288 TECHNICAL INFORMATION 2Shaft Material, Hardness, Surface Treatment 2Notes on Hardening and Surface Treating & S(SC, etc.) =1mm Increment & S (SC, etc.) +-1≤L S(SC etc.) =0 or S(SC etc.) ≥1 & Cannot be machined coplanar. & Orientation in relation to other features will be random. (Ex.) Approx.10 Approx.10 Approx.10 Approx.10 D S(SC, etc.) W -1 D & Cross-drilled hole areas may be out of O.D. tolerances due to annealing-induced deformation. & Hard chrome plating layers around machined area may be flaked by deburring. ( Areas) &Orientation in relation to other features will be random. d D 2 &GGFDUJWF )BSEFOFE -BZFS %FQUI PG 4IBGUT IBSEFOFE XJUI 0 % 5PMFSBODF H I O.D. (D) &GGFDUJWF )BSEFOFE %FQUI &/ &RVJW &/ &RVJW 3 0.5 or More 0.5 or More 4 5 6~10 12, 13 0.7 or More 0.5 or More 15~20 0.7 or More 25~50 1.0 or More .Material O.D. Tolerance )Hardness 4Surface Treatment EN 1.3505 Equiv. g6, h5 Induction Hardening EN 1.3505 Equiv. 58HRC~ EN 1.4125 Equiv. 56HRC~ - EN 1.4125 Equiv. EN 1.3505 Equiv. Hard Chrome Plating Plating Hardness HV750 ~ Plating Thickness: 5μ or More EN 1.4125 Equiv. EN 1.3505 Equiv. g6 Low Temp. Black Chrome Plating Plating Thickness: 1 ~ 2μ EN 1.4125 Equiv. EN 1.1191 Equiv. f8 - Hard Chrome Plating Plating Hardness HV750 ~ Plating Thickness 10μ or More EN 1.4301 2Reduced Hardness around Machined Areas 2Surface Treatment Plating Layers Machining is applied after base materials are case hardened. In the example below, annealing caused by machining may result in reduced hardness of the machined area + 10mm fore and aft. Machining is applied after base materials are surface treated. In the example below, only D area is treated with hard chrome plating/low temp. black chrome plating. Hard chrome plating, low temp. black chrome plating will not remain on cut-ends, stepped. tapered, and altered sections. &For Features of Low Temp. Black Chrome Plating, see 8 P.292. & Hollow shaft interior surfaces are not plated, which causes rust. Other plating finished shapes are: t Threaded, Stepped and Tapped t Retaining ring grooves, keyway, tapers, hex socket holes, wrench flats, set screw grooves t Keyway, Flats, 90-deg. Flats, V-grooves &Surface Treatment Fully Plated Shafts will have the plating on the entire shaft except centering holes and tapped sections. Annealing caused by machining may lower hardness of following areas: t All threaded shafts t All stepped shafts t Tapped Holes: when M≥D/2, RC threads, two tapped holes on ends, hard chrome plated SUS440C products t Retaining ring grooves, keyway, tapers, hex socket holes, wrench flats, tapped pilot, set screw grooves t Keyway, Flats, 90-deg. Flats, V-grooves t Shaft Ends Configurable Type (G, H shape), Hollow Shafts (Lateral Hole on One Side) (Note) Excluding "Full Length Hardness Guaranteed Type" Approx. 10 Approx. 20 ~ 30 Approx. 20 ~ 30 t 'PS 4IBGUT XJUI $SPTT %SJMMFE )PMF BOOFBMJOH NBZ lower hardness in the range of 20mm and 30mm around machined area for SUJ2 and SUS440C respectively. 2Cross-Drilled Hole Dimension Details 24IBGUT %FUBJMFE 8SFODI 'MBUT %JNFOTJPOT One End Tapped Shafts with Cross-Drilled Hole Hex Wrench Welding Structure (Chamber) One End Tapped Shafts with Cross-Drilled Hole t 4IBGUT XJUI $SPTT %SJMMFE )PMF BSF TVJUBCMF GPS OBSSPX XPSL TQBDF Unit: mm 9Not applicable to D=3, 4, 5 D 8 -1 6 5 8 8 7 10 8 12 10 10 13 11 15 13 16 14 D 8 -1 18 16 10 20 17 25 22 30 27 15 35 30 40 36 20 50 41 D d 8 3 10 12 13 4 15 16 D d 18 6 20 25 7 30
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