Picked up a botttom-of-the-line unit, quite a lot of slop side to side, of the blade. Discovered that the arm is pivoted at the rear of the saw, with roughly 1/4 inch stub shafts in brass/bronze bushes. Turned the bushes 90 degrees which improved it greatly, but it strikes me that this is a pretty crappy arrangement and subject to early deterioration.
Suggestions for other materials or arrangements? What do the Hegners of this world use? / mark
Probably the best solution they had to keep costs down - make new bushings, and maybe new pins. If possible, you may be able to machine in room for small ball bearings to ride on the pins..... Ken.
Because the saw appears virtually unused, I'm assuming the bushes died an early death, didn't want to piss around every few running hours making new ones. Someone rejected the ball bearing idea as the travel is only a few degrees and they would wear a groove very quickly....
The pins are hardened and show no wear, and there seems to be room for small dia. ball bearings. Other suggestions? thanks / mark
Ken Sterl>>Picked up a botttom-of-the-line unit, quite a lot of slop side to side,
Hey Mark,
Under the "any other ideas" heading, if there is room for a "bearing", or even a proper bronze bushing, then there is usually a Torrington needle bearing that can be used. Very thin wall things. Even the
45 degrees that the saw pivots is enough for those to "work" a lot.Take care.
Brian Laws>Because the saw appears virtually unused, I'm assuming the bushes
Good idea, Brian - good example would be the needle bearings used in common driveshaft u-joints in rear drive vehicles - not much movement, but they last for a long time. Torrington's come in many sizes and he may even be able to simply knock out the bushing and press in the Torrington - unless your luck is like mine :-) Ken.
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