1、DC 621.934.023ml.14 : 674.053 DEUTSCHE NORMEN September 1975 Saw Blades for Woodworking Tech nical Condit ions of De I very for Circular Saw Blades of Tool Steel - DIN 5134 Part 4 Sgebltter fr Holz; Technische Lieferbedingungen fr Kreissgebltter aus Werkzeugstahl For connection with the Standard IS0
2、 2935-1974 published by the International Organization for Standardization, see Explanations. Dimensions in mm 1 scope This Standard applies to circular saw blades for wood- working, made of tool steel (solid steel circular saw blades), other than circular grooving saw blades and so- called hollow-g
3、round circular saw blades. 2 Dimensions The dimensions of circular saw blades are to be taken from the saw blade Standards valid in each case or other technical documents. Tolerances and surface finish of circurlar saw blades are contained in the following Table, cf. also the adjacent Figure. r I l
4、0,25 0.25 1) Measured 5 mm below the bottom of the gullet on the unloaded saw blade, turned slowly by hand in the machine. 2) In the condition before setting and sharpening; in the condition ready for cutting the true running deviations are Continued on page 2 3) Measured when mounted in clamping bu
5、sh or clamping flanges. Explanations on page 2 smaller, see also Section 4. Sole aale rlghtr of Qerman Siandorth (DIN-Normen) am with Beuth Verlag Omt+i. Bodin 30 04.81 DIN 5134 Teil 4 eng/. Preisgr. 4 Vem.-Nr. O104 Page 2 DIN 5134 Part 4 3 Material and hardness 3.1 Material Tool steel, unalloyed -
6、Group symbol WS -or alloyed - Group symbol SP (special steel) - according to the safety requirements of DIN 8085. Usual materials according to DIN 8085 Supplement. 3.2 Hardness Rockwell hardness 44 to 52 RHC. The differences in hardness must not exceed 5 RHC within the same cir- cular saw blade. The
7、 hardness of a circular saw blade is to be determined at at least 5 places. In the case of circular saw blades of more than 3.5 mm thickness and circular saw blades with a pitch of less than 8 mm, the hardness can be less than that indicated, so as to ensure that it is possible to set the blade. 4 F
8、inish Circular saw blades must be uniformly straightened, tensioned, preset and pre-sharpened. Circular saw blades for portable circular saws are supplied already set and sharpened. Unless otherwise agreed, circular saw blades which have to be set before use will be given a uniform setting (half- se
9、tting) of 0.4 to 0.7 mm on either side as a preliminary setting. N o t e : The prelininary setting is primarily a test of setting capacity. The final setting is carrie out by the actual user according to the requirements. Circular saw blades of 225 mm up to 710 mm outside diameter, surfaceground or
10、smooth-ground at the manu- facturers discretion. If the customer requires a particular finish, this should be indicated (“pl“ for surface-ground or “bk“ for smooth-ground). The designation for, say, a circular saw blade of outside diameter d, = 315 mm, thickness s = 1.6 mm, hole d2 = 30 mm, surface-
11、ground (pi) of unalloyed tool steel (WS) is then: Saw blade 31 5 x 1.6 x 30 pl DI N 8809 - WS 5 Safety requirements According to DIN 8085 6 Marking According to the safety requirements f DIN 8085 Further Standards DIN DIN DIN DIN 50 150 (Preliminary Standard) Hardness comparison table, Vickers hardn
12、ess, Brinell hardness, Rockwell hard- ness B and C and tensile strength DIN 50 103 Part 1 and Part 2 Rockwell hardness testing 8085 Machine tools for machining wood, plastics and similar materials; safety requirements 8085 Supplement Machine tools for machining wood, plastics and similar materials;
13、safety requirements, 8809 Circular saw blades for woodworking of tool steel Usual materials Explanations The permissible deviations in the outer diameter d, given in this Standard correspond to those in IS0 Standard 2935- 1974 published by the International Organization for Standardization (ISO): E:
14、 Circular saw blades for woodworking - Dimensions F: Lames des scies circulaires bois - Dimensions Obtainable from the DIN Deutsches Institut fr Normung e.V., Berlin (German Institute for Standardization, Berlin). In IS0 Standard 2935-1974 the tolerance zone for the central hole is optionally H9 or H11. In this Standard the tolerance of H8, which has long been used in practice, is retained.
