Gear Cutting Tools

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Basic hob profiles to DIN 58412 Symbols: h fP0 = dedendum of the basic profile h Pw = distance beween the tooth root and the end of the straight flank of the basic profile h P0 = profile height of the basic profile h P = profile height of the gear = cutting depth s P0 = π · m = tooth thickness 2 ö aP0 = tip radius ö fP0 = root fillet radius U 1 } For gears with basic N 1 cutter profile V 1 to DIN 58400 U 2 } For gears with basic N 2 cutter profile V 2 to DIN 867 DIN 58412 – basic profile U I – topping – 20° pressure angle h fP0 = 1,1 · m h Pw = 2,2 · m h Pw = 2,2 · m h P =h P0 = 2,6 · m from module 0,1 ÷ 0,6 h P =h P0 = 2,45 · m over module 0,6 ÷ 1 ö aP0 ≈ 0,2 · m ö fP0 ≈ 0,2 · m max. size for finishing Fig. 3.00 DIN 58412 – basic profile N 1 – non-topping – 20° pressure angle h fP0 = 1,3 · m h Pw = 2,4 · m h P = 2,6 · m from module 0,1 ÷ 0,6 h P = 2,45 · m over module 0,6 ÷ 1 h P0 = 2,8 · m from module 0,1 ÷ 0,6 h P0 = 2,65 · m over module 0,6 ÷ 1 ö aP0 ≈ 0,2 · m ö fP0 ≈ 0,2 · m max. size for finishing Fig. 3.01 DIN 58412 – basic profile U 2 – topping – 20° pressure angle h fP0 = 1 · m h Pw =2 ·m h P =h P0 = 2,25 · m ö aP0 = 0,2 · m ö fP0 = 0,2 · m max. size for finishing Fig. 3.02 ö aP0 15° s P0 hPw h P0 h fP0 ö fP0 20° ö aP0 15° s P0 h P hPw h P0 h fP0 ö fP0 20° s P0 ö aP0 15° hPw h P0 ö fP0 20° h fP0 DIN 58412 – basic profile N 2 – non-topping – 20° pressure angle h fP0 = 1,2 · m h Pw = 2,2 · m h P = 2,25 · m h P0 = 2,45 · m ö aP0 = 0,2 · m ö fP0 = 0,2 · m max. size for finishing Fig. 3.03 ö aP0 15° s P0 hPw h P0 h fP0 ö fP0 20° DIN 58412 – basic profile V 1 – non-topping – 20° pressure angle h fP0 = 1,3 · m h P = 2,6 · m from module 0,3 ÷ 0,6 h P = 2,45 · m over module 0,6 ÷ 1 h P0 = 2,8 · m from module 0,3 ÷ 0,6 h P0 = 2,65 · m over module 0,6 ÷ 1 s P0 = π · m – 2q 2 cos α ö aP0 = 0,1 · m ö fP0 = 0,2 · m max. size q = 0,05 · m + 0,03 for pre-machining Fig. 3.04 h P h P ö fP0 20° ö aP0 s P0 q h fP0 h P0 DIN 58412 – basic profile V 2 – non-topping – 20° pressure angle h fP0 = 1,2 · m h P = 2,25 · m h P0 = 2,45 · m s P0 = π · m – 2q 2 cos α ö aP0 = 0,1 · m ö fP0 = 0,2 · m max. size q = 0,05 · m + 0,03 for pre-machining h P ö aP0 ö fP0 20° s P0 q h fP0 h P0 Fig. 3.05 142
ö fP0 14° 30' Basic hob profiles for diametral pitch teeth Symbols: h fP0 = addendum of the basic profile h P = profile height of the gear = cutting depth h P0 = profile height of the basic profile s P0 = tooth thickness h CP0 = height of the correction For teeth to BS 2062, Part 1, 1959, for DP 1 ÷ DP 20 20° pressure angle h aP0 = 1,25 25,4 DP h P = 2,25 25,4 DP h P0 = 2,45 25,4 DP s P0 = 1,5708 25,4 DP h CP0 = 0,63 25,4 DP h P ö aP0 s P0 R CP0 h aP0 h P0 C P0 = width of the correction R CP0 = radius of the correction ö aP0 = tip radius ö fP0 = root fillet radius C P0 = 0,019 25,4 DP R CP0 = 12,9 25,4 DP ö aP0 = 0,39 25,4 DP ö fP0 = 0,2 25,4 DP h CP0 20° ö fP0 C P0 Fig. 4.00 For teeth to AGMA 201.02 - 1968 for DP 1 ÷ DP 19.99 14°30' pressure angle h aP0 = 1,157 25,4 DP ö aP0 s P0 h P = 2,157 25,4 DP h P0 = 2,357 25,4 DP s P0 = 1,5708 25,4 DP ö aP0 = 0,209 25,4 DP ö fP0 = 0,2 25,4 DP h aP0 h P0 Fig. 4.01 For teeth to AGMA 201.02 - 1968 for DP 1 ÷ DP 19.99 20° pressure angle h P ö fP0 20° ö aP0 s P0 h aP0 = 1,25 25,4 DP h P = 2,25 25,4 DP h P0 = 2,45 25,4 DP s P0 = 1,5708 25,4 DP h aP0 h P0 ö aP0 = 0,3 25,4 DP ö fP0 = 0,2 25,4 DP h P ö fP0 20° Fig. 4.02 For teeth to AGMA 201.02 - 1968 for DP 1 ÷ DP 19.99 20° pressure angle stub-tooth h aP0 = 1 25,4 DP ö aP0 s P0 h P = 1,8 25,4 DP h aP0 h P0 = 2 25,4 DP h P h P0 s P0 = 1,5708 25,4 DP ö aP0 = ö fP0 = 0,2 25,4 DP Fig. 4.03 143
Page 1:
Gear Cutting Tools • Hobbing •
Page 4 and 5:
Important information Product range
Page 6 and 7:
FETTE - a brief introduction Ecolog
Page 9 and 10:
Hobs for spur gears, straight- or h
Page 11 and 12:
Notes to the descriptions and size
Page 13 and 14:
Solid-type hobs for spur and helica
Page 15 and 16:
Solid-type hobs for spur and helica
Page 17 and 18:
Hobs For economical production on m
Page 19 and 20:
Multiple-gash hobs 19
Page 21 and 22:
In order to achieve a high tool lif
Page 23 and 24:
Gear quality The gear quality is de
Page 25 and 26:
Multiple-gash hobs Recommended stru
Page 27 and 28:
Carbide types and coatings The carb
Page 29 and 30:
High-speed cutting (HSC) The advant
Page 31 and 32:
Size table for solid carbide hobs R
Page 33 and 34:
These requirements are met perfectl
Page 35 and 36:
Heavy duty roughing hobs (roughing
Page 37 and 38:
The rough hobbing of gears form mod
Page 39 and 40:
Roughing hobs with indexable carbid
Page 41 and 42:
A special position among the above
Page 43 and 44:
Pitch- and tooth trace deviations a
Page 45 and 46:
Skiving hobs with brazed-on carbide
Page 47 and 48:
Solid-type hobs for straight spur g
Page 49 and 50:
Hobs for internal gears, with strai
Page 51:
Solid-type hobs for internal gears
Page 54 and 55:
Hobs for compressor rotors Rotors a
Page 56 and 57:
Rotor hobs, for finishing for screw
Page 59 and 60:
Hobs for sprockets, timing belt pul
Page 61 and 62:
Hobs for sprockets for Gall’s cha
Page 63 and 64:
Hobs for sprockets with involute fl
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Hobs for timing belt pulleys with i
Page 67 and 68:
Hobs for spline shafts quality grad
Page 69 and 70:
Hobs for p.t.o. shafts to DIN 9611
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Hobs for spline shafts with involut
Page 73:
73
Page 76 and 77:
Hobs for worm gears The specificati
Page 78 and 79:
Tangential method This method is su
Page 80 and 81:
Engagement area and bearing contact
Page 83 and 84:
Hobs for special profiles Hobs for
Page 85:
. Multi-start single-position fly-c
Page 88 and 89:
Worm thread milling cutters for mod
Page 90 and 91:
Worm milling cutters for roughing f
Page 92 and 93: Rack milling cutters/worm milling c
Page 94 and 95: High-precision rack tooth gang cutt
Page 97 and 98: Gear milling cutters for spur gears
Page 99 and 100: Involute gear cutters for spur gear
Page 101 and 102: FETTE has considerable experience i
Page 103 and 104: End mill type gear cutters (finishi
Page 105 and 106: Gear roughing cutters with indexabl
Page 107: Gear finishing cutter ■ With carb
Page 110 and 111: Profile milling cutters for coarse-
Page 112 and 113: Rotor profile cutters for screw com
Page 115 and 116: Gear milling cutters for sprockets,
Page 117 and 118: Form milling cutters for timing bel
Page 119 and 120: Cat.-No. 2730 relief turned or reli
Page 121 and 122: Gear chamfering cutters for chamfer
Page 123: 123
Page 126 and 127: Comparison: module pitch - diametra
Page 128 and 129: Tolerances for multiple start hobs
Page 130 and 131: Hob inspection records The toleranc
Page 132 and 133: The effect of cutter deviations and
Page 134 and 135: Effect of the quality grades of the
Page 136 and 137: Hob clamping Keyway Hob clamping Dr
Page 138 and 139: Basic profiles for spur gears with
Page 140 and 141: Basic hob profiles Defination of th
Page 144 and 145: Profiles of current tooth systems a
Page 146 and 147: Sprocket tooth system for roller- a
Page 148 and 149: Spline shaft tooth system; basic cu
Page 150 and 151: "Carbide" is a generic term for pow
Page 152 and 153: The enormous increases in tool life
Page 154 and 155: Total a - Initial edge wear b - mec
Page 156 and 157: Cutting materials for hobs (See als
Page 158 and 159: A further a table of recommended va
Page 160 and 161: Number of starts of the hob With th
Page 162 and 163: Tool cutting edge length A distinct
Page 164 and 165: Tool cutting edge length (continued
Page 166 and 167: Shift distance The chip cross-secti
Page 168 and 169: Maintenance of hobs Introduction In
Page 170 and 171: Requirements placed upon the cuttin
Page 172 and 173: If the high or low points of the tw
Page 174 and 175: Hobs with a slightly concave cuttin
Page 176 and 177: Gash lead (item no. 11 DIN 3968) Th
Page 178 and 179: When regrinding, ensure that the co
Page 180 and 181: form circle diameter is less than t
Page 182 and 183: Wear phenomena on the hob The cutti
Page 184 and 185: Ziegler (2) demonstrated that the c
Page 186 and 187: The effect of the cutting condition
Page 188 and 189: the penetration line is important p
Page 190 and 191: left-hand start machines a gear wit
Page 192 and 193:
Involute gear cutter with indexable
Page 194 and 195:
DIN number index DIN Page 138 30, 4
Page 196 and 197:
196
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