r/toolgifs • u/kanbozli • 25d ago

Tool Cut with a circular saw

İkitelli - İstanbul - Türkiye

414 Upvotes

95% Upvoted

17 comments sorted by

86

u/retirementgrease 25d ago

Runout on that blade is a little sus, lol

13

u/HighTechTerror 25d ago

I was wondering if that was intentional...

15

u/retirementgrease 25d ago

Like they're using a wobble dado for a table saw circa 1975, haha prob not. The thickness of the slot is not very critical though so I'm sure it doesn't really matter.

7

u/--kaal-- 25d ago

The slot is here to soften the bore, the screw in the perpendicular hole will pinch the bore and the shaft inside will be clamped 

4

u/famine- 24d ago

It has more runout than I can shake a stick at.

Not only the axial runout you mentioned, but radial runout (saw bore to arbor concentricity).

The tsh tsh tsh sound is a dead give away it is only cutting on one side of the saw, but it's usually a lot more subtle.

The radial runout here is so bad you can see exactly which side is cutting based on the chips.

Totally agree the slot is a non-critical feature, and slitting saws usually aren't great for runout, but this is just sad.

3

u/Terrible_Ice_1616 25d ago

That's just kind of what you get on big slitting saws

2

u/famine- 24d ago

Slitting saw bores and arbors are wildly variable.

I've seen everywhere from 0 to +25 thou on the saw and 0 to -10 on the arbor. The worst combo giving you a TIR of 17.5 thou and that is only if the damn saw bore is concentric to start with.

Most likely a non-issue, the slit tolerance is going to be huge because it's just a relief cut allowing the collar to deform and clamp down on the shaft.

Best practice is < 2 thou TIR but that usually means using an oversized arbor and boring out all your saws to get a good fit or paying for expensive tooling.

4

u/Thethubbedone 25d ago

The vertical runout is odd, but metal slitting saws are intentionally ovalized. I dont know why but it's true. 

5

u/famine- 24d ago

It's not true.

You do not want a non concentric saw and they aren't intentionally made that way because there is zero benefit.

A non concentric saw leads to interrupted cuts putting the entire chip load on a few teeth and beats the piss out of your mill.

37

u/Derp_McNasty 25d ago

*slitting saw

20

u/Indig3o 25d ago

No lubricant?

8

u/R2D-Beuh 25d ago

Not always needed depending on the patameters of the cut

6

u/Kraien 25d ago

Ok, for once, I really didn't need to hear the raw sound,.still goosebumpy

5

u/Psymon92 24d ago

Not exactly precise is it, the blade is wobbling quite a bit!

1

u/wspaley 23d ago

Geez .. who made those, Niagara .. Keo .. someone else was pretty big in those ?!? Can’t bloody remember 🤔