Hand Tools Archive

Subject:
Re: Fear of heat- not an issue *LINK*

Derek Cohen (in Perth, Australia)
The problem I used to have and I think many others have is the plane or chisel is thrust straight into a flat wheel, thereby heating the 3/4" of bevel all at once. The proper technique is to use sweeping passes on a crowed wheel. 1/2" wheel is wide enough.

Joel wrote a wonderful article for FWW magazine in 2008 on the use of a crowned wheel (which he learned from Barry Iles of Ashley Iles Edge Tools). As you note Bill, the advantage of a crowned wheel is that it restricts a blade heating up excessively. Indeed, Joel cautioned against a high speed 8" bench grinder, preferring the lower surface speed of a 6" to further lower heat.

But that was 10 years ago, and technology has changed. The alloy CBN wheels offer a cool grind. In fact, a camber is not needed on these wheels, as it was on the vitreous types.

My thought about the old wheels is that they wore unevenly, and running a blade across a supposedly "flat" face would cause a part of the blade to dig in/catch. This is what caused burning. The CBN wheel, on the other hand, does not go out of flat, and it is quite difficult to have the blade catch in this manner (I'm sure that one could if you try hard enough !).

Regards from Perth

Derek

Messages In This Thread

Tormek: getting old wheel off?
Re: Tormek: getting old wheel off?
Re: Tormek: getting old wheel off
Re: Tormek: getting old wheel off
Re: Tormek: getting old wheel off
Fear of heat- not an issue
Re: Fear of heat
Re: Fear of heat
Fear of heat- any evidence?
Re: Fear of heat- any evidence?
My set up is like yours...
some heat calculations
More exercises with no exact answers
Re: More exercises with no exact answers
Re: some heat calculations
It sure as hell ain't from heat
Re: Fear of heat- not an issue
Re: Fear of heat- not an issue
Re: Fear of heat- not an issue
Re: Fear of heat- not an issue
same, but details different, and a question
Re: same, but details different, and a question
Re: same, but details different, and a question
Re: same, but details different, and a question
Question
Search surface grinder wheels, Type 1 *NM*
Wheel recommendation
Re: Wheel recommendation
Did it. Here are 2 extensive sources:
Re: Did it. Here are 2 extensive sources:
You have identified the problem
Problem 2
David, please link us to
Re: David, please link us to
I did find this I wheel
What this wheel is, technical data, flawed
Re: Fear of heat- not an issue *LINK*
All these problems aren't
already equipped vs. not
Please listen, more issues that aren't......
Re: Please listen, more issues that aren't......
Re: Tormek: getting old wheel off
Re: Tormek: getting old wheel off
Re: Tormek: getting old wheel off
Re: Tormek: getting old wheel off
Re: Tormek: getting old wheel off?
Re: Tormek: getting old wheel off?
Re: Tormek: getting old wheel of littl
Re: Tormek: getting old wheel of littl
Re: Tormek: getting old wheel off?
Similar to pulling rusted car wheels
Re: Similar to pulling rusted car wheels
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