RE: Re: [4x6bandsaw] HF 4x6 arm tension?
The 6x4 doesn’t have a measurement, but the handbook for a 7x12 horizontal/vertical I read, said the “Bow weight” (presume they mean the weight of the head casting) should be set to 5-6kg (11-13 lb) when measured with a spring balance(fish scale) hooked to the blade tensioning knob.
7x12’s are massive by comparison with a 6x4 with much coarser teeth blades, meant to make much wider cuts and all have hydraulics, so I’d expect the 6x4 to be way less than that, maybe 3-4 kg (7-9 lb).
I run mine at 9 lb which I get when the handle is screwed all the way in – maximum tension on the spring and I’m looking at flipping the angle bracket (that the spring pulls against) over, so I can reduce it even more.
I believe the counterbalance spring is not meant to be adjusted even though you can.
If you need to slow the rate of cut, you should use hydraulics, which is definitely the way to go for cutting thinner sections (pipe, tube, angle etc).
If you think you need to hang extra weight off the head, you probably have too fine a tooth blade on (too many tpi) - jv
Thanx for the replies. I will look into the hydr in the future. I have set it to about 15 lbs right now...used a old fish scale to measure.
--- In email@example.com, <firstname.lastname@example.org> wrote:
Hi Dave, the spring doesn't pull the blade down, it does the opposite.
If you use a spring balance at the adjusting knob, and the spring tension turned OFF
the blade and arm will weigh about 30lbs more than enough,
I have never found any need to hang weights on the blade arm
I tension mine to between 10 - 15lbs YMMV