Pentagon Pulley Bearing Sleeve 12mm for Vertical Milling Machine Model A0411
The A4+11 Spindle Pulley Bearing Sleeve is a precision-machined support sleeve designed to ensure smooth rotation and proper alignment of the spindle pulley in vertical and turret milling machines. • Chuck nut bore bottom: 43.2 mm • Chuck nut width: 14 mm • Chuck nut bore top: 51 mm • Inner diameter bottom: 55 mm
Specifications
For: Model A0411- Product Name
- Spindle Pulley Bearing Sleeve
- Model No.
- A0411-12
- Wall Thicness
- 12.2 mm
- Inner Diameter Bottom
- 55 mm
- Chuck nut Bore bottom
- 43.2 mm
- Inner Diameter Top
- 62 mm
- Total Height
- 81 mm
- Screw Size
- 6mm / 8mm
- Chuck nut Width
- 14 mm
- Chuck nut bore Top
- 51 mm
- Outer diameter Bottom
- 101.4 mm
- Outer diameter top
- 85.7 mm
- Packing Size
- 100x90x90 mm
- Weight
- 3.4 Kgs
Installation and Maintenance Guidelines
- Ensure spindle shaft and bearing seats are clean and free of burrs before installation
- Apply appropriate lubricant to mating surfaces to prevent galling during assembly
- Verify correct orientation of the sleeve to match the machine's drive configuration
- Torque chuck nuts to manufacturer specifications to avoid loosening during operation
- Regularly inspect for signs of wear, scoring, or deformation on inner and outer diameters
- Replace immediately if any dimensional deviation exceeds acceptable tolerance limits
- Store spare units in dry, climate-controlled environments to prevent surface oxidation
- Use proper lifting techniques due to significant weight; handle with care to avoid damage
Versatile Industrial Applications
- Ideal replacement part for vertical milling machines requiring spindle maintenance
- Suitable for general-purpose metalworking shops and jobbing workshops
- Supports operations involving steel, aluminum, cast iron, and other conductive metals
- Used in repair and retrofit projects for legacy milling equipment upgrades
- Fits applications requiring precise speed variation via pulley belt adjustments
- Essential component for maintaining spindle performance in automated production lines
- Recommended for heavy-duty cutting operations that demand high rigidity
- Compatible with various milling head designs found in modern CNC and manual mills
Robust Construction and Material Quality
- Fabricated from high-grade steel alloys for exceptional wear resistance and longevity
- Heat-treated surfaces to withstand friction and thermal stress during continuous use
- Precision-machined internal bores ensure consistent fit across all production batches
- Outer cylindrical surfaces ground for optimal bearing seat contact and load distribution
- Resistant to coolant exposure and oil degradation typical in machining environments
- Maintains structural integrity under high torque loads without deformation
- Corrosion-resistant finish options available for extended service life in humid conditions
- Rigorous quality control ensures each unit meets strict dimensional accuracy standards
Precision Spindle Assembly Components
- Designed as a critical spindle pulley bearing sleeve for vertical milling machines
- Ensures stable rotational alignment and reduces vibration during high-speed operations
- Features a robust stepped design with distinct top and bottom diameters for secure mounting
- Engineered to support heavy axial and radial loads common in industrial milling tasks
- Provides precise clearance fit for spindle shafts, ensuring smooth power transmission
- Compatible with standard chuck nut configurations for reliable tool holding stability
- Manufactured to tight tolerances to maintain concentricity and minimize runout
- Serves as a durable interface between the drive pulley and the main spindle bearing
More questions buyers ask
What is a spindle pulley bearing sleeve used for in a milling machine?
It acts as a critical interface between the drive pulley and the main spindle, ensuring stable rotational alignment, reducing vibration, and supporting axial/radial loads.
What are the key dimensions of this Pentagon pulley bearing sleeve?
It features a 12.2mm wall thickness, 55mm inner diameter (bottom), 62mm inner diameter (top), and 43.2mm chuck nut bore (bottom).
Is this sleeve compatible with Bridgeport-style milling machines?
Yes, this component is designed as a high-precision replacement part compatible with many vertical milling machines, including standard turret mill configurations.
What material is the Pentagon pulley bearing sleeve made of?
It is fabricated from high-grade steel alloys, heat-treated for wear resistance, and precision-ground for optimal bearing seat contact.
How do I ensure the correct installation of the sleeve?
Ensure the spindle shaft and bearing seats are clean, apply lubricant to mating surfaces, verify orientation, and torque chuck nuts to manufacturer specifications.
Does this part come with a warranty?
Pentagon Machines and Tools provides standard industrial warranty coverage. Please contact our support team with your invoice for specific details.
Can this sleeve be used for heavy-duty cutting operations?
Yes, its robust construction and heat-treated surface are engineered to maintain structural integrity under high torque loads and continuous industrial use.
What is the weight of this spindle pulley bearing sleeve?
The unit weighs approximately 3.4 Kgs.
How often should I inspect the pulley bearing sleeve?
Regularly inspect for signs of wear, scoring, or deformation. Replace immediately if any dimensional deviation exceeds acceptable tolerance limits.
Do you provide GST invoices for this purchase?
Yes, all purchases include a valid GST invoice for your accounting and tax credit requirements.
Is pan-India delivery available for this spare part?
Yes, we offer reliable, pan-India delivery for all our industrial machine spares and accessories.
Who should choose the Pentagon A0411-12 Spindle Pulley Bearing Sleeve?
This sleeve is ideal for maintenance engineers and workshop owners looking for a high-precision, durable replacement part for vertical milling machine spindle assemblies.
How does the Pentagon sleeve compare to generic aftermarket parts?
Unlike generic parts, Pentagon sleeves are precision-machined to tight tolerances, heat-treated for longevity, and designed specifically for consistent fit in industrial milling environments.
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Full description
The A4+11 Spindle Pulley Bearing Sleeve is a precision-machined support sleeve designed to ensure smooth rotation and proper alignment of the spindle pulley in vertical and turret milling machines. • Chuck nut bore bottom: 43.2 mm • Chuck nut width: 14 mm • Chuck nut bore top: 51 mm • Inner diameter bottom: 55 mm