This router bit is used for creating a concave shaped profile on the side of the workpiece in one pass
This router bit has a 6,35 mm shank (shaft) that will fit most small or large 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
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Wear Gloves
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Eye Protection
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Hearing Protection
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Dust Mask
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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.
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.
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.
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.
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.
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.
Although most router bits are small, they can be potentially dangerous and should deserve your attention and respect.
1 Use push sticks or a push block to position your hands a safe distance from the router bit.
2 Use large-diameter bits only in a router table. Using bits over 25mm Ø (diameter) in a handheld router can possibly cause you to lose control of the tool and harm yourself or bystanders.
3 Always wear a dust mask as well as eye and hearing protection.
4 Take light cuts. Heavy cuts invite kickback. If necessary, move the fence closer to the bit or switch to a larger guide bearing/bush.
5 Use a featherboard (anti-kickback device) to support the workpiece against the router table and/or fence.
6 Never climb-cut. Always feed the stock from right to left. Against the rotation of the router bit. (see illustration)
7 Avoid routing small stock. Instead, rout a larger piece and cut it to size afterwards. If you absolutely have to profile a small piece, build an suitable jig or secure the workpiece.
8 Always use a guard. If the fence didn’t come with a guard, make your own.
9 Never start the router with the bit in contact with the material.
10 Don’t force the router bit or overload the router. Excessive heat is an enemy.
11 Secure/fasten the router in the base before starting/switch on the router.
12 Don’t bottom out the bit in the collet or partially insert the bit. Instead, completely insert the bit, and then back off approximately 2 mm. At least 2/3 's of the router bit shank should be inside the collet.
13 Be sober and not under the influence of medicine that causes a lack of concentration
14 Tidy up your workshop to ensure the ability to move freely with enough room around the router table
Fortunately, this is pretty easy. The best way to prolong the life of a router bit is to keep it clean. And what you need to do varies with the type of bit.
Note: Sharpening is extremely important too.
To clean bits without bearings, first blow off any dust. Then remove any resin that has built up. (Resin places a drag on the bit which can cause it to overheat and burn.)
Resin removers are available. It's the same stuff you use to clean your saw blades.
To clean bits with bearings, first, remove the bearing. Then clean the bit as you did with non-bearing bits.
It's important to remove the bearings because even though router bearings are 'sealed,' resin remover can sneak in and dissolve the bearing grease. If this were to happen, you would be faced with the problem of trying to lubricate a sealed bearing.
Despite the claims of bearing grease sellers, we've never had much luck with this. Once that grease is gone, just go buy a new bearing.
Periodically inspect the shanks of your router bits for rust or burrs. Either of these can be removed quickly with ScotchBrite®. Left on, they can interfere with your ability to properly tighten the bit in the collet.
If you've got a router with variable speed, then you've got the power to improve the quality of your cut. In general, the larger the bit, the slower the speed you need. The perfect solution for dealing with varying bit sizes is a variable speed router.
Here are general guidelines for most bits:
Bit size | Bit size | rpm |
Small – 12.7 mm | 1/16' to 1/2' | 22,000+ |
12,7 mm – 28,6 mm | 1/2 to 1 1/8' | 14,000 - 18,000 |
28.6 mm – 50,8 mm | 1 1/8' to 2' | 12,000 - 14,000 |
Bit size | Bit size | rpm |
50,8 mm – 63,5 mm | 2' to 2 1/2' | 12,000 - 14,000 |
63,5 mm & larger | 2 1/2' and up | 8,000 - 12,000 |
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