Drill bits are cutting tools used to remove material to create holes, almost always of circular cross-section. Drill bits come in many sizes and shapes and can create different kinds of holes in many different materials. In order to create holes drill bits are usually attached to a drill, which powers them to cut through the workpiece, typically by rotation. The drill will grasp the upper end of a bit called the shank in the chuck. Drill Bits,Drill Bit Set,Drill Bit Types,Diamond Drill Bit Shenyang Lubang Railway Maintenance Machinery Co.,Ltd. , https://www.srmfrailwayequip.com
DONGHUA Chain Group is the most professional manufacturer of power transmission in China, manufacturing roller chains, industry sprockets, motorcycle sprockets, casting sprockets, different type of couplings, pulleys, taper bushes, locking devices, gears, shafts, CNC precision parts and so on. We have passed ISO9001, ISO14001, TS16949 such quality and enviroment certification.
Special sprocket with special surface treatment called vacuum coating
Simplex sprocket with special hub
Carburizing, zinc plated
Product nameÂ
OEM Special Sprocket Chain Wheels
Materials Available
1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20 3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40) 4. Bronze: C51000, C52100, C54400, etc 5. Iron: 1213, 12L14,1215 6. Aluminum: Al6061, Al6063 7.OEM according to your request
Surface Treatment
Annealing, natural anodization, heat treatment,  polishing, nickel plating, chrome plating, znic plating,yellow passivation, gold passivation,  satin, Black surface painted etc.
Products Available
sprockt chains, pulley, shafts(axles, spline shafts, dart shafts),gears (pinions, wheels gear rack) bearing, bearing seat,  bushing, coupling, lock assembly etc.
Processing Method
CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly
QCÂ :
Technicians self-check in production,final-check before package by professional Quality inspector
Size
Drawings
Package
Wooden Case/Container and pallet, or as per customized specifications
Certificate
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009
Advantage
Quality first Service superior , Advanced equipment,Experienced workers,Perfect testing equipment
Lead Time
15-25days samples. 30-45days offcial order
Drill bits come in standard sizes, described in the drill bit sizes article. A comprehensive drill bit and tap size chart lists metric and imperial sized drill bits alongside the required screw tap sizes. There are also certain specialized drill bits that can create holes with a non-circular cross-section.