Ah, thanks for the info Grant!
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#9 thisblackduck

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Posted 08 June 2010 - 04:48 PM

Very nicely thank you! (cue rimshot)

As I understand it---as you change thickness of stock, the angle of the marker changes keeping it aligned with the center----Very neat trick indeed!

Thanks for that

#10 thingmaker3

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Posted 12 June 2010 - 01:47 PM

As I understand it---as you change thickness of stock, the angle of the marker changes keeping it aligned with the center----Very neat trick indeed!

Looks like our clever Mr. Sarver has once again been dabbling in the dark arts of Trigonometry and/or the Pythagorean Theorem.
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