SKU: 36942092685

PRO-TECH CORE BOX BIT 1/2' X 1/4'SH KP803

Sale price$170.43 Regular price$189.37
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Description

PRO-TECH CORE BOX BIT 1/2' X 1/4'SH KP803Core box router bit Carbide Tipped Pro Tech offer eight sizes core box router bits. These bits can be used in hard woods, soft woods, plastics and other composite materials. Our range of bits can be used with hand held, table mounted and CNC routers. Application is where a round bottom groove is desired. Using an edge guide, a core box router bit can cut coves. Other uses include: Reeding Fluiting Veining Grooving General ornamentation This router bit

Core box router bit

Carbide Tipped

Pro-Tech offer eight sizes core box router bits. These bits can be used in hard woods, soft woods, plastics and other composite materials. Our range of bits can be used with hand-held, table-mounted and CNC routers. Application is where a round bottom groove is desired. Using an edge guide, a core box router bit can cut coves.

Other uses include:

  • Reeding
  • Fluiting
  • Veining
  • Grooving
  • General ornamentation

 

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
KP803 1/4 inch 1/2 inch 3/8 inch 1/4 inch
6.35 mm 12.70 mm 9.52 mm 6.35 mm

 

Length of Shank: 32 mm

 

 



KP803Router Bits > Plunge Cutting Grooving Bits > Core Box
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: 36942092685

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4.6 ★★★★★
Based on 29 reviews
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Verified Purchase
BillyD
Whiting, US
★★★★★ 5
Very durable and amazingly fun
Pattern Name: Assorted, Size: Pack of 2
My dog loves frisbees, but now this is the only one I’ll ever buy again! If you’ve ever had a dog frisbees you know that some dogs can eat/chew-up a frisbee in literally minutes. Not this one, no way! I’ve bought several of these because I keep one in my truck, one on my boat, one for the backyard, and one just for the dog-park (can you say “community drool”? I take these everywhere (see videos) and every single dog that gets ahold of it loves it. As a matter of fact the only problem I’ve ever had with it is when I take my dog to the dog park all the other dogs fight over this frisbee. As far as quality it’s tough as nails, sure if my dog sat and gnawed on it for hours he might eventually tear it up but it would take a very long time and I would see him chewing it up. My dog and all the other dogs at the dog park will gnaw and chew on it and not one dog (from labs to retrievers to pitbulls to Rottweilers to even a malinois, a German Shepard and a massive cane corso to a little cur of a dog) not one has torn it up, and they ALL play tug of war with it. It’s great for teaching young and old dogs how to catch because it is soft enough not to bounce out of their mouth and they can catch it with a good grip. The best thing ever: it’s malleable and can be easily put back into a round shape even after heavy pulling. It floats on the water perfectly and will not sink no matter how wet with water (or drool!). On top of that it’s very light yet is easy to throw in even heavy wind, and as a frisbee guy for decades when I say it throws good, it’s pretty darn accurate whether wet or dry. Personally I have found I like the pink one the best (not the pink swirly one, even though it’s fine I like the black edging on the others as they seem tougher and more solid for throwing). The solid pink ones are easier to see in water, grass, dirt, etc. I have bought 5 of these so far, not because they get trashed or fall apart, but like I said it’s because I have one for every purpose. Highly recommend the solid pink as best color wise.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 30, 2025
M
Verified Purchase
Michael A Shaffer
Charlottesville, US
★★★★★ 4
Great frisbee for our golden doodle
Pattern Name: Assorted, Size: 9" Pack of 5
Love the product. Our golden doodle can chase these all day long. They are light enough and easy on him to catch them and they fly well. Only complaint is I wish they were a little cheaper. He does go through them
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2026
E
Verified Purchase
E. Johnson
Charlottesville, US
★★★★★ 5
Amazing frisbees for dogs!
Pattern Name: Assorted, Size: Pack of 2
These are the best frisbees for dogs. They hold up well but do fade over time if left in the sun. Our border collie mix is an avid frisbee guy and these are his favorite. The float in water well and last for quite a while. He’s not a chewer so I can’t speak to the durability with chewing. I buy a couple every year when his old ones get faded and gross, otherwise we would continue to use these for over a year!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
F
Verified Purchase
Fawn
Chelsea, US
★★★★★ 5
Our dogs adore these!
Pattern Name: Assorted, Size: 9" Pack of 5
We have two large-breed dogs who love retrieving in the water and playing catch in the yard, and these flying discs have been fantastic. They are the perfect size, easy to throw due to their lightweight design, and the vibrant colors make them simple to locate. While they hold up well during play, they are best suited for fetching rather than tug-of-war, as the material can be delicate if pulled too hard. Overall, both we and our dogs absolutely love them!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
H
Verified Purchase
Houston Littlejohn
Lake Worth, US
★★★★★ 3
Fun toy, breaks with rough play
Pattern Name: Assorted, Size: Pack of 2
It's a fun toy and my dog loved it, however he is quite rough so the toy broke at the point where the little plastic loop in the frisbee connects. Good for dogs who are a little more gentle.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026

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