230mm Hex Shank Long Auger Wood Drill Bits Joiner Carpenter Fast Cut

   230mm Long Auger Wood Drill Bits Joiner Carpenter Fast Cut 6mm To 35mm Hex Shank Softwood Hardwood Self-feeding Compare With Forstner Bit
Auger bits have a number of advantages over Forstner bits in cutting the round mortises, as one can cut slowly, or even use hand braces and the center threaded spur can be carefully controlled for accurate results especially when starting the hole. 20 times re-Sharpenable
The bit can be re-sharpened up to 20 times for a long useful service life. Large Spiral Groove
The large spiral groove offers optimal chip clearing and low friction, and minimizes the chance of clogging or jamming in the hole. Heat Treatment JIS G4051
These bits are made of carbon steel with a hardness of 55HRC, made according to Japanese industry standard JIS G4051. The heat treatment is made through induction hardening as commonly used for drill bits made in Japan. With this hardening process the inside of the drill remains soft and thus the bit is more difficult to break. With these bits you buy Japanese industrial quality at a very low price. Application:
These auger bits are designed for use with all kinds of softwoods and European hardwoods like beech and oak. They do not work well with the various kinds of very hard tropical woods. Package: Set A 6Pcs 6-16mm = 6 8 10 12 14 16mm Set B 8Pcs 6-25mm =6 8 10 14 16 18 22 25mm Set c 14Pcs 6-35mm =6 8 10 12 14 16 18 20 22 25 28 30 32 35mm Specification：
Material: Hardened Carbon Steel
Hardness: 55HRC
Heat Treatment: JIS G4051
Overall Length:230mm
Shank Type: Hex
Size Chart: Drill Diameter (D) Overall Length (L1) Flute Length(L2) Shank Size (Hex) mm mm mm mm 6 230 14 6 8 230 14 7 10 230 14 8.5 12 230 13.5 10.5 14 230 13.5 10.5 16 230 13.5 10.5 18 230 13 10.5 20 230 13 10.5 22 230 13 10.5 25 230 13 10.5 28 230 12.5 10.5 30 230 12.5 10.5 32 230 12.5 10.5 35 230 12.5 10.5 How fast can I run my power drill with these bits?
Speed depends on the material of the workpiece and the diameter of the bit. If you are not sure, prefer the lower speed. In hardwood the speed should be generally slower than in softwood. Bits less than 10 mm you can run more than 1000 rpm, up to 20 mm reduce to 800 rpm and bits more than 20 mm should not be runned more than 400 rpm. Find the best speed by yourself! You can increase the speed of the bits once you have more experience and feel about the material. Note:
1.This is especially important when using an electric drill. The bits should often be pulled back in (not out of) with the drill running to “air” the bit. This aids in clearing chips, which can tend to clog up in the bit and cause overheating, and allows the bit to cool off in use.
2.Use either a correctly-sized hand brace or a an electric drill.
3.When using an electric drill, one must be careful not to overheat the bit and to frequently "air" the bit and free the threads of any shavings by turning the machine in reverse and pulling it out of the work piece.
3.Pulling the bit out with the center screw still holding in the wood can damage or break the point! Use only light pressure with these bits! Do not use a drill press!
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