Author Topic: Square Grinders  (Read 5885 times)

0 Members and 0 Guests are viewing this topic.

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6369
  • Karma: 228
  • For The Love Of Chainsaws
  • Location: NCO
Re: Square Grinders
« Reply #10 on: December 01, 2012, 11:28:14 pm »
You can get grinding wheels for these from Silvey, Bailey's, or Madsens. Bailey's is a little more expensive than the others on grind wheels.

There are several 8" wheels available. The standard wheel is the Salmon wheel but you can get gray and white ones too. There is a blue wheel that costs twice as much but it lasts longer that Bailey's sells.

http://silveychaingrinder.com/

http://www.madsens1.com/mnu_grindjack.htm

http://www.baileysonline.com/search.asp?catid=9760&skw=silvey%20grinder 

I have pictures of the Simington 450 and 451B grinder instructions if anyone is interested but I will have to Email them to you.   
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6369
  • Karma: 228
  • For The Love Of Chainsaws
  • Location: NCO
Re: Square Grinders
« Reply #11 on: December 19, 2012, 09:37:05 pm »
My early model 1979 Silvey Swing Arm Grinder that at one time had a red body, (Now mostly natural - as cast - aluminum.) and what was originally a gold anodized arm. It has a new salmon grinding wheel from Silvey. Most of the fasteners and all the springs are new from the local hardware down the street but the diamond dressers are the original as well as the motor and switch. The original cord had been replaced by the previous owner.

Simplicity itself.









The new Silvey Swing Arm grinders have a different motor with small vent holes around the sides that is bolted on differently. Also the chain holder on the new style can be raised up and down.
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6369
  • Karma: 228
  • For The Love Of Chainsaws
  • Location: NCO
Re: Square Grinders
« Reply #12 on: December 19, 2012, 10:15:11 pm »
Notice in the pictures of these different grinders, they all use the same size 8" wheel, but you see a gray one, a white grinding wheel and a couple salmon color wheels. The white is easy to see but disappears faster than the others. Silvey recommends the salmon wheel which you can get from Silvey, or all of them from Bailey's or Madsens.
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6369
  • Karma: 228
  • For The Love Of Chainsaws
  • Location: NCO
Re: Square Grinders
« Reply #13 on: December 20, 2012, 07:10:38 am »
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









We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline mdavlee .

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 1811
  • Karma: 158
Re: Square Grinders
« Reply #14 on: December 20, 2012, 07:27:44 am »
That's the best pictures I've seen of a pro sharp. I would like one but never would come off with the money.

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6369
  • Karma: 228
  • For The Love Of Chainsaws
  • Location: NCO
Re: Square Grinders
« Reply #15 on: December 20, 2012, 09:04:30 am »
Here are a series of Silvey Razur Sharp II Square Chain Grinder Pictures. The grinder is more related to the swing arm grinder than the Pro Sharp series. The Razur Sharp differs from the swing arm in that it has two separate chain holders. One on each side. You sharpen the right hand cutters on one side and then move the chain over to the other side to do the left hand cutters. The chain holders are mounted on a common slide mechanism fed by a single lever on the end of the machine. This grinder is commonly mounted on a tripod style stand. Actually, the grinder is light enough that it can be moved out of the way when not needed. This particular one is not mounted on a stand but is setting on a piece of slab wood on a big rock. It was moved out doors for the pictures.


Silvey Razur Sharp II Square Grinder Over All View from Feed End.


Silvey Razur Sharp II Top View from the mounting end. Note the mounting hole at the bottom of the picture where the grinder assembly mounts on the stand. Also take note of the off-on switch mounted on the motor. Typically, the switch is pulled towards you when you are in the operator's position to make the grinding wheel turn in the proper direction to approach the cutter tooth you are sharpening from the outside. I this picture you can see the two grinding wheel dressers. There's one for the edge of the wheel that shapes the side of the chain cutter tooth and there's one for the top of the wheel that forms the top plate angle on the chain's cutter tooth.



Silvey grinder mounting stand for Razur Sharp II and Swing Arm Grinders. This is a older model and not the current design shown in the downloadable operator manuals.


Silver Razur Sharp II and disassembled stand


Silvey Razur Sharp II showing detail of adjustment to compensate for grinding wheel wear. Look at some of the over all pictures to take note of this bolt's location.


Silvey Razur Sharp II grinder showing slide assembly, bellows type dust guard, feed stops, and chain stop adjustments. The feed handle extends from the bottom center of the picture. This lever is also shown a couple pictures above this one.


Silvey Razur Sharp II showing right hand chain holder detail including chain stop and adjustment, and feed stop adjustment knob. This assembly is duplicated in reverse on the other side of the grinder for the left hand cutters.


Simington S-495 Grinder made like a Silvey Razur Sharp I. Notice the "Blue Wheel" that cost twice as much as a Salmon wheel and lasts a little longer.


We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6369
  • Karma: 228
  • For The Love Of Chainsaws
  • Location: NCO
Re: Square Grinders
« Reply #16 on: December 20, 2012, 08:48:39 pm »
Using a late model Silvey Swing Arm grinder

http://www.youtube.com/watch?v=Lnqpq2-cubc

This is SRCarr's Razur Sharp II after he trued up everything and made a new slide using cam followers on a red neck milling machine using a heavy drill press and a HF feed table.

http://www.youtube.com/watch?v=-WD4MaAfSwM

http://www.youtube.com/watch?v=bPypqFbI_vk

Brad Snelling's Razur Sharp II grinder. Notice where someone has run the chain stops into the wheel  . . .

http://www.youtube.com/watch?v=A5g8TyXUDHs

Rich Dougan the Chainsaw Guy and his ZygMyer square grinder. Take notice that this grinder has a mist type cooling system to keep the chain tooth cool.

http://www.youtube.com/watch?v=MSHiIb2Tgwg
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 17847
  • Karma: 334
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Square Grinders
« Reply #17 on: December 21, 2012, 10:16:59 pm »
Somebody is reading and learning this stuff big time.  8)

I dont think I am smart enough to use them there fancy square grinders.   :P
REDNECK Saw Repair Getter Done

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6369
  • Karma: 228
  • For The Love Of Chainsaws
  • Location: NCO
Re: Square Grinders
« Reply #18 on: December 21, 2012, 11:15:15 pm »
One glimpse at the grinding wheel in these pictures tells me that the all important corner is dull and needs to have the dirty color lightly dressed from the corner and another light pass taken on the cutters before the chain sharpening is finished. I can tell that the top angle on the stone is dull because it has a dirty look to it right at the corner.



Even watching this video of the German sharpener, I can see the grinding wheel is dirty in the corner as Rich is taking pretty healthy cuts on the chain. He will need to touch up the stone and make a light pass on the chain before it is finished. You will notice that the top side of the corner gets dull first as it has to do the most cutting.

http://www.youtube.com/watch?v=MSHiIb2Tgwg
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Online 3000 FPS

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 3975
  • Karma: 218
  • Location: Carpenter, Wyoming
Re: Square Grinders
« Reply #19 on: December 21, 2012, 11:33:28 pm »
Very nice presentation 660magnum.   It is great reading and full of lots of good information.  I would like to have a square grinder but I am not up for the kind of money it takes.
PP 505, 475, 445.

 

Related Topics

  Subject / Started by Replies Last post
177 Replies
4371 Views
Last post March 04, 2016, 04:45:17 pm
by dutchsawdoctor
3 Replies
287 Views
Last post October 26, 2012, 05:14:03 pm
by Playinwood
22 Replies
439 Views
Last post January 02, 2013, 07:03:13 pm
by mdavlee
2 Replies
382 Views
Last post February 10, 2013, 08:09:53 pm
by Al Smith
26 Replies
548 Views
Last post October 26, 2013, 10:51:48 pm
by HolmenTree
14 Replies
373 Views
Last post December 25, 2013, 01:07:42 pm
by Cut4fun .
2 Replies
237 Views
Last post May 03, 2014, 12:47:51 am
by 660magnum
20 Replies
211 Views
Last post December 20, 2014, 06:12:22 pm
by 660magnum
28 Replies
675 Views
Last post December 14, 2015, 12:05:10 am
by Philbert
3 Replies
176 Views
Last post December 13, 2015, 11:47:19 pm
by Philbert