I. Design Considerations:
* Mounting Point: Identify a strong, accessible point on your Blazer's frame or body to mount the hoist. The rear bumper or the tailgate area are likely candidates, but ensure the mounting point can handle the weight of the spare tire. Consider reinforcement if necessary.
* Hoist Mechanism: The simplest mechanism is a cable and pulley system. A more complex but smoother option could be a winch or a hydraulic ram.
* Tire Carrier: This will hold the spare tire. It could be a simple bracket or a more elaborate cradle depending on your spare tire's size and mounting style.
* Safety: This is paramount. The hoist must be strong enough to reliably support the tire's weight, and a safety mechanism (e.g., a latch or locking pin) should prevent accidental release.
II. Materials:
* Steel Tubing or Square Stock: For the main frame and support brackets. Choose a gauge thick enough to withstand the load.
* Cable or Chain: For lifting the tire. Use a high-strength cable rated for significantly more weight than the spare tire.
* Pulley(s): If using a cable and pulley system. Ensure they're rated for the load.
* Winch or Hydraulic Ram (Optional): For a more automated system.
* Fasteners: Bolts, nuts, washers, and potentially welding materials.
* Paint (Optional): To protect the metal from rust.
III. Fabrication Steps (Cable and Pulley Example):
1. Design and Sketch: Create detailed drawings of your hoist, specifying dimensions and material thicknesses.
2. Cut and Shape: Cut the steel tubing/square stock to the required lengths and shape them according to your design. Use a metal cutting saw, angle grinder, or plasma cutter.
3. Fabrication of the Tire Carrier: Weld or bolt together a bracket or cradle that securely holds your spare tire.
4. Mount the Hoist: Weld or securely bolt the main frame to your chosen mounting point on the Blazer. Reinforce the mounting point if needed.
5. Install the Pulley(s): Securely attach the pulley(s) to the frame.
6. Attach the Cable: Run the cable through the pulley(s) and connect it to the tire carrier.
7. Safety Mechanism: Integrate a latch or locking pin to prevent accidental release.
8. Testing and Refinement: Carefully test the hoist with the spare tire to ensure stability and functionality. Make adjustments as needed.
9. Painting (Optional): Apply paint to protect the metal from corrosion.
IV. Safety Precautions:
* Wear appropriate safety gear: Safety glasses, gloves, and hearing protection.
* Use proper welding techniques: If welding, ensure adequate ventilation and use a welding mask.
* Over-engineer: Design your hoist to handle more weight than your spare tire to provide a safety margin.
* Inspect regularly: Check the hoist for wear and tear before each use.
V. Alternatives:
* Purchase a pre-made kit: While less customizable, this is a much simpler and safer option if you lack fabrication skills. Many off-road suppliers offer such kits.
* Consult a professional: If you're unsure about any aspect of the fabrication process, seek the help of a qualified welder or fabricator.
This is a general guideline. The specific steps and materials will depend on your design and available resources. Remember that safety is paramount – don't attempt this project if you lack the necessary skills and tools. Improperly fabricated hoists can be dangerous.
