SKU: 58268772684

PRO-TECH PLUNGE CUTTING BALL 1/2' X 1/2' 1/4'SHANK KP216021

Sale price$103.33 Regular price$114.81
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Description

PRO-TECH PLUNGE CUTTING BALL 1/2' X 1/2' 1/4'SHANK KP216021Ball cutting router bit Carbide Tipped Cut channels for pipes or cables using the ball end bit. The profile requires the cut to be made in a single pass. To reduce stress on the bit, cut an initial groove using a straight bit matching the diameter dimension of the ball end bit. Cut channels for pipes or cables using this ball end bit. Uses include: 2 Flute Industrial quality Carbide tipped To reduce stress on the bit, cut an initial groove using a

Ball cutting router bit

Carbide Tipped

Cut channels for pipes or cables using the ball end bit. The profile requires the cut to be made in a single pass. To reduce stress on the bit, cut an initial groove using a straight bit matching the diameter dimension of the ball end bit. Cut channels for pipes or cables using this ball end bit.

Uses include:

  • 2-Flute
  • Industrial quality
  •  Carbide tipped

 

To reduce stress on the bit, cut an initial groove using a straight bit matching the width dimension of the ball end bit. Profile is used as a conduit for cables and pipes. Note: The profile requires the cut to be made in a single pass.

 

This router bit has a 6,35 mm shank (shaft) that will fit most small routers. Please ensure that you select a router bit with a shank (shaft) size that will fit into your router collet.

 

PRO-TECH router bits are manufactured in Taiwan.

 

consider safety for your health and the people around you

General safety suggestions:

It is advisable to always have the following items nearby and in a good condition

  • Eye protection clean and scratch free
  • Hearing protection quality earmuffs
  • Dust masks discard old and dirty masks
  • Gloves for easy handling of material and hand protection
Wear Gloves
Eye Protection
Hearing Protection
Dust Mask

To use router bits safely (and to get the best results from your router), the router bits need to be installed properly into the router's collet. Improper installation of your bits can cause excessive chatter and could increase the likelihood that the bits will break when in use. 

Clean and sharp

First of all, before beginning any routing operation, check your bits to make sure that they are clean, relatively free of pitch, and most of all, sharp. If the bit is dull, chipped, is excessively burned or has any other defect, it should be sharpened or replaced before use. 

Correct collet and collet nut fit

Most router collets have a recess (groove) that needs to click into a circlip that resides inside the collet nut. Failing to ensure that the collet 'clicked' into the collet nut will cause you to struggle to remove the router bit after tightening. This could cause the collet to break or be removed by a technical repair centre.

 

Correct fit inside the collet

When installing the bit into the collet, do not tighten the collet with the bit 'seated.' Instead, insert the bit until the shank (bit shaft) reaches the bottom of the collet, then ease it out about 2 mm before tightening the collet.

When the bit is tightened, there should be no less than  2/3 's of the length of the shank in the collet. If your bit has a shank that is too short, then the bit should be replaced. 

 

Safety gear

There are a few other safety measures to keep in mind whenever you use your router. First of all, remember to always wear appropriate safety gear as indicated above.

Correct speed setting

Second, be sure to set your router to the proper speed for your router bit. Setting your router to an incorrect speed will not only affect the router's performance, but also can cause the bit to break much more easily and even cause bodily harm. The speed at which a router bit turns can be important. The typical router runs at about 22,000 rpm, which is fine for most bits. But as the diameter of the bit increases, you ll want to slow things down.

Also, before beginning any routing operation, be certain that you give the router's motor time to come up to full speed for the chosen setting. Beginning to cut before the bit is at full speed can give less than desired results. 

Observe the following at all times

  • Wear a protective face shield or Safety Glasses to prevent eye and face injury.
  • Wear ear plugs or ear muffs to protect your hearing.
  • Use a respirator or dust mask to give protection from dust particles. Wood dust may remain in the air for hours after using power tools.
  • Always read and follow router operator's manual instructions.
  • Make sure that router rpm's and the bit selected match.
  • Dress properly. Wear short sleeves, no loose fitting clothes, proper footwear and no jewellery. Tie back long hair.
  • Always be sure the router is unplugged before replacing bits and that the switch is off before connecting the router.
  • Be sure the router bit has completing stopped spinning before sitting the router down.
  • Be sure bits, clamps and attachments are secure before starting up.
  • Keep children, pets and visitors at a safe distance.
  • Be especially cautious when working small pieces.
  • Keep hands and fingers away from revolving bits and cutters.
  • Do not operate routers in moist or wet areas.
  • Always grip tool tightly and be prepared at start-up to resist the motor torque.
  • When using a router table, make sure on/off switch is easily accessible.
  • Learn the sound of your router and shut it off at any unfamiliar sounds or irregularities.
    Never start the router with the bit in contact with the material.
  • Always feed in the proper direction, against the direction of bit rotation.
  • Maintain equipment. Replace worn parts, discard worn-out bits and check router periodically. Clean parts with appropriate solvents.
  • Don't operate a tool if you are tired or under the influence of medication, drugs, alcohol or while smoking.
  • Check wood for nails, screws or loose knots before routing.
  • Keep your mind on your work, avoid distractions, work at a comfortable pace and stop before you get tired.

Do a dry run

  • Place the router on the final work surface and test you cut by moving the router over the whole are to cut with THE ROUTER SWITCHED OFF
  • You do not want to waste an expensive piece of wood
  • You do not want to start all over
  • Never met anyone with spare fingers - SAFETY
Part No. Shank dia. Cutting width Cutting Height Radius
KP216021 1/4 inch 1/2 inch 1/2 inch used according
to width
6.35 mm 12.70 mm 12.70 mm

 

Length of Shank: 32 mm

 

 



KP216021Router Bits > Plunge Cutting Grooving Bits > Plunge Ball
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 58268772684

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4.3 ★★★★★
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Yahaira Gonzalez
Chelsea, US
★★★★★ 5
Favorite bones for my dog
Size: Small, Color: Pink
Dog favorite bones, but broken fast pink bone. I buy multiple times.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
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Jamie Long
Grantham, US
★★★★★ 5
Great for a teething puppy
Size: Small, Color: Pink
This is one of the best training collars we have used. So good that we ordered a second one so each dog has one and we have recommended it to several other people. It has 3 options, beeping, vibration and shock. Each option has several different settings. The collar comes in many different colors. It is very sturdy and it is waterproof. It is adjustable and the clip is very sturdy. I had previously bought a different training collar that did not phase my dog in the slightest and was a complete waste of money. It always seemed to be low on battery even after charging, this one however lasts like a week after charging. I will continue to use this brand for sure
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Reviewed in the United States on June 8, 2026
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Sage & Second Chances
Port Orchard, US
★★★★★ 5
The Toy Annie Always Comes Back To
Size: X-Small, Color: Pink
⭐⭐⭐⭐⭐ These have become one of Annie's all-time favorite toys. Annie is a tiny 4-pound dog, and she can be surprisingly picky about toys. She has a basket full of options, but she consistently comes back to her nubby Nylabones. I think the size and texture are a big part of why she likes them so much. They're easy for her to carry around, chew on, and play with by herself. Whenever I buy a new one, it quickly becomes part of her regular toy rotation. As a small-dog owner, I appreciate finding toys that are appropriately sized and actually get used instead of being ignored after a few days. If you have a tiny dog who loves to chew, these are definitely worth trying. They've been a favorite in our house for a long time.
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Reviewed in the United States on May 30, 2026
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Diana Scharnus
Port Orchard, US
★★★★★ 4
Dogs love these!
Size: Small, Color: Pink
My miniature Goldendoodle puppies love these! The only drawback is after several weeks of chewing, the bones develop pretty sharp edges long before the actual bone has been worn down. At that point, they are dangerous for the dog’s gums and must be thrown away.
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Reviewed in the United States on June 3, 2026
P
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princeton von d
West Palm Beach, US
★★★★★ 5
🦴 Micro Bone, Major Relief; Perfect Puppy Teething Chew Toy
Size: X-Small, Color: Blue, Size: X-Small, Color: Blue
🐾 Hi, I’m PVD; teething survivor, nub enthusiast, and gum massage advocate. This tiny blue bone was my day-one favorite from 8 weeks to 5.5 months, it handled every chew session, tantrum, and tooth eruption with dignity. I’ve officially “aged out,” but I still salute it. ⭐ Why it earned 5 stars: ✔️ Perfect XS size for toy breed jaws ✔️ Soft on sore gums, durable enough for dramatic chewing ✔️ Ridges + nubs = mouth spa treatment ✔️ Chilling it = elite teething relief ✔️ Kept me busy and prevented chewing on illegal things (furniture, shoes… mother) 🌀 Why I’m now gracefully retiring it (but still recommending): ✘ Jaw strength and confidence grew but I didn’t vibe with the larger size versions (tried and rejected them with judgment) ✘ Texture now too gentle for my post-teething chew style ✘ Advanced chewers may get bored once the rage-chewing era passes ✘ I get gum relief via Nylabone Nubz edible chews now Best For: • XS-Small breed puppies, especially under 5 lbs • Teething stages + gum relief • Delicate chewers or fur babies still in the love-bite phase • First-time puppy parents (trust me, this bone prevents household drama!) • 8 weeks–6 months old 🚫 Not for adult teeth or advanced chew techniques. 📝 Final Re-Barks: Iconic starter bone for toy breed pups. Affordable, safe, and genuinely soothing during teething chaos. It carried me through the hardest months (and saved several legs; both human and furniture). I’ve outgrown it; but I’ll forever endorse it for the next generation of tiny chewers. — PVD (Tiny Tooth Graduate, Former Chew Therapy Success Story 🧊🦴)
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Reviewed in the United States on September 17, 2025

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