Alan
E-xcellent poster
Posts: 234
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Post by Alan on Feb 23, 2009 13:08:01 GMT
Can anyone advise ? I would like to buy a wheel dresser for my small bench grinder, there seems to be two types 1) seems to be a rod with a diamond point to it. (2) other seems to be a small serrated wheel with handle attached. both are inexpensive but i do know which gives the best results.
Regards
Alan
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Post by Staffordshirechina on Feb 23, 2009 13:53:55 GMT
Go for the single point diamond type. You may need to make a holder that will slide across your grinding rest edge to keep the point parallel across the face of the wheel.
The single point ones are what are used to true and freshen surface and cylindrical grinding wheels too.
When you dress your wheels, have the vacuum cleaner running to catch the dust - it goes everywhere otherwise!.
Les
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Alan
E-xcellent poster
Posts: 234
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Post by Alan on Feb 23, 2009 15:12:56 GMT
Thanks Les
Will take your advice
Alan
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Post by Old Biker on Feb 23, 2009 20:06:52 GMT
Don't forget that single point diamond dressers need a negative rake approach to the wheel.
Mark
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Alan
E-xcellent poster
Posts: 234
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Post by Alan on Feb 23, 2009 20:45:50 GMT
Mark, does this mean that the Dresser needs to point downwards ?
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Post by houstonceng on Feb 23, 2009 21:12:20 GMT
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Post by Staffordshirechina on Feb 24, 2009 10:53:07 GMT
Alan, yes, Mike means pointing down. Effectively dragging against the wheel rather than upwards and digging. Only a few degrees.
Les
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Post by dickdastardly40 on Feb 24, 2009 15:26:04 GMT
An alternative to the start type dresser or diamond rod is a piece of old grinding wheel which is harder than the one being dressed.
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abby
Statesman
Posts: 927
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Post by abby on Feb 24, 2009 19:46:16 GMT
Just what I use Dick , I have only seen diamond sticks used for surface grinders , I have an inch square block about 3 inches long that is at least 30 years old but still has some true edges left.
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dva
Seasoned Member
Posts: 110
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Post by dva on Feb 25, 2009 13:25:40 GMT
I was told (and practice) with surface grinders always to ensure that the table-mounted single point diamond is always contacting the wheel just after the center line. NEVER before it.
Dave
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Post by jonkett on Feb 25, 2009 22:01:58 GMT
I always thought the Huntington (star wheel) type of dresser was the easiest to use. You only need a size 0, good for upto 20" in dia. The Cast iron holder has two lugs at the bottom which hook over the grind machine rest, you hands are then a long way away from the wheel and the rest i s easy. The diamond types are usualy on a round shank which then needs some sort of holder to be held rigidly on the machine and a means of traversing it across the wheel. Which is why i believe them to be only usefull on a surface or cylindrical grinder.
By the way did you know that depending on how you dress a wheel you can change it's behaviour the extent that you can make 60 grit wheel in to a 46 or even an 80 grit wheel.
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Post by Tim Bayliss on Mar 4, 2009 16:02:04 GMT
A round shank diamond type can certainly be used on a benchgrinder but a firm 2 fist hold and good strong tool rests are required to ensure the wheel is dressed square. The star wheel types are easier for beginners but can scare the daylights out of you with the noise and vibration on first use. Incidentally for all those still using bench type wheel grinders (belt grinders are generally better and safer) I would suggest you take the RoSPA or similar Abrasive Wheel course, you'll learn a lot and may save yourself a bad injury. At all times, when using or dressing an abrasive wheel ALWAYS use a pair of safety goggles minimum and preferably a full face visor to EN 166 B, safety glasses to EN 166 F are not up to it.
Tim
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