Document Overview

This document is a compilation of technical drawings and specifications for various mechanical components and assemblies produced by Tulsa Winch Group (TWG). It includes detailed dimensional data, performance parameters, material and finish requirements, and installation instructions for winch-related parts and gearboxes.

Main Sections and Summaries

1. General Specifications and Manufacturing Notes

• All dimensions are provided in inches.
• Material removal requirements: minimum 6% on finish surfaces, 12% on diameters.
• Inside corner radii: 0.03 inches; outside chamfer: 0.03 inches at 45°.
• All burrs must be removed and sharp edges broken.
• Fastener torque must comply with EN11000 standards.
• Tolerances specified as follows: 1 decimal place ±0.100, 2 decimal places ±0.030, 3 decimal places ±0.010, angles ±2°, concentricity 0.010 Total Indicator Reading (TIR).
• Machine finish surface roughness: 125 microinches.
• Drawings are proprietary to TWG; reproduction or data sharing requires explicit approval.

2. Performance Data and Mechanical Parameters

• Multiple winch models and gearboxes are detailed, including H938, H1060, H1242, H12, H18G, and H24.
• Input speeds range from 500 to 1,200 RPM depending on model.
• Input torque maximums vary from approximately 793 in-lbs to 4,187 in-lbs.
• Gearbox ratios range from 30:1 to 60:1.
• Dynamic efficiencies of gearboxes range between 51.3% and 62%.
• Cable diameters specified from 0.38 to 0.63 inches.
• Hydraulic parameters for some models include pressures up to 1,600 PSI and flow rates of 20 gallons per minute.
• Winch line pull and speed data are provided per cable layer, showing decreasing line pull and increasing line speed with each successive layer.

3. Installation and Assembly Instructions

• Detailed dimensional drawings include mounting hole sizes, shaft dimensions, keyways, and grease zerk locations.
• Instructions for gearbox oil fill, venting, and draining are specified, including oil types and quantities (e.g., EP-140 oil, 1 to 4.5 quarts depending on model).
• Units are primed with gray or black primer as noted.
• Brake oil fill instructions specify use of lightweight non-EP oil in some models.
• Clutch lever and drum rotation directions are indicated for proper operation.

4. Notes on Revisions and Compliance

• Revision history includes changes to worm gear quantities, mounting hole sizes, and addition of slots for drag brake mounts.
• Some cable layers do not meet SAE J706 JUL85 specifications for freeboard clearance, noted explicitly.
• Fastener torque and other assembly parameters must comply with EN11000 standards.

5. Critical Parameters and Limitations

• Concentricity tolerance is tightly controlled at 0.010 TIR to ensure proper mechanical alignment.
• Material removal and surface finish requirements ensure durability and fit.
• Maximum input speeds and torques must not be exceeded to avoid damage.
• Hydraulic pressures and flows must be maintained within specified limits for safe operation.
• Some performance layers have reduced line pull capacity and speed, affecting operational limits.

6. Summary of Key Dimensions and Performance Data (Extracted)

7. Best Practices and Recommendations

• Strict adherence to specified tolerances and surface finishes is critical for component longevity and performance.
• Proper torque application per EN11000 ensures mechanical integrity and safety.
• Regular maintenance including oil level checks and grease application at zerk fittings is necessary.
• Use only specified oils and primers to maintain warranty and performance standards.
• Do not scale drawings; always work to provided dimensions.

Conclusion

This document provides comprehensive technical data for TWG winch components, emphasizing precision manufacturing, performance parameters, and installation guidelines. Compliance with specified tolerances, material treatments, and assembly instructions is essential for safe and efficient operation of the equipment.