simple plans to build small jaw crusher

# Simple Plans to Build a Small Jaw Crusher

Building a small jaw crusher can be a rewarding DIY project for those interested in crushing rocks, ore, or demolition waste for recycling purposes. Below is a straightforward guide to constructing a simple yet functional jaw crusher using basic materials and tools.

## Materials Needed:
- Steel Frame: Angle iron or square tubing (for the crusher body)
- Jaw Plates: Hardened steel plates (one fixed, one movable)
- Eccentric Shaft: A rotating shaft to drive the movable jaw
- Bearings: Pillow block bearings (to support the shaft)
- Flywheel: To maintain momentum (can be repurposed from old machinery)
- Motor & Pulleys: A small electric motor (~1–3 HP) with V-belts for power transmission
- Bolts & Fasteners: For assembly

## Step-by-Step Construction Plan

1. Design & Frame Construction
- Sketch a basic design with dimensions (~12"–16" wide jaws).
- Weld angle iron or square tubing into a sturdy rectangular frame.

2. Mounting Jaw Plates
- Cut two steel plates (~¼"–½" thick) into trapezoidal shapes for crushing efficiency.
- Bolt/weld one plate (fixed jaw) vertically inside the frame.
- Attach the second plate (movable jaw) to an eccentric shaft so it moves elliptically when rotated.

3. Installing Shaft & Bearings
- Mount pillow block bearings on either side of the frame to hold the eccentric shaft securely.
- Ensure smooth rotation—misalignment will cause excessive wear.

4. Adding Flywheel & Motor Drive
- Attach a flywheel (or heavy pulley) to one end of the shaft for momentum balance.
- Connect an electric motor via V-belts and pulleys (~300–500 RPM recommended).

5. Adjusting Crushing Gap & Safety Features
- Use spacers/wedges behind the movable jaw to adjust output size (~¼"–1").
- Install guards around moving parts (belts, flywheel) for safety.

## Operation Tips: