3 Jaws Normal
A 3-jaw normal scroll chuck is the most widely used workholding device on engine and CNC lathes, accounting for roughly 80% of all lathe chuck applications. It is optimized for speed, repeatability, and efficiency in mass production environments
Description
3 Jaws Normal
A 3-jaw normal scroll chuck is the most widely used workholding device on engine and CNC lathes, accounting for roughly 80% of all lathe chuck applications. It is optimized for speed, repeatability, and efficiency in mass production environments
Key Features of 3-Jaw Automotive Pullers
- Balanced Force Distribution (120° Spacing): Unlike 2-jaw pullers, the three jaws are spaced exactly 120 degrees apart. This symmetrical geometry distributes pulling pressure evenly around the circumference of the part, preventing the component from tilting, binding, or slipping during extraction.
- Reversible Jaws: Most standard workshop pullers feature reversible arms. The jaws can be flipped to switch between external pulling (gripping the outside edge of a pulley) and internal pulling (expanding inside a cavity or blind hole to pull a bearing out).
- Adjustable Reach and Spread: The arms are designed with multiple mounting holes along the upper yoke. This allows automotive technicians to adjust the tool's maximum diameter (spread) and depth (reach) to accommodate varying car part sizes]
- Hardened Threaded Center Screw (Force Screw): The center drive bolt features a fine, heat-treated Acme thread designed to deliver smooth torque transfer. The high-hardness steel construction allows it to bear massive physical loads when turned by a standard hand ratchet, air impact wrench, or combination spanner.
- Heavy-Duty Construction: Built from forged, heat-treated Chrome Vanadium (Cr-V) steel or high-carbon steel, these tools are treated with anti-corrosive coatings to withstand the harsh chemicals, oils, and high-impact environments of an active shop
Specification
| Parameter | Specification Details |
|---|---|
| 2" Chuck | 50 mm N/A 2 – 14 mm (0.08" – 0.55") 25 – 33 mm (0.98" – 1.30") |
| 3" Chuck | 80 mm 16 mm (0.63") 2 – 22 mm (0.08" – 0.87") 22 – 63 mm (0.87" – 2.48") |
| 4" Chuck | 100 mm 22 mm (0.87") 2 – 30 mm (0.08" – 1.18") 30 – 80 mm (1.18" – 3.15") |
| 5" Chuck | 125 mm 30 mm (1.18") 2.5 – 40 mm (0.10" – 1.57") 38 – 110 mm (1.50" – 4.33") |
| 6" Chuck | 160 mm 40 mm (1.57") 3 – 55 mm (0.12" – 2.17") 55 – 145 mm (2.16" – 5.71") |
| Nominal Size (Inches) | Outer Diameter (mm) Center Through-Hole Clamping Range: Inside Jaws (Clamping OD) Clamping Range: Outside Jaws (Clamping ID) |
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