cwdiver
having dreams about rocks
Work is just Surface Interval
Member since October 2015
Posts: 57 
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Post by cwdiver on Apr 4, 2016 17:53:41 GMT -5
I am having a few problems with our 60 yro. Hillquist 24" saw. first - replaced blade (poor cutting) second- replaced motor (burned out). Saw still seems to bind and stall motor, tripping overload . Noted minor play in vise. Is there a way to test if carriage and blade are true and parallel with each other ? I also noticed the blade wearing on the off side. causing the cut to wander to this side. I suspect the carriage is not parallel but do not know how to test or adjust this . Any help or suggestions would be much appreciated . Thank Gary |
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ajrknapper
off to a rocking start
Member since December 2013
Posts: 16
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Post by ajrknapper on Apr 4, 2016 22:30:33 GMT -5
put a pencil in the vice and move it against the blade then move the carriage down the track if it goes into or away from blade it is out of alignment
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Post by Rockoonz on Apr 4, 2016 23:33:42 GMT -5
If the blade isn't perfectly flat, (few of them are) then your results will be meaningless.
Mark a spot on the blade about an inch in from the edge and clamp a dowel into the vice, then bring the dowel towards the mark with the vice cross feed until you feel resistance against a thick feeler gauge.
Remove the gauge without moving the cross feed. Carefully move the vice carriage to the rear of the saw. Rotate the blade to line up the mark with the dowel and check again. There should be little or no difference.
Does your Hilquist still have the lever and sprag clutch driven vice feed?
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QuailRiver
fully equipped rock polisher
Member since May 2008
Posts: 1,640
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Post by QuailRiver on Apr 5, 2016 0:54:26 GMT -5
I am having a few problems with our 60 yro. Hillquist 24" saw.... I also noticed the blade wearing on the off side. causing the cut to wander to this side.... While a misaligned carriage may cause a blade to wear more on one side or the other, it should be noted that new MK and Barranca imported 301 and 303 blades now come with an offset kerf. The kerf is thicker on the right side (normally the vise side) than they are on the opposite side (normally the pulley side)of the blade. Same is true of the last two new Raytech Black Blazer Blades I've purchased. The USA manufactured ones used to all come from the factory with equal kerfs on both sides and were reversible, but no longer with the imported ones. I have had to discard several blades with lots of diamond left on the edge and right side kerf simply because the thinner left side kerf wore down too soon. And that was with just normal wear on well kept and aligned saws. I sure miss good Made In the USA quality! Larry C. |
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Post by Peruano on Apr 5, 2016 7:01:42 GMT -5
Or are you expecting to much from a very large saw (i.e. cutting very large rocks). If it was mine, I'd also check alignment by running a small rock through nearly all of the way and then stopping the saw and checking to see if the rock is binding when you try to pull back the vice/sled. If the grooved rock does not let loose of the blade, you probably have a binding problem. Its easier to diagnose a problem with small rocks than when you have the saw's capacity stretched to the limit (unless that exactly the type of sawing that you want and need to do).
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cwdiver
having dreams about rocks
Work is just Surface Interval
Member since October 2015
Posts: 57
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Post by cwdiver on Apr 8, 2016 22:53:46 GMT -5
Or are you expecting to much from a very large saw (i.e. cutting very large rocks). If it was mine, I'd also check alignment by running a small rock through nearly all of the way and then stopping the saw and checking to see if the rock is binding when you try to pull back the vice/sled. If the grooved rock does not let loose of the blade, you probably have a binding problem. Its easier to diagnose a problem with small rocks than when you have the saw's capacity stretched to the limit (unless that exactly the type of sawing that you want and need to do). Thanks for the suggestions, This saw had no problem cutting large rocks of all sources after the new blade was installed. Replaced motor (old one was bogging down ) Saw still bogging down on large stones, blade deflecting away from vise. Cuts 4" stone no problem. Blade has no kerf on the non vise side left on it. This new blade does not have many cuts on it < 100 Has been dressed several times within these cuts. Question is this $1100 blade shot ? cause ? do not want to put good money in until problem is solved . Thanks again Gary
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QuailRiver
fully equipped rock polisher
Member since May 2008
Posts: 1,640
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Post by QuailRiver on Apr 9, 2016 1:03:06 GMT -5
[/quote] Thanks for the suggestions, This saw had no problem cutting large rocks of all sources after the new blade was installed. Replaced motor (old one was bogging down ) Saw still bogging down on large stones, blade deflecting away from vise. Cuts 4" stone no problem. Blade has no kerf on the non vise side left on it. This new blade does not have many cuts on it < 100 Has been dressed several times within these cuts. Question is this $1100 blade shot ? cause ? do not want to put good money in until problem is solved . Thanks again Gary
[/quote] Would it be possible for you to post a close-up photo of the kerf and cutting edge of the blade? And also, if you do not think it is a carriage misalignment problem then if you could let us know in what way, and using what medium (dressing stick, fire brick, old SC wheel?)and how frequently you dressed the blade it might be helpful in figuring out what is going wrong. Larry C. |
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Post by snowdog on Apr 11, 2016 20:47:20 GMT -5
I would check belt tension and possibly slow down the feed rate ------ I've had some similar problems on my 18" and found that if I try to feed it too fast it (the blade) will heat up and start to warp (usually away from vise)-- then when it cools down it returns and you can't tell anything is wrong ----smaller rocks don't have enough rock/blade tension to get hot enough to warp it
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Post by johnjsgems on Apr 13, 2016 17:27:30 GMT -5
What blade is it? I see you are from BC so guessing you are including shipping and duties but $1100? In USA from right dealer you could buy 2 MK/BD 303S blades for about that. If you truly have no kerf on one side it could bind. Try hammering edge flat too to see if that helps.
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cwdiver
having dreams about rocks
Work is just Surface Interval
Member since October 2015
Posts: 57
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Post by cwdiver on Apr 14, 2016 23:08:04 GMT -5
Thanks to all, for the tips. Won't be back to club saw shed until next week . Going to reverse the blade and slow feed rate down some. Had this problem dropped into my lap . Will try and send pictures of blade and saw itself. Not sure what hammering the blade will accomplish ?? other than relieving some frustrations . Hillquist little help other than selling us a new saw. Thanks again............Gary |
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QuailRiver
fully equipped rock polisher
Member since May 2008
Posts: 1,640
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Post by QuailRiver on Apr 14, 2016 23:45:41 GMT -5
Thanks to all, for the tips. Won't be back to club saw shed until next week . Going to reverse the blade and slow feed rate down some. Had this problem dropped into my lap . Will try and send pictures of blade and saw itself. Not sure what hammering the blade will accomplish ?? other than relieving some frustrations . Hillquist little help other than selling us a new saw. Thanks again............Gary When you reverse the blade you will need to dress it again before you use it to get the diamond particles exposed in the right direction. If the kerf is completely worn down on one side I don't know that reversing it will help but it's worth a try if it gets you a little more use out of the blade. And I think when John suggested hammering the blade he meant tapping it on the cutting edge to flatten the cutting edge and flair the kerf. It's a technique that takes a little practice to master.  Larry C. |
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Post by johnjsgems on Apr 15, 2016 10:25:15 GMT -5
Excellent Larry. I have lost many blade orders by suggesting they try hammering before replacing. If blade is a 303S or 301 reversing won't help much as diamonds are oriented in the matrix to cut in one direction. If one of the old notched rim blades it is reversible. If Chinese crimp rim also probably non directional.
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cwdiver
having dreams about rocks
Work is just Surface Interval
Member since October 2015
Posts: 57
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Post by cwdiver on Apr 19, 2016 20:03:37 GMT -5
Excellent Larry. I have lost many blade orders by suggesting they try hammering before replacing. If blade is a 303S or 301 reversing won't help much as diamonds are oriented in the matrix to cut in one direction. If one of the old notched rim blades it is reversible. If Chinese crimp rim also probably non directional. Thanks John, The blade we bought is a MK 305 Pro. Directional . Blade is installed correctly. No or very little kerf on edge away from vise. Closer inspection shows main arbor bearing badly worn . Ordered new bearings will install this weekend. In your honest opinion do you think this blade is still useable ? Thanks again Gary
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Post by johnjsgems on Apr 20, 2016 11:07:13 GMT -5
Gary asked me on PM but for anybody else I said to try it after replacing bearings and after alignment. Also hammer edge if edge is rounded rather than flat. Also if he replaces blade switch to 303S. Thinner and good choice for lapidary saw. 305 is a good blade but very thick and designed for high speed water cooled masonry saws.
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cwdiver
having dreams about rocks
Work is just Surface Interval
Member since October 2015
Posts: 57
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Post by cwdiver on Apr 20, 2016 23:53:22 GMT -5
Gary asked me on PM but for anybody else I said to try it after replacing bearings and after alignment. Also hammer edge if edge is rounded rather than flat. Also if he replaces blade switch to 303S. Thinner and good choice for lapidary saw. 305 is a good blade but very thick and designed for high speed water cooled masonry saws. Thank you John for your honest answer. If our blade continues to give us grief after repairs and set up, can I P.M. you for a price quote for a 24" 303s blade delivered to Vancouver Island B.C. ? Thanks again Gary
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Post by johnjsgems on Apr 21, 2016 10:14:32 GMT -5
No problem.
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