FOR SALE VICE FOR MACHINE TOOLS BRAND ALLEN MODEL MU / 90.

Technical Data Sheet Used Allen Vise, Model MU/90

1. General Description

The Allen Model MU/90 vise is a precision piece of equipment designed to ensure secure and stable workpiece holding during machine tool operations. It is primarily used in machine shops and precision laboratories. Since it is a used model, it is important to assess its condition and understand its technical specifications.

2. Main Components

• Vise Body: Made of cast iron or high-strength steel, the body provides a sturdy base for clamping. Cast iron is often used for its vibration-absorbing properties and stability.

• Chuck: The moving part that moves along the body of the vise and allows it to open and close. It is operated by a crank or screw mechanism.

• Clamping Jaws: Interchangeable surfaces on which workpieces are clamped. They can be fixed or movable and are designed to accommodate workpieces of various shapes and sizes.

• Clamping Screws: Used to adjust the distance between the jaws and hold the workpiece in place. They can be trapezoidal or rack-and-pinion type.

• Crank or Operating Lever: Allows you to apply adjustable clamping force to the workpiece. The crank is often equipped with a speed reduction mechanism for fine adjustment.

3. Dimensions and Technical Specifications

• Vice Length: Typically between 200 and 400 mm. The MU/90 model may specifically be around 250 mm.

• Maximum Opening: Opening capacity varies between 100 and 250 mm. For the MU/90 model, it is usually around 125 mm.

• Clamp Height: Generally between 100 and 200 mm.

• Weight: Weight can vary between 20 and 60 kg depending on size and sturdiness. The MU/90 weighs around 30-40 kg.

• Clamping Accuracy: Clamping accuracy is typically ±0.01 mm, ensuring a high degree of precision when machining workpieces.

4. Mechanical Characteristics

• Clamping System: Uses a trapezoidal screw or rack mechanism to ensure uniform clamping force. The crank can be equipped with a transmission system for easier movement.

• Adjustability: The jaws can be adjusted to accommodate workpieces of various shapes and sizes. Some models have the ability to tilt the jaws for angular clamping.

• Durability and Stability: The cast iron or steel body ensures long life and good stability during operation.

5. Optimal Use Parameters

For optimal use of the Allen MU/90 vice, consider the following formulas and parameters:

• Clamping Force: The clamping force FF $F$ can be calculated as:

  $$F$$

  where TT $T$ is the applied torque and dd $d$ is the diameter of the tightening screw.

• Clamping Pressure: The pressure applied on the PP $P$ is:

  $$P$$

  where FF $F$ is the clamping force and AA $A$ is the contact area between the jaws and the workpiece.

• Uniformity of Clamping: Ensure that the pressure is evenly distributed to avoid warping the workpiece. Use a caliper to measure alignment and force distribution.

6. Workable Materials

The Allen MU/90 vise is suitable for a variety of materials, including:

• Ferrous Metals: Steel, cast iron.
• Non-Ferrous Metals: Aluminum, copper, bronze.
• Composite Materials: Hard plastic, synthetic materials.

7. Maintenance

• Cleaning: Keep the vise clean of chips and debris to prevent wear. Use a brush to remove debris and a protective oil to prevent rust.

• Lubrication: Lubricate screws and moving parts to maintain smooth operation. Use oils or greases specifically designed for precision equipment.

• Accuracy Check: Regularly check the accuracy of the clamping. Make sure the jaws are not worn and that the clamping mechanism operates smoothly.

• Parts Inspection: Check the jaws and clamping screws for cracks, wear, or damage. Replace any worn or damaged parts.

8. How to Evaluate a Good Used Car

• General Condition: Check the vise body for visible damage, such as cracks or warping.

• Functionality: Test the tightening mechanism to ensure it works smoothly and without play.

• Part Wear: Check the jaws and screws for wear and damage. Make sure all moving parts are in good condition.

• Stability and Precision: Check that the vise maintains precision and that there are no unexpected movements during tightening.

9. Sectors of Use

The Allen MU/90 vise is used in:

• Mechanical Workshops: For precise clamping of workpieces during machining operations such as milling and turning.
• Precision Laboratories: For the machining and assembly of delicate components.
• Manufacturing Industries: To ensure precision in the production of parts and components.

10. Why It's Better to Buy It Used

• Lower Cost: Buying a used vise significantly reduces costs compared to purchasing a new model.

• Reliability: When properly maintained, a used vise from a reputable brand like Allen can offer excellent performance and a long life.

• Repair and Upgrade Options: Buying used saves you money on upfront costs while leaving room for any necessary repairs or upgrades.

Conclusion

Buying a used Allen MU/90 vise can be a great choice if you're looking for a sturdy, precise tool at a more affordable price. Be sure to carefully assess the vise's condition and follow regular maintenance practices to ensure long-lasting, reliable use.