Solid Edge Engineering Reference
Design And Calculation Report

Spur Gear

GENERAL INFORMATION
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Date Created: 2010/11/26 10:42:13 PM
Generated by: Dan
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STRENGTH VALIDATION: Fail

Standard: ISO

INPUT DESIGN CONDITIONS
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DESIGN INPUT PARAMETERS

GEAR PARAMETERS
Desired Gear Ratio: 1 
(al) Pressure Angle: 20.00 ° 
(bt) Helix Angle: 0.00 ° 
Module: 1.00 mm 
Helix Angle Direction: Left 
(r) Root Fillet: 0.20 mm 
Gear Accuracy: 1 
Application Factor: 1.2 
Pinion Mounting Constant: 0.8 
Roughness Factor: 1 

CALCULATION PARAMETERS
Efficiency: 0.92 

Pinion:  
No. of Teeth: 26 
(DM) Mounting Hole Diameter: 6.00 mm 
(b) Face Width: 10.00 mm 
Power: 1000.00 W 
Speed: 6000.000 deg/s 
Size Factor For Contact: 1 
Size Factor For Bending: 1 

Gear:  
No. of Teeth: 26 
(DM) Mounting Hole Diameter: 6.00 mm 
(b) Face Width: 10.00 mm 
Size Factor For Contact: 1 
Size Factor For Bending: 1 

PINION MOUNTING CONSTANT

Pinion:  
Pitch of Bearing: 80.00 mm 
Move from Shaft Center: 8.00 mm 
Medium Shaft Diameter: 25.00 mm 

Gear:  
Pitch of Bearing: 80.00 mm 
Move from Shaft Center: 8.00 mm 
Medium Shaft Diameter: 25.00 mm 

MATERIAL PROPERTIES USED FOR CALCULATIONS
Pinion Material: User 
Contact Stress [ MPa ]: 1140 
Bending Stress [ MPa ]: 605 
Gear Material: User 
Contact Stress [ MPa ]: 1140 
Bending Stress [ MPa ]: 390 

MATERIAL PROPERTIES APPLIED TO THE MODEL

DESIGN INPUT OPTIONS
Type of Gearing: External Gearing 
Output Geometrical Parameters: Find Center Distance 
Strength Calculation Method: Based on Bending and Contact Stress 
Correction Method: Correct the Tooth Profile 
Load Calculation: Find Torque 
Correction Applied: To Gear Ratio 
Strength Calculation Type: Based on given Material Strength 
Face Width Values: User Specified 
Place with full Assembly Relation: No 


CALCULATE RESULTS
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OUTPUT DESIGN PARAMETERS

GENERAL RESULTS
Actual Gear Ratio: 1 
Total Unit Correction: 0 
Contact Ratio: 1.621 
Tangential Pressure Angle: 20.00 ° 
Operating Pressure Angle: 20.00 ° 
Tan. Operating Pressure Angle: 20.00 ° 
Base Helix Angle: 0.00 ° 
Product Center Distance: 26.00 mm 
Tangential Module: 1.00 mm 
(Pc) Circular Pitch: 3.14 mm 
Tangential Circular Pitch: 3.14 mm 
(Pb) Base Circular Pitch: 2.95 mm 
Corrected Root Fillet: 0.30 mm 

Pinion:  
Face Width Ratio: 0.3846 
Unit Correction: 0 
Power: 1000.00 W 
Speed: 6000.000 deg/s 
Torque: 9.549 Nm

Gear:  
Face Width Ratio: 0.3846 
Unit Correction: 0 
Power: 920.00 W 
Speed: 6000.000 deg/s 
Torque: 9.549 Nm

STRENGTH VALIDATION

Pinion:  
Allowable Bending Stress: 472610.000 kPa 
Safety Factor in Bending: 1.07 
Allowable Pitting Stress: 1014870.000 kPa 
Safety Factor in Pitting: 0.85 

Gear:  
Allowable Bending Stress: 304660.000 kPa 
Safety Factor in Bending: 0.69 
Allowable Pitting Stress: 1014870.000 kPa 
Safety Factor in Pitting: 0.89 

FORCES
Tangential Force: 734561.276 mN 
Radial Force: 267358.440 mN 
Normal Force: 781703.782 mN 
Circumferential Velocity: 1.361 m/s
Resonance Speed: 273968.121 deg/s 
Axial Force: 0.000 mN 

BASIC DIMENSIONS

Pinion:  
(db) Base Diameter: 24.43 mm 
(da) Outside Diameter: 28.00 mm 
(d) Pitch Diameter: 26.00 mm 
(dr) Root Diameter: 23.50 mm 
Work Pitch Diameter: 26.00 mm 
(T) Chordal Thickness: 1.39 mm 
(ht) Chordal Thickness Height: 0.75 mm 
(M) Chordal Dimension: 7.38 mm 
(S) Tooth Thickness: 1.84 mm 

Gear:  
(db) Base Diameter: 24.43 mm 
(da) Outside Diameter: 28.00 mm 
(d) Pitch Diameter: 26.00 mm 
(dr) Root Diameter: 23.50 mm 
Work Pitch Diameter: 26.00 mm 
(T) Chordal Thickness: 1.39 mm 
(ht) Chordal Thickness Height: 0.75 mm 
(M) Chordal Dimension: 7.38 mm 
(S) Tooth Thickness: 1.84 mm 

FACTORS OF ADDITIONAL LOAD

Pinion:  
Dynamic Factor: 1.004 
Face Load Factor: 1.069 
Transverse Load Factor: 1 

Gear:  
Dynamic Factor: 1.004 
Face Load Factor: 1.057 
Transverse Load Factor: 1 

FACTORS FOR CONTACT
Elasticity Factor: 189.81 
Zone Factor: 2.495 
Contact Ratio Factor: 0.8905 
Lubricant Factor: 0.9368 
Velocity Factor: 0.9503 
Helix Angle Factor: 1 
Work Hardening Factor: 1 

Pinion:  
Life Factor: 1 

Gear:  
Life Factor: 1 

FACTORS FOR BENDING
Helix Angle Factor: 1 
Contact Ratio Factor: 0.7127 

Pinion:  
Form Factor: 3.123 
Stress Correction Factor: 2.119 
Life Factor: 1 
Notch Sensitivity Factor: 1.302 

Gear:  
Form Factor: 3.123 
Stress Correction Factor: 2.119 
Life Factor: 1 
Notch Sensitivity Factor: 1.302 

GEARING PARAMETERS
Limit Deviation of Helix Angle: 0.00 mm 
Limit Deviation of Helix Axis Parallelity (Fx): 0.00 mm 
Limit Deviation of Helix Axis Parallelity (Fy): 0.00 mm 

GEAR PARAMETERS

Pinion:  
Limit Deviation of Axial Pitch: 0.00 mm 
Limit Deviation of Basic Pitch: 0.00 mm 

Gear:  
Limit Deviation of Axial Pitch: 0.00 mm 
Limit Deviation of Basic Pitch: 0.00 mm 

STRENGTH VALIDATION FAILURE
1: The Pinion material strength is not adequate to avoid failure due to pitting while transmitting input power. 
2: The Gear material strength is not adequate to avoid failure due to pitting while transmitting input power. 
3: The Gear material strength is not adequate to withstand the bending load generated while transmitting input power. 


END OF REPORT