B3-FH-8-D onwards For details on the shafts see Chapter Bevel-helical gear units B3

Flender/Flender Gear Units/Bevel-helical gear units B3

s, but removal rates are limited. Aluminium oxides are well suited for grinding unhardened materials. Applications: universal machining of unhardened and hardened steels grinding speed: 1 / depth infeed: 0.0.1 mm dressing speed: 2 mm/min dressing removal: 0.1.2 mm Sintered Corundum This is Al 2O3generated from aluminium hydroxide. After drying and crushing, it is sintered in number of operations. Sintered corundum has an extremely small crystallite of 0.0.0 mm, leading to self-sharpening effect. Crystallite fragments of varying sizes splinter off during grinding, exposing underlying sharp grit cutting edges. Sintered corundum consequently attains sig- nicantly longer tool lives. Surface roughness can be improved systematically if the dressing removal amount is lowered or the speed is reduced. Sintered corundum Fig. 6.2 Flared cup grinding wheel2 6 Manufacturing Process wheels are frequently supplied with an open-pored bond, allowing more cooling lubricant to come into contact and increasing grinding performance. Applications: high power grinding of hardened steels grinding speed: 1 /sdepth infeed: 0.1.5 mmdressing speed: 1 mm/mindressing removal: 0.0.1 mm Silicon Carbide Silicon carbide has higher hardness and lower toughness when compared to aluminium oxides. Pale green silicon carbide, with extremely goodcutting ability, and dark silicon carbide which is extremely hard and less brittle, can both be applied. Silicon carbide has high thermal conductivity and is therefore used especially for grinding heat-sensitive materials. Applications: high-alloyed and tough materials, titanium alloys cutting speed: 1 / depth infeed: 0.1.5 mm dressing speed: 2 mm/mindressing removal: 0.0.1 mm CBN Cubic boron nitride (CBN) came to the market as an abrasive in 1. CBN is synthesized and is supplied in monocrystalline and microcrystalline forms.Advantages include its great intrinsic hardness of 4,7 /mm 2according to Knoop (by comparison, diamond hardness is 7,0 /mm and the long r