Chainsaw Repair

Here are a series of Silvey Prosharp Square Chain Grinder Details. This is more or less considered a Cadillac of The Silvey Product Line. It is not currently produced and carries a possible $2,000 price tag. This grinder is not set up on a stand or mounted against the wall for use but is laying on its side on a table.

To pull up on the lever places the chain cutter tooth into position at the grinding wheel. There is a cable arrangement actuated by the slide that pulls on a lever of the chain vice to hold the chain steady. Then you turn the crank to feed the chain cutter into grind wheel. This action presents the whole dressed surface of the grinding wheel to the chain tooth at once. This lets the all important dressed corner last much longer than on the swing arm grinder whose feed action makes the top of the dressed corner do all the work in grinding the inner face of the top plate as it wipes across the under surface. This is a feature of the Pro Sharp and SDM4 that makes them shine over the Razur Sharp II and Swing Arm versions.

There are pre-set marks for the dressers and all the other angles to make work chains or race chains. But you still have to make sure that the dressed working corner of the grinding wheel meets exactly the outer corner of the cutter on the chain.

I would like to mention here that there is a fourth Silvey grinder design (SDM-4) that has chain rail holders like the Pro sharp. But there are two of them and it is more or less a cross between the Pro Sharp and the Razur Sharp II. The chain rails are fastened on slide mechanisms and are fed into the grinding wheel a little like on the Razur Sharp II but the grinding wheel is mounted up at an angle.

The Pro Sharp chain rail assembly will pivot left and right for the opposing cutters. The motor is reversible.


Silvey Prosharp Grinder Chain Holder Detail Showing Over All Chain Holder Mechanism Detail




Silvey Prosharp Grinding Wheel Mounting - salmon, 8" X 3/16" X 1" hole



Silvey Prosharp Grinder Showing Preset Marks For Adjustment



Silvey Prosharp Grinder Slide Detail showing where vice cable attaches under slide mechanism


Silvey Prosharp Motor And Dresser Detail. The big black knob is to swing the top plate dresser across the grinding wheel.


Silvey Prosharp Chain Grinder Detail showing a glimpse of the cable from the slide mechanism to the chain vice.



Silvey Prosharp Showing Typical Marks For Preset chain Grinding Angles Specific to the Prosharp Line  Of Grinders



Silvey Prosharp Showing Angle Of Grinding Wheel To Chain Cutter Tooth and where vice cable enters vice area from the slide area.



Silvey Prosharp Gib Adjustments, return spring and orther details of the slide mechanism



Silvey Prosharp Grinder Over All Detail Under Chain Holder



Silvey Prosharp close up Grinder Motor which is used on all the current Silvey square grinders.



Here are a couple short videos showing the Pro Sharp and SDM-4 in action to give you an idea how they work.
http://www.madsens1.com/GRAPHICS/Silvey/Prosharp.wmv

http://www.madsens1.com/GRAPHICS/Silvey/sdm4.wmv