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Value Comparison of Combination Wrenches

Value Comparison of Combination Wrenches. MECH 309 WSU Vancouver Department of Mechanical Engineering. Team B Jay Lui Todd May Cameron Muller Tony Nguyen Mason O’Lennick Alex Paradis Daniel Peterson Patrick Phillips Trevor Pope Jonathan Shaffer. Testing Procedures.

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Value Comparison of Combination Wrenches

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  1. Value Comparison of Combination Wrenches MECH 309 WSU Vancouver Department of Mechanical Engineering Team B Jay Lui Todd May Cameron Muller Tony Nguyen Mason O’Lennick Alex Paradis Daniel Peterson Patrick Phillips Trevor Pope Jonathan Shaffer

  2. Testing Procedures Criteria for Comparison: • Cost • Microstructure Observations • Oxidization • Hardness • Tolerance • Bending/Failure

  3. Cost Combination Wrench Manufacturers Tested:

  4. Microstructure Pittsburgh: Master Mechanic: Husky Pro: Craftsman: Snap-on:

  5. Microstructure Pittsburgh: Master Mechanic: Craftsman: Snap-on: Husky Pro:

  6. Pre-Oxidation

  7. Post-Oxidation

  8. Hardness

  9. Open-End Testing The Amount of Play in the Open-End of Each Wrench Correlated to Slippage Torque Applied via Torque Wrench Along Wrench to Maintain Line of Action Each Wrench Head Plastically Deformed Around Test Bolt Preventing Fracture

  10. Open-End Tolerance

  11. Open-End Failure Results

  12. t Handle Failure Results Pittsburgh Snap-on Husky Craftsman Master Mechanic

  13. Handle Failure Results

  14. Handle Failure Results

  15. Conclusions • Husky • Best value, good toughness and low-cost • Warranty may not be as good as high-cost wrenches • Snap-on • Performed well but the high cost makes it a lower value • Has excellent warranty and highest failure points • Craftsman • Best choice if failure is a concern • Good value and lifetime warranty • Master Mechanic • Performed adequately • But for $2 more, the best value wrench, Husky, could be purchased instead • Pittsburgh • Low-cost was evident with its low failure points and inconsistency

  16. Questions ?

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