480 Каталог GEDORE 2014 Профессиональный слесарный инструмент и оборудование Стр.478

Каталог GEDORE 2014 Слесарный инструмент Стр. 478 0480 ENG Lab2u

GEDORE Manufacturing process for hammers Hammer head (1) C45 hardened and tempered steel precisely cropped to length. (2) Hot pre-forged in a double forging die. (3) Fully forged blank. (4) De-burring of the blanks. (5) Production of the hammer eye. (6) After descaling the blank it is machined all round in accordance with DIN 1193. The pein and face of the hammer head are additionally ground. (8) The hammer head is sand blasted to descale and degrease it. (9) Corrosion protection by stove enamelling. (7) The hammer head is induction hardened to 50-58 HRC and then annealed. Care has to be taken to ensure that within a defined measured area the hardness deviation is no greater than 5 HRC. The hardening depth on the face and pein must be at least 3 mm. The hardness of the eye zones however must not exceed 30 HRC. The hammer head now has hard striking faces and a soft shock absorber zone. These safety-relevant values are subject to continuous monitoring. The hammer head is permanently stamped with the manufacturer's mark weight and DIN 1041. (10) The hammer face and pein are ground bright in accordance with DIN 1041. Attention is paid here particularly to regular clean edges and to a slight convex geometry of the face. Hammer handle (1) Shaft blank from hickory. This tough wood has long fibres making it ideal for hammer shafts. The long fibres cushion the impact in the hand. The tight annealed rings give the wood its flexural strength. (2) The square shaft blank is cut to size. (5) Coating with water-soluble clear varnish. (6) The hand end is set off in mahogany staining. (3) The hammer shaft is milled. (4) The look is improved by sanding. 478 (7) The shaft protection sleeve is pressed on and the shaft tampon printed.