Small wheel for fuller

T

Tin.Man

Joined
Sep 5, 2010
Messages
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I'm looking to add about a 3/4" wide fuller on a 1" wide blade, stock thickness will be .125 or .156. Think a 2" wheel would work? I'm grinder less for the next week or I would try just curious if someone knew of the top of their head. Not very deep just something to reduce surface area a bit.

Thank you in advance
 
A 2" wheel plunged .025" deep will create a fuller .444" wide, .050" deep will create a fuller .624" wide. Plunged .100" deep and the width becomes .874".

Width will actually be a bit wider depending on your belt thickness.
 
🙌🏻 thank you math god!! Really appreciate that. Trig? Or do you have a wonderful calculator?
 
http://www.1728.org/circsect.htm

If you look at the numbers given by kuraki, you will see that it is impossible to grind a .75" wide fuller on both sides of the blade with a 2" wheel on .156" stock. The stock would have to be nearly 1/4" thick for the fuller not to grind through.

Use the calculator above and select the chord and segment input option. Make the E-D segment about 30% of the stock thickness and the chord A-B .75". That will tell you the radius of the wheel needed. It shows that a .75" wide fuller in .156" thick stock would require a 3" wheel. For .125" stock, it would need a 4" wheel. In .156" thick stock, a 2.5" wheel would just barely grind the fullers, but the web would be very thin ... about .030" thick ( 1/32").
On .125" stock, the smallest wheel allowable would be a 3" diameter (40% deep fullers). The web would be only .025" thick ... that is 24 gauge, which is very thin.
 
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