Author Topic: Square Grinders  (Read 5842 times)

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Online 660magnum

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Re: Square Grinders
« Reply #50 on: February 12, 2013, 11:18:02 pm »
Simington would be my choice right now . . .

Maybe as a stop gap - did you try Emailing him?
http://simingtonchaingrinder.com/contact-simington/

or order it on line?
http://simingtonchaingrinder.com/2013/s-451-c-high-production-grinder/
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Offline mdavlee .

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Re: Square Grinders
« Reply #51 on: February 13, 2013, 04:40:50 pm »
They'll answer the phone sometimes. If you leave a message they'll call back.

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Re: Square Grinders
« Reply #52 on: February 13, 2013, 04:46:17 pm »
They'll answer the phone sometimes. If you leave a message they'll call back.

So far I have left an email called and left messages on office phone and cell phone and tried to order one online and all have failed.   I will give them a few more days to see what happens.   So far not very impressive.
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Re: Square Grinders
« Reply #53 on: February 13, 2013, 05:21:36 pm »
There's always Madsen's and the Silvey for $135 more?
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Re: Square Grinders
« Reply #54 on: February 13, 2013, 05:34:46 pm »
This is Kelly Peil's other website and main business but the telephone is the same. It is the cattle chute business.

http://www.saltcreekindustries.com/contact-salt-creek/
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Re: Square Grinders
« Reply #55 on: February 13, 2013, 06:40:59 pm »
I will be patient and give it alittle more time.   Question is the silvey worth a 135 more and with a company no longer in buisness. 
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Re: Square Grinders
« Reply #56 on: February 13, 2013, 09:49:19 pm »
Actually, unless some unauthorised person destroys the stops or throws it over, it is unlikely you will ever need any part for a swing arm other than grinding wheels. I think the main wheel manufacturer is Pacific Grinding Wheel? The Italian Molemabs are not normally the ones you want. I replaced most of the fasteners and all the washers and springs on my 34 yr old grinder with parts from the hardware store.  I wanted new bearings for my swing arm and had a choice of three different stores in town to get them. SRCarr put new bearings in the motor of his RZII but he got them locally. The fiber washers for under the diamond dresser arms on my grinder were marginal but I got new ones at the hardware store.
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Re: Square Grinders
« Reply #57 on: February 14, 2013, 01:33:51 am »
I came across some pictures of a old Simington 450 last fall that was for sale. Appears to have sat in a barn for a few years as shown by the bird nest material around the motor? Likely so of that bird residue is inside the open motor also so it should be blown out? This grinder probably dates from the early 80's? Take note that the Simington 450 is almost identical in every way to the early Silvey Swing Arm grinder with even the same motor.

Also upon examination of the pictures, someone has played with the left hand chain stop and ground it down thin on the top and bottom. The chain or cutter stops on the early Silvey and Simington 450 Swing Arm grinders are just made from 1/4" key stock anyway. They can can be made with a drill and bit, hacksaw, and file. You can get the key stock at the hardware store.

This grinder's arm has been shimmed with an extra washer to lower the arm for possibly grinding "404" chain? The washer part of the thrust washers used on this grinder's arm are normally .063" thick. But you can get them in .032"  and .016" just as readily to use to shim the arm higher or lower by substituting a thinner washer or adding a washer thickness of your choice. Also the grinding wheel can be raised or lowered on the motor to do the same thing.

In the bottom picture you can see the back side of the arm where there are two holes for the chain holder. The rear hole is for the work chain style interior grinding angles. My Silvey grinder has a slotted hole in the chain holder from the center forward. In theory, I could also turn the chain holder around and have adjustment in the other direction from center to change the interior angles.

In the middle picture, if you look closely, the main frame has been tapered above the vertical diamond dresser to allow more variation in adjustment to give more positive lead on the vertical exterior angle of the chain. On some of these style grinders, the diamond dresser is mounted farther out on the other side of the tilting block and it is not necessary to relieve the main frame. With the dresser arm on the outside of the angle block, the dresser has to extend out farther which increases the potential of chatter in the dresser. On my old Silvey, the angle block is mounted farther out and the dressing arm is on the inside of the angle block to try to achieve the best of both worlds.

So you can see that there are a lot of adjustment possibilities if that is your bag. Most likely your grinder experience will be a set and forget it one?

There is a picture of the motor name plate as well as the right and left sides of the grinder.
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Re: Square Grinders
« Reply #58 on: February 14, 2013, 04:26:44 am »
In my mind there are two kinds of square grinders, those that swipe the chain tooth across the grinding wheel and then there are a couple square grinders that bring the chain tooth into the grinding wheel at a common angle to the corner of the chain.

The swiping designs include the Silvey and Simington Swing Arms as well as the Silvey Razur Sharps and the old Simington S-495 which is identical to the Silvey Razur Sharp I design. The design problem with these is that the corner of the horizontal portion of the grinding wheel does all the work. To do a nice chain grind, even on a 60DL chain, after you go around the cutters, you need to dress the grinding wheel to clean up the corner and make another light pass over the cutters before you proclaim the chain sharp.

With the Silvey Prosharp and SDM4 grinders the chain cutter is presented to the working part of the grinding wheel all at once. Therefore with these grinders the grinding wheel stays sharp longer. But the grinders have a high parts count and resulting wear points with few of them available at the hardware store. These grinders cost 60% to 100% more than the swing arms new.

So it is a trade off.
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Re: Square Grinders
« Reply #59 on: February 14, 2013, 10:36:48 am »
I understand what you are saying about the two.

For me dressing the grinding wheel a second time to get it nice and crisp for a second pass is not a big enough deal to warrant that kind of increase in cost.    When you can still get the same results in the end on either grinder I would deal with that short coming of a swing arm.
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