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Speedmade is one of the most professional dth hammer bits manufacturers and suppliers in china. if you're going to buy customized dth hammer bits made in china, welcome to get quotation from our factory. for more information, contact us now.

Use one hand to hold the drill bit in place. tighten the jaws of the drills chuck by turning the metal chuck key with your other hand in a clockwise manner. tighten the chuck jaws as firmly as possible. remove the chuck key, and take your hand off the bit. test the drill to see if it is drilling properly.

Aug 14, 2020 · since its beginning in 1985, numa has become a major manufacturer of dth hammers and bits for the domestic and international drilling industry. the company designs and builds downhole hammers and bits for drilling vertical and horizontal holes 3½ to 50½ inches (89 to 1,283 millimeters) in diameter. to learn more, visit www.numahammers.

9/16 to 1-1/4", 118° point, oxide finish, high speed steel reduced shank drill bit set 10 piece, standard point, 6" oal, 1/2" shank diam msc# 02387587 hertel in stock

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