Gd485
New Member
- Messages
- 20
- Location
- Bedford, UK
Hi,
There seems to be a few posts regarding buying a Bandsaw of overseas origin. I bought the Warco CY90 bandsaw.
Like most of these cheaper imported machine tools the quality is very variable.
They often require a good bit of fettling to get them to perform well so I was prepared for a bit of work to get the saw to work well.
After putting the stand together and bolting the saw to it was time to give the machine a test run. There seems to be a common factor with these machine tools the covers rattle wildly. A bit of neoprene self adhesive strip soon sorted the unwanted noise.
The first test cut was mild steel rod 25mm diameter wasn't too successful. The blade kept stopping but the motor and v belt were running. I thought this maybe due to insufficient blade tension.
This solved the problem but the whole arm/body casting was flexing. On investigation the drive and idler wheels were not concentric this caused the tension of the blade to very. Also within the time it took to cut through the bar the motor became very hot. Also the blade didn't like the tension variation and damaged the teeth.
N.B. The drive pulley has a void in the casting.
I discovered the idler was some 0.040" non-concentric and the drive wheel was 0.120" non-concentric!
After a bit of lathe time I got both wheel to run within 0.002". Reducing the diameter of the wheels to obtain the concentricity did not affect the blade path and there was sufficient adjust to the blade guides to accommodate this small change.
Testing the re-vamped saw the flexing of the casting stopped, the machine was a lot quieter and the motor temperature reduced considerably.
I could have sent this saw back to Warco but the replacement could have problems as well. On arrival the saw worked and could have done it job but having purchased power tools from similar source previously I was prepared to do a bit of work to make an adequate machine into something that would last and reach its full potential.
N.B. the paint missing from the rim shows the extent of the axial run out and the rim thickness shows the radial run-out.
There seems to be a few posts regarding buying a Bandsaw of overseas origin. I bought the Warco CY90 bandsaw.
Like most of these cheaper imported machine tools the quality is very variable.
They often require a good bit of fettling to get them to perform well so I was prepared for a bit of work to get the saw to work well.
After putting the stand together and bolting the saw to it was time to give the machine a test run. There seems to be a common factor with these machine tools the covers rattle wildly. A bit of neoprene self adhesive strip soon sorted the unwanted noise.
The first test cut was mild steel rod 25mm diameter wasn't too successful. The blade kept stopping but the motor and v belt were running. I thought this maybe due to insufficient blade tension.
This solved the problem but the whole arm/body casting was flexing. On investigation the drive and idler wheels were not concentric this caused the tension of the blade to very. Also within the time it took to cut through the bar the motor became very hot. Also the blade didn't like the tension variation and damaged the teeth.
N.B. The drive pulley has a void in the casting.
I discovered the idler was some 0.040" non-concentric and the drive wheel was 0.120" non-concentric!
After a bit of lathe time I got both wheel to run within 0.002". Reducing the diameter of the wheels to obtain the concentricity did not affect the blade path and there was sufficient adjust to the blade guides to accommodate this small change.
Testing the re-vamped saw the flexing of the casting stopped, the machine was a lot quieter and the motor temperature reduced considerably.
I could have sent this saw back to Warco but the replacement could have problems as well. On arrival the saw worked and could have done it job but having purchased power tools from similar source previously I was prepared to do a bit of work to make an adequate machine into something that would last and reach its full potential.
N.B. the paint missing from the rim shows the extent of the axial run out and the rim thickness shows the radial run-out.