New to slab saw blade question (edited to add photos)
Jul 4, 2023 13:49:10 GMT -5
hummingbirdstones likes this
Post by tkvancil on Jul 4, 2023 13:49:10 GMT -5
Need a little help to confirm/deny what I think I already know...which is my new blade is bad.
Got a new HP14 and got set up leveled out etc. Before I ever put oil in I started it up to be sure every thing worked. All good except the vibration was more than expected. I have run many other saws and was pretty sure the blade was the source. Not wobble but hop, so I took the blade off checking/confirming bushing installed correctly, with proper fit to the arbor, nothing damaged or ill fitting there. Paint job on the green line blade pretty uneven so I thought perhaps it might be the source and maybe the hop goes away with the paint.
Put oil in and made about 12 cuts. Each start you can hear a tick tick tick, one part of the blade contacting first then when fully engaged some what of a hammer sound. Each cut hammering sound less and vibration less. Then it got louder again, stopped checked, all ok, restart the cut and sound mellowed back out before cut finished. In retrospect I believe a new sintered tooth (?) was exposed/engaged.
That's when I took a good look at the blade. Looking at the edge... one 7 inch area the "teeth" are worn and even with the body of the blade. run a finger along there and it is smooth. It transitions rather abruptly to where the rest of the blade still has "teeth" raised above the blade body. Some of these "teeth" still have square edges, some even have paint on the surface. In that long run there are two shorter 1.5 inch or so spots that resemble the smooth section.
That was Sunday. Call HP on Monday and try to describe the situation. They want to send me their "how to" videos and for me to send them videos of my blade. OK I tell her but I already know how to install a blade bushing and check blade run out. She mentions a break in period for the green line blade but cannot describe for me what that break in period typically involves.
Today I took the blade back off and verified installation and lack of damage to blade, bushing, arbor. No evidence of the blade slipping in the flanges. Put back together per their video. I checked blade run out and it was .003 which includes a tiny bit of movement in the vice. I even put a micrometer to the slabs I cut and they are even with no dishing or cupping.
What do we think? Bad blade? Break in? I will follow through with HP but would like input from here, always a trusted source.
the smooth area
20230704_152829 by Ken Vancil, on Flickr
some "teeth" with little wear
20230704_152735 by Ken Vancil, on Flickr
shorter low spot
20230704_152746 by Ken Vancil, on Flickr
after @ 1/4 turn
20230704_152800 by Ken Vancil, on Flickr
a few more in this album ... flic.kr/s/aHBqjALfuD
Got a new HP14 and got set up leveled out etc. Before I ever put oil in I started it up to be sure every thing worked. All good except the vibration was more than expected. I have run many other saws and was pretty sure the blade was the source. Not wobble but hop, so I took the blade off checking/confirming bushing installed correctly, with proper fit to the arbor, nothing damaged or ill fitting there. Paint job on the green line blade pretty uneven so I thought perhaps it might be the source and maybe the hop goes away with the paint.
Put oil in and made about 12 cuts. Each start you can hear a tick tick tick, one part of the blade contacting first then when fully engaged some what of a hammer sound. Each cut hammering sound less and vibration less. Then it got louder again, stopped checked, all ok, restart the cut and sound mellowed back out before cut finished. In retrospect I believe a new sintered tooth (?) was exposed/engaged.
That's when I took a good look at the blade. Looking at the edge... one 7 inch area the "teeth" are worn and even with the body of the blade. run a finger along there and it is smooth. It transitions rather abruptly to where the rest of the blade still has "teeth" raised above the blade body. Some of these "teeth" still have square edges, some even have paint on the surface. In that long run there are two shorter 1.5 inch or so spots that resemble the smooth section.
That was Sunday. Call HP on Monday and try to describe the situation. They want to send me their "how to" videos and for me to send them videos of my blade. OK I tell her but I already know how to install a blade bushing and check blade run out. She mentions a break in period for the green line blade but cannot describe for me what that break in period typically involves.
Today I took the blade back off and verified installation and lack of damage to blade, bushing, arbor. No evidence of the blade slipping in the flanges. Put back together per their video. I checked blade run out and it was .003 which includes a tiny bit of movement in the vice. I even put a micrometer to the slabs I cut and they are even with no dishing or cupping.
What do we think? Bad blade? Break in? I will follow through with HP but would like input from here, always a trusted source.
the smooth area
20230704_152829 by Ken Vancil, on Flickrsome "teeth" with little wear
20230704_152735 by Ken Vancil, on Flickrshorter low spot
20230704_152746 by Ken Vancil, on Flickrafter @ 1/4 turn
20230704_152800 by Ken Vancil, on Flickra few more in this album ... flic.kr/s/aHBqjALfuD
