The SSG-R Ground Spur Gears are made from carbon steel, are induction hardened and the teeth are ground finished. These pinions are designed to mate with Nabtesco Gearheads.
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Ground-Spur-Gears SSG-R

KHK SSG1.5-50R24, Module 1.5, 50 Tooth, Ground Carbon Steel Speed Reducer Pinions
Ground-Spur-Gears SSG-R

KHK SSG2-40R24, Module 2, 40 Tooth, Ground Carbon Steel Speed Reducer Pinions
Ground-Spur-Gears SSG-R

KHK SSG2.5-27R24, Module 2.5, 27 Tooth, Ground Carbon Steel Speed Reducer Pinions
Ground-Spur-Gears SSG-R

KHK SSG2.5-28R24, Module 2.5, 28 Tooth, Ground Carbon Steel Speed Reducer Pinions
Ground-Spur-Gears SSG-R

KHK SSG2.5-29R24, Module 2.5, 29 Tooth, Ground Carbon Steel Speed Reducer Pinions
Gear Type N/A Spur Gears
Construction N/A Ground Carbon Steel Spur Gears-R-series
Bore Type N/A Ground
Module N/A 1.5 N/A 2 N/A 2.5 N/A 2.5 N/A 2.5
No. of Teeth N/A 50 N/A 40 N/A 27 N/A 28 N/A 29
Shape N/A S1Z N/A S1Z N/A S1U N/A S1Z N/A S1Z
Bore Diameter (A) N/A 0.709 in18 mm N/A 0.787 in20 mm N/A 0.787 in20 mm N/A 0.787 in20 mm N/A 0.787 in20 mm
Hub Diameter (B) N/A 2.362 in60 mm N/A 2.362 in60 mm N/A 2.205 in56 mm N/A 2.362 in60 mm N/A 2.362 in60 mm
Pitch Diameter (C) N/A 2.953 in75 mm N/A 3.150 in80 mm N/A 2.657 in67.5 mm N/A 2.756 in70 mm N/A 2.854 in72.5 mm
Outer Diameter (D) N/A 3.071 in78 mm N/A 3.307 in84 mm N/A 2.854 in72.5 mm N/A 2.953 in75 mm N/A 3.051 in77.5 mm
Face Width (E) N/A 0.591 in15 mm N/A 0.787 in20 mm N/A 0.984 in25 mm N/A 0.984 in25 mm N/A 0.984 in25 mm
Hub Width (F) N/A 0.551 in14 mm N/A 0.630 in16 mm N/A 0.709 in18 mm N/A 0.709 in18 mm N/A 0.709 in18 mm
Total Length (G) N/A 1.142 in29 mm N/A 1.417 in36 mm N/A 1.693 in43 mm N/A 1.693 in43 mm N/A 1.693 in43 mm
Included Screws N/A M6x20 N/A M6x25 N/A M6x45 N/A M6x25 N/A M6x25
Counterbore Diameter N/A 0.433 in11 mm N/A 0.433 in11 mm N/A N/A 0.433 in11 mm N/A 0.433 in11 mm
Counterbore Depth N/A 0.354 in9 mm N/A 0.551 in14 mm N/A N/A 0.748 in19 mm N/A 0.748 in19 mm
Mounting Hub Diameter (H) N/A 0.945 in24 mm
Mounting Hub Width (I) N/A 0.157 in4 mm
Drilled Hole Diameter (J) N/A 0.260 in6.6 mm
Quantity N/A 6
Pitch Diameter of Screws N/A 1.772 in45 mm
Bending Strength N/A 54.7 N·m5.58 kgf·m N/A 98.3 N·m10 kgf·m N/A 115 N·m11.7 kgf·m N/A 120 N·m12.3 kgf·m N/A 126 N·m12.9 kgf·m
Surface Durability N/A 47.2 N·m4.8 kgf·m N/A 72.1 N·m7.35 kgf·m N/A 63.5 N·m6.44 kgf·m N/A 68.2 N·m6.95 kgf·m N/A 73.3 N·m7.48 kgf·m
Backlash N/A 0.0039-0.0071 in0.10-0.18 mm N/A 0.0047-0.0087 in0.12-0.22 mm N/A 0.0047-0.0087 in0.12-0.22 mm N/A 0.0047-0.0087 in0.12-0.22 mm N/A 0.0047-0.0087 in0.12-0.22 mm
Precision Grade N/A JIS grade N7 (JIS B1702-1:1998)
Gear Teeth Type N/A Standard Full Depth
Pressure Angle N/A 20 º
Material N/A S45C
Heat Treatment N/A Gear teeth induction hardened
Tooth Hardness N/A HRC 50-60
Surface Treatment N/A Black oxide coated except for teeth and portions given secondary operation
Weight N/A 0.63 kg1.389 lb N/A 0.89 kg1.962 lb N/A 0.82 kg1.808 lb N/A 0.86 kg1.896 lb N/A 0.91 kg2.006 lb