Guangdong lengthened adjustable sets extended superhard diamond drill sleeve drill bushing sleeve wholesale introduction

Guangdong lengthened adjustable sets extended superhard diamond drill sleeve drill bushing sleeve wholesale introduction Guangdong lengthened adjustable sets extended superhard diamond drill bushing sleeve wholesale diamond drill bushing sleeve introduce DEFINITIONS guide sleeve drill the borehole. [Role] 1, the guide for the drill. 2, to ensure accuracy. 3, to improve productivity, 4, lower labor demands. [Category] 1. Fixed bit holder, 2 interchangeable drill sets. [Material] The most commonly used materials: GCR15, requires wear resistance, high hardness, hardness is generally HRC62 [production process] car, (mill gap) hardened, ground. The most difficult is the mill hole, since the hole is small, requires special equipment, general mill speed of 40,000 holes rev / min with drill bit holder set tolerance housing bore drill holes (also known as pilot holes) Basic size diameter should be used The maximum limit size of the tool, and the use of basic shaft system clearance fit. When drilling or reaming tolerances take F7 or F8, when crude hinges take G7, when fine hinge take G6. If the drill guide sleeve guide column is part of the tool, you can press the corresponding mating hole basis of selection, such as H7 / f7, H7 / g6 or H6 / g5 and so on. H drill guide sleeve length length H orientation and action-oriented tool for large, H is large, the tool bit holder is not easy to deflect, but will accelerate the wear of the tool and the bit holder; H is too small, then drilling the guide is not good. The length of the guide is usually taken to its aperture ratio of H: H / d = 1 ~ 2.5. When high machining accuracy or machining smaller aperture, due less rigid drill bit used, the H / d value can be larger, such as hole diameter d