Modify Carbide Tool

BOOT · Monday at 11:43 PM

Have a tool with carbide tips that attached to a drill to cut pockets and I want to reshape/shorten the cut to make it cut less OD diameter of the pocket. I don't need to remove much just 0.025 off each side.

What would be the best diy way to do this w/o ruining the carbide tips? Simply grind them down with an abrasive cut off wheel or grinder?

DanASM · Tuesday at 6:13 AM

Grind it with a diamond wheel. They can be expensive, but cheaper ones can be found.

DDoug · Tuesday at 7:34 AM

Planning a re-boot eh ?

Best way to dull a tap

You forgot about duct tape. 7 words you will never hear a Redneck say: "Oh gosh! Duct tape won't fix that!"

www.practicalmachinist.com

michiganbuck · Tuesday at 7:47 AM

It takes a diamond wheel of 120 Gt or finer to make a decent/OK edge on a carbide cutting tool ..and wet helps it grind with no chipping, A smooth-dressed green wheel can sometimes make an OK grind.
Too bad, you did not list your location as someone close might have a diamond wheel.
Small diamond wheels can be had for low prices, likely $15+.
X Avoid electro-plated wheels because the diamond layer is thin.

Shars 4" Diamond Straight Cup Wheel New P| | eBay

WHEEL SHAPE Flaring Cup. SUPERABRASIVE DEPTH (DIAMOND OR CBN) 1/8. WHEEL TYPE D11A2. WHEEL THICKNESS 2. You may ask for freight cost before buying tools. If you need to speak to a sales person feel free to call.

www.ebay.com

6-inch Diamond Grinding Wheels Resin Bonded Flat Abrasive Wheel 240 Grits 75% 714998640826 | eBay

Description:Resin bond synthetic diamond flat grinding wheel is mainly used for surface grinding and external grinding.Diamond abrasives have the characteristics of high hardness, high compressive strength and good wear resistance, so the diamond grinding wheel is a suitable tool for...

www.ebay.com

BOOT · Tuesday at 10:12 AM

DDoug said:
Planning a re-boot eh ?

Best way to dull a tap

You forgot about duct tape. 7 words you will never hear a Redneck say: "Oh gosh! Duct tape won't fix that!"

www.practicalmachinist.com

WOW I'm glad you don't charge rent, I'd be out so much money all those Years living in your head, rent Free

Doesn't this board have an off-topic section? You might wanna make a post there for your fan club, instead of hi-jacking mine. Anyways don't forgot to click the link in my signature. You can go there and dislike my videos or leave me nasty anonymous comments, that'll teach me. I'm tearing up just now thinking bout it!

BOOT · Tuesday at 10:16 AM

michiganbuck said:
It takes a diamond wheel of 120 Gt or finer to make a decent/OK edge on a carbide cutting tool ..and wet helps it grind with no chipping, A smooth-dressed green wheel can sometimes make an OK grind.
Too bad, you did not list your location as someone close might have a diamond wheel.
Small diamond wheels can be had for low prices, likely $15+.
X Avoid electro-plated wheels because the diamond layer is thin.

Shars 4" Diamond Straight Cup Wheel New P| | eBay

WHEEL SHAPE Flaring Cup. SUPERABRASIVE DEPTH (DIAMOND OR CBN) 1/8. WHEEL TYPE D11A2. WHEEL THICKNESS 2. You may ask for freight cost before buying tools. If you need to speak to a sales person feel free to call.

www.ebay.com

6-inch Diamond Grinding Wheels Resin Bonded Flat Abrasive Wheel 240 Grits 75% 714998640826 | eBay

Description:Resin bond synthetic diamond flat grinding wheel is mainly used for surface grinding and external grinding.Diamond abrasives have the characteristics of high hardness, high compressive strength and good wear resistance, so the diamond grinding wheel is a suitable tool for...

www.ebay.com

Thx I actually read a bit bout diamond wheels But never hurts to ask, well some places it's more of a hassle now that I rem. Anyways just figured some with EXP might know of a diy round about way. Still $15 isn't that bad and I'm not too cheap. Just why spend a ton of money on a tool you'll use one or twice, got plenty of those LOL

Your right I should and normally do have my location on my profile, I'm near Flint Michigan

fciron · Tuesday at 10:20 AM

I do ok sharpening carbide lathe tools with the green grinding wheels. They’re easily available in local stores.

michiganbuck · Tuesday at 10:26 AM

Back in the day, the early 60s and past green wheel finishing carbide was common because natural diamonds were so expensive.
As manufactured diamonds became more popular wheel prices came way down.

BOOT · Tuesday at 10:53 AM

fciron said:
I do ok sharpening carbide lathe tools with the green grinding wheels. They’re easily available in local stores.

Thx, you mean something like this(just what I found with a quick goolge) https://www.amazon.com/Pearl-Abrasi...ba-b5c9-168106c6fb15&pd_rd_i=B00TTX9VEA&psc=1 I read a bit bout silicon carbide grinding wheels as well and actually since my tools are limited compare to the members here, a grinder wheel would prob be more ideal.

Saw one that was 60 grit but figured 120 grit or finer like Michiganbuck said and again I'm not taking off much. Bit by bit n measure till I'm good.

BOOT · Tuesday at 10:55 AM

Still just thought bout it, not sure how hard it is to dress one of those wheels?

rons · Tuesday at 11:26 AM

BOOT said:
What would be the best diy way to do this w/o ruining the carbide tips? Simply grind them down with an abrasive cut off wheel or grinder?

Just don't use water or anything else to cool down the carbide. You can let it get red hot.
You can use a regular abrasive wheel but it will take longer.

Gordon Heaton · Tuesday at 11:31 AM

A diamond wheel is so affordable now that to me it's not even a question. The green wheels just do not compare. That said, run the diamond wheel WET, every time, to greatly prolong its life. You'll be surprised how often you find a use for it. It'll grind stone and glass too.

Overland · Tuesday at 11:44 AM

michiganbuck said:
Back in the day, the early 60s and past green wheel finishing carbide was common because natural diamonds were so expensive.
As manufactured diamonds became more popular wheel prices came way down.

But my wife can tell the difference.
Costs me a fortune.......

BOOT · Tuesday at 12:28 PM

Gordon Heaton said:
A diamond wheel is so affordable now that to me it's not even a question. The green wheels just do not compare. That said, run the diamond wheel WET, every time, to greatly prolong its life. You'll be surprised how often you find a use for it. It'll grind stone and glass too.

I use a diamond dresser for cleaning my loaded up die grinder stones or reshaping them, also dressing my grinding wheels of course. https://www.ebay.com/itm/3849260162...HSNbIpWLvDs+5fPZAvo5+n5O+3|tkp:Bk9SR_yI2o-4YQ

BOOT · Tuesday at 12:31 PM

Suppose something like these might do fine https://www.amazon.com/Diamond-Grin...cphy=9017065&hvtargid=pla-1643839275829&psc=1

https://www.amazon.com/Diamond-Grinding-Grinder-Ceramics-78x12-7x10mm/dp/B07JFX6K19/ref=pd_bxgy_vft_none_img_sccl_2/142-7089189-5091841?pd_rd_w=RG8qx&content-id=amzn1.sym.7f0cf323-50c6-49e3-b3f9-63546bb79c92&pf_rd_p=7f0cf323-50c6-49e3-b3f9-63546bb79c92&pf_rd_r=2ZGKQHSZ5CZS598QWQM8&pd_rd_wg=ZIoAz&pd_rd_r=b4d62cbc-0ce2-4474-8d9e-5559295edde3&pd_rd_i=B07JFX6K19&psc=1

michiganbuck · Tuesday at 12:48 PM

NO< the first wheel is a plated wheel ..the diamond layer is not very thick and off-hand grinding will quickly wear through the plating in one place.
Plated wheels are good/best for a part with a similar surface as the wheel so one certain place of the wheel surface/plating is not used more than another..and for a shape/form where dressing the form would waste a lot of a standard wheel... and then they should be indicated in on the surface being used to .001 or less, so one side does not wear through first and leave a lot of unusable diamond on the other side.

Good to search for the thickness of the diamond portion.
The description "Plated" might be anything

BOOT · Tuesday at 1:12 PM

So when I look at something like this https://www.amazon.com/Lapidary-Gri...SLQMJLL/ref=psdc_256167011_t1_B07JFX6K19?th=1 that says "Diamond Coated" is that the same as plated?

BOOT · Tuesday at 1:15 PM

Stupid question, do they make Diamond grinding bits that I could use in a hand grinder? Like 1/4" shank

michiganbuck · Tuesday at 1:37 PM

OT: (that says "Diamond Coated" is that the same as plated?)
yes .

Point-mounted diamond-coated burrs are made but they are mostly not a fine enough grit for tool sharpening I would guess. I have never tried them for any sharpening.

BOOT · Tuesday at 1:47 PM

Also to be clear, I know there was a couple dia wheels suggested/linked from ebay but I got just basic bench grinders and those dia wheel/cup are a 1-1/4 hole. There are bushings, adapters n so on but if I can get something closer to fit a basic grinder w/o too much hassle cost that'd be cool. I don't mind buying some stuff but if I gotta spend to much, why not pay for the job. I do prefer to diy and it may come in handy again, some day if I do get a dia wheel/cup.

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