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Drill bit sharpening jig

bushwacker

By bushwacker
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bushwacker Member

bushwacker

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Hi every-one,

I need to locate some instructions to a small drill bit grinding jig. It is as follows, a small angled plate with a sloted hole in it locates on the bench, and to this is attached a verticle shaft which in turn has a small alluminium casting onto this. Above that is a moveable casting with a vee shaped portion that the drill bit sits in and a square shaft runns from this to the shank end of the drill bit which is adjustable to advanve the drill bit forward to the grinding wheel. I assume that then the jig is moved in a lateral movement to regrind the cutting faces of the drill bit.

 

The only way that I see the jig working is if it uses the side of the grinding wheel, which is a strict No NO. Can any one help me please, if they have a jig of a similar nature would you consider scanning a sending me a copy of the instructions if you have them please. Screw fix sell one near enough the same I believe, but that has no instruction s on it's use included.

 

Thanks every one, I will take a pic of the jig asap ans post it on here to assist in it's identification.

 

 

Phill.

drill_jig_resized.bmp

drill_jig_resized.bmp

Edited by bushwacker

"The early bird catch's the worm.............................................................................but the second mouse gets the cheese"

"Amatuers built the ark...........................................................................................................proffessionals built the titanic"

 

"All mushrooms are edible..........................................................................................................................some only once"

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bushwacker Member

bushwacker

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Can any-one tell me an easy way to attach a pictuer to this topic or even put one on for me if I mail it to the.

"The early bird catch's the worm.............................................................................but the second mouse gets the cheese"

"Amatuers built the ark...........................................................................................................proffessionals built the titanic"

 

"All mushrooms are edible..........................................................................................................................some only once"

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ayjay Member

ayjay

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Like this :D

 

post-1421-1170351192_thumb.jpg

 

either go to somewhere like photobucket or imageshack and upload it onto there, then use the *insert image tags* above

 

 

or,

 

 

click on browse below the reply box

 

find the pic on your computer

 

upload

 

click on manage attachments

 

 

 

 

have a go, and if it all goes t*ts up we can soon sort it out

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bushwacker Member

bushwacker

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Thanks Jon, yet again you've helped me out.

 

Cheers,

Phill

"The early bird catch's the worm.............................................................................but the second mouse gets the cheese"

"Amatuers built the ark...........................................................................................................proffessionals built the titanic"

 

"All mushrooms are edible..........................................................................................................................some only once"

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ayjay Member

ayjay

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It would probably be easier if you saved the pics as jpegs.

 

Looking at the contraption (pics a bit small) I don't see why you think it has to run on the side of the wheel. It looks to me like it's designed to work on the edge, I would suspect that the square shaft allows you to turn the drill by exactly 90 deg in the V slot and get a true edge on both faces, unless I've got hold of the wrong end of the stick.

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bushwacker Member

bushwacker

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If you run the drill bit on the circumference of the wheel it, because the jig moves side to side it it grinds the bit with a radius instead of a nice neat and true flat edge. The shaft only locates the rear of the drill bit, but the two 45deg mitres (one at the front and one at the rear) have the drill bit in them. I may be missing some thing here so you have any ideas please let me hear them.

 

A guy that I know has a similar drill jig to the one shown, but his uses the side of the wheel, and as you more than likely know it's not a good idea to do this. I very rarely see the guy so can't ask him if he can explain how it works or even if he has any destructions for it. I did a search for them but didn't come up with any results. I've just to hope now.

 

Phill

"The early bird catch's the worm.............................................................................but the second mouse gets the cheese"

"Amatuers built the ark...........................................................................................................proffessionals built the titanic"

 

"All mushrooms are edible..........................................................................................................................some only once"

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poledark Member

poledark

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Bushwhacker, I have one of those and it IS used on the side of the grinding wheel.

 

 

Take just a tiny cut each time, turn the drill over,repeat the cut.

 

Adjust to take another little slice off, turn over and repeat.

 

Used mine for years, and sharpened many hundreds of drills, and still no groove in the grinding wheel :)

 

Den PS don't try to sharpen masonry type bits on an ordinary grindwheel, you need a "green grit" one.

Edited by poledark

"When through the woods and forest glades I wanderAnd hear the birds sing sweetly in the trees;When I look down from lofty mountain grandeur,And hear the brook, and feel the breeze;and see the waves crash on the shore,Then sings my soul..................

for all you Spodders. https://youtu.be/XYxsY-FbSic

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bushwacker Member

bushwacker

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Thanks for the info Denise.

As you can well imagine I was very wary of using it on the side of the wheel. I went on a new grinding wheel course in June 2005, after not doing one since I was an Apprentice back in the early 70s.

I have in fact got a green wheel on the wet/dry stone grinder that I use for the engineers lathe, as well as the tools for the wood lathe. The other grinder just has the good old grey wheel that I use for the drill bits etc, being reasonably accurate free hand (years of practice I suppose) but want to get them really accurate for use on the lathe, and now that I have a good drill press, (a Fobco star engineers drill press) instead of the diy one that I had before I can get the holes a bit more accurately drilled.

 

A hand held pistol type drill isn't that accurate as you never get them 100% square to the job or hold the drill as rigidly as a pillar drill so freehand sharpening was not a problem.

 

Coming back to the drill jig, the small sliding part on the front end I assume, has to be pushed up to locate the cutting edge, then clamp the drill bit with the knurled screw. Move the sliding portion on the square shaft forward and adjust it to enable the second cutting edge to be set at the same distance for grinding that second cutting edge. Am I right?

 

Phill

"The early bird catch's the worm.............................................................................but the second mouse gets the cheese"

"Amatuers built the ark...........................................................................................................proffessionals built the titanic"

 

"All mushrooms are edible..........................................................................................................................some only once"

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poledark Member

poledark

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Yes :)

 

By the way, where did you get the Denise from?

 

Den

"When through the woods and forest glades I wanderAnd hear the birds sing sweetly in the trees;When I look down from lofty mountain grandeur,And hear the brook, and feel the breeze;and see the waves crash on the shore,Then sings my soul..................

for all you Spodders. https://youtu.be/XYxsY-FbSic

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