sdguy55
Well-known member
Why is it that a carbide bit doesnt work as well in a angle grinder as it does in a straight? Everytime i use a carbide bit in my angle grinder it chatters and pops almost everytime. REALLY frustrating.
Air Angle Grinder question
- Thread starter sdguy55
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trboxman
Well-known member
I'd guess that the angled shaft has more play than the straight shaft...
radgto
Well-known member
+1
The area between the 2 gears at the 90 has a lot of slop in both of my die grinders. I get a much nicer finish with burrs in a straight grinder.
rlitman
Well-known member
It's the motion of the entire tool, not the play in the shaft. The way the tool kicks back at your hand with a carbide burr just isn't conducive to being used with an angle die grinder. A grinding disc however puts forces in a direction that makes a straight shaft grinder kick the wrong way.
jjjrmx5
Well-known member
I agree with rlitman.
If using a die grider with a carbide burr, I will almost always use a straight die grinder unless absolutely necessary. And then I still do not like it.
Flat head burrs are almost impossible to use with a 90 degree grinder and ball heads have their limit.
Burrs use the motor shaft as leverage and thus (mainly) perpendicular push against the line of shaft moment to help the burr cut as the tip or ball is often used for precision cuts or detail work.
The 90 degree angle grinder adds the extra linkage and leveraged moment on the pinion gears as well as flex and load but also makes the power stroke move 90 degrees in the wrong direction thus the tool jumping and overall uncontrollability.
I love the 90 degree grinders for sanding and polishing as in those cases you are compressing the 90 degree angle gear pin bearing against the housing and not leveraging it against the bevel gears itself (like a burr), but for cutoff wheels and burrs, only straight shaft grinders for me.
That's the way I was taught decades ago.
If using a die grider with a carbide burr, I will almost always use a straight die grinder unless absolutely necessary. And then I still do not like it.
Flat head burrs are almost impossible to use with a 90 degree grinder and ball heads have their limit.
Burrs use the motor shaft as leverage and thus (mainly) perpendicular push against the line of shaft moment to help the burr cut as the tip or ball is often used for precision cuts or detail work.
The 90 degree angle grinder adds the extra linkage and leveraged moment on the pinion gears as well as flex and load but also makes the power stroke move 90 degrees in the wrong direction thus the tool jumping and overall uncontrollability.
I love the 90 degree grinders for sanding and polishing as in those cases you are compressing the 90 degree angle gear pin bearing against the housing and not leveraging it against the bevel gears itself (like a burr), but for cutoff wheels and burrs, only straight shaft grinders for me.
That's the way I was taught decades ago.
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