Greetings all,
New member and a bit of a novice. I'm trying to understand TIR (total indicated runout) and whether or not my new drill chuck is within the manufactures specs. I purchased a Llambrich JK-160 MT2 drill chuck that gives a "certified" max TIR of 0.0016". I've read a number of online posts talking about runout and a few talked about TIR as being either the stated value or +/- (double) the stated value. This is where I'm a bit confused.
Is the TIR, in this case 0.0016" or double 0.0032"?
After installing the new chuck, I measured 0.0005" at the quill and on the arbor itself. On the drill body I measured 0.001". When measuring at the chuck, I am getting 0.0065" consistently. I chucked several different items including a Starrett edge finder and several 1/2" router bits having long smooth shanks. All gave the same results when measured at the chuck. I also rotated the chuck 180 degrees (it's tabbed) and repeated the measurements with similar results. Rotating my have corrected ~0.00025" or so. Hard to measure that.
I wasn't expecting this much runout given the very low runout at the quill/arbor and the spec's of the drill chuck. My novice expatiation is that my quill is introducing 0.0005" and the chuck is certified to have 0.0016" thus the total runout I should measure at the chuck would be around ~0.0021" - 0.0026". However I'm getting much more at 0.0065".
Am I misunderstanding how to measure for TIR or is this chuck just out of spec?
New member and a bit of a novice. I'm trying to understand TIR (total indicated runout) and whether or not my new drill chuck is within the manufactures specs. I purchased a Llambrich JK-160 MT2 drill chuck that gives a "certified" max TIR of 0.0016". I've read a number of online posts talking about runout and a few talked about TIR as being either the stated value or +/- (double) the stated value. This is where I'm a bit confused.
Is the TIR, in this case 0.0016" or double 0.0032"?
After installing the new chuck, I measured 0.0005" at the quill and on the arbor itself. On the drill body I measured 0.001". When measuring at the chuck, I am getting 0.0065" consistently. I chucked several different items including a Starrett edge finder and several 1/2" router bits having long smooth shanks. All gave the same results when measured at the chuck. I also rotated the chuck 180 degrees (it's tabbed) and repeated the measurements with similar results. Rotating my have corrected ~0.00025" or so. Hard to measure that.
I wasn't expecting this much runout given the very low runout at the quill/arbor and the spec's of the drill chuck. My novice expatiation is that my quill is introducing 0.0005" and the chuck is certified to have 0.0016" thus the total runout I should measure at the chuck would be around ~0.0021" - 0.0026". However I'm getting much more at 0.0065".
Am I misunderstanding how to measure for TIR or is this chuck just out of spec?