I have looked on utube but find it lacking on how to construct a tool post grinder. I don't think I want to strap a die grinder in a wooden block to get the job done. Looking for the right sized motor and set up for maybe a pillow block and shaft. Any and all input for ideas would be great. I know that we all don't go out and plunk down up to 2k for a grinder. Thanks dbq49er.
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Looking for input on how to construct a tool post grinder.
- Thread starter dbq49
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What are you looking to do with it? Are you looking to grind your chuck jaws. or todood grinding? Pillow blocks arn't realy a good choice for a TP grinder, thay arn't made for the speed required to get a good finish. What size lathe do you have.
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If your looking to turn hardened carbon steel dead centers, some carbide insert tools will do the job.
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You would need a good tight spindle to get a good finish. Do you have a QCTP on your lathe. I have used a fordom style flex shaft tool in a 1" boring bar holder with good results. I have seen where people have used this for a TP grinder http://www.harborfreight.com/120-volt-circular-saw-blade-sharpener-96687.html If you look at the way it mounts it would be easy to adapt . I plan on getting one for that purpus soon.
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I use my Proxxon rotary tool. A little pricey but a whole different league than the Dremel.
http://littlemachineshop.com/products/product_view.php?ProductID=2891&category=
I have two holders, one that fits on the compound:
http://littlemachineshop.com/products/product_view.php?ProductID=2935&category=
and one that fits in a tool holder:
It makes a pretty light weight tool post grinder but it also is good for slitting with the dremel cutoff discs.
A little cheaper would be the one that they make for the little SEIG lathes:
http://littlemachineshop.com/products/product_view.php?ProductID=4671&category=1
A little small but could easily be adapted to another lathe. And it is only $160
http://littlemachineshop.com/products/product_view.php?ProductID=2891&category=
I have two holders, one that fits on the compound:
http://littlemachineshop.com/products/product_view.php?ProductID=2935&category=
and one that fits in a tool holder:
It makes a pretty light weight tool post grinder but it also is good for slitting with the dremel cutoff discs.
A little cheaper would be the one that they make for the little SEIG lathes:
http://littlemachineshop.com/products/product_view.php?ProductID=4671&category=1
A little small but could easily be adapted to another lathe. And it is only $160
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"What type of bearing do you guys think this grinder will have " Roller, needle, tapered roller" ?
Could you use bronze bushings made on a lathe with oil drip feed or oilite bronze ?
Cheers
dd
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Tapered roller bearings are the way to go. I began planning work on a TPG a while back, but its on the back burner right now. Ray C on this forum made one about a year ago with an excellent write up. Do a search. It might be in the members projects section.
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kd4gij: I do not have qctp. ddmunroe: Your question is inline with my thinking, has anyone used one of these? What kind of quality is in this tpg. It does not mention speed of the tpg or the hp of the motor. As I understand light cuts are the norm and I have seen were some posts across the web have talked about 1/2hp motors. Seems over kill to me. Are the grinder wheels priority to this machine?? On other posts I see 60 and 80 grits being used. What sized arbors are used? I have a long shaft HF die grinder but size limits of stones and vibrations are still a concern of mine. But keep bringing up ideas. On MyMachineShop.net has a simular unit for $300. It looks like the switch is mounted on the top not the side but looks the same after that. I love getting all the info and help. Thanks!!!
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kd4gij: I do not have qctp. ddmunroe: Your question is inline with my thinking, has anyone used one of these? What kind of quality is in this tpg. It does not mention speed of the tpg or the hp of the motor. As I understand light cuts are the norm and I have seen were some posts across the web have talked about 1/2hp motors. Seems over kill to me. Are the grinder wheels priority to this machine?? On other posts I see 60 and 80 grits being used. What sized arbors are used? I have a long shaft HF die grinder but size limits of stones and vibrations are still a concern of mine. But keep bringing up ideas. On MyMachineShop.net has a simular unit for $300. It looks like the switch is mounted on the top not the side but looks the same after that. I love getting all the info and help. Thanks!!!
Do you have the electric HF grinder or the air. Eather one should work fine. Just make an aluminum mount for your cross slide. Thay should take 1/4" shank stones. You caould make an arbor for a larger wheel
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