Spindle Cover Chuck Nut / Lock Nut Front Cover for Vertical Milling Machine Part No.: B-133
High-precision spindle cover lock nut (Model B133) designed for Bridgeport-type vertical milling machines. Used as the front spindle cover nut to secure and protect the spindle bearing housing.
Specifications
For: Part No.: B-133- Model
- B-0133
- Outer Diameter (Top)
- 75 mm
- Inner Diameter (I.D.)
- 47 mm
- Outer Diameter (Base)
- 85 mm
- Thread Pitch
- 1.25 mm
- Thread Type
- External metric thread
- Material
- Heat-treated alloy steel
- Suitable for Spindle
- R8/NT30/NT40
- Packing Size
- 100x100x50 mm
- Weight Approx
- 1.5 Kgs
Features:
- Precision-ground internal seating
- Strong external metric thread (Pitch 1.25)
- Rugged construction for industrial use
- Ensures accurate spindle alignment
- Protects front bearings and spindle assembly
- Compatible with most Bridgeport-style milling machines
Applications:
- Vertical turret milling machines
- Bridgeport-type milling machines
- Spindle bearing housing locking
- Milling head servicing & spindle rebuild
Description
The B133 Spindle Cover Nut / Front Lock Nut is a critical component used on vertical turret milling machines (Bridgeport type).
It is installed on the front side of the spindle head to:
- Lock the spindle bearing housing
- Maintain preload and alignment
- Seal the spindle front area
- Protect internal bearings from dust, chips, and coolant
Manufactured from high-strength alloy steel and machined to tight tolerances, this lock nut ensures long-term stability and smooth spindle rotation.
More questions buyers ask
What is the primary function of the Pentagon B-0133 Spindle Lock Nut?
The B-0133 lock nut is designed to secure the spindle bearing housing, maintain preload, and protect the front spindle assembly from dust and debris in vertical milling machines.
Is the Pentagon B-0133 compatible with Bridgeport milling machines?
Yes, it is designed as a direct replacement or compatible spare for most Bridgeport-style vertical turret milling machines.
What material is the B-0133 spindle nut made of?
It is manufactured from high-strength, heat-treated alloy steel to ensure durability and long-term stability under industrial operating conditions.
What are the key dimensions of this spindle cover nut?
The nut features an 85 mm base outer diameter, 75 mm top outer diameter, and a 1.25 mm thread pitch.
Does this nut fit R8 spindles?
Yes, it is suitable for use with R8, NT30, and NT40 spindles commonly found in turret milling machines.
How does this nut protect the spindle?
By sealing the front spindle area, it prevents metal chips, coolant, and dust from entering the bearing housing, thereby extending the life of the spindle bearings.
Is a GST invoice provided with the purchase?
Yes, all purchases include a valid GST invoice for business accounting purposes.
What is the weight of the Pentagon B-0133 spindle nut?
The unit weighs approximately 1.5 kg.
Can this be used for spindle rebuilds?
Absolutely, it is a standard replacement component used during milling head servicing and spindle rebuilds.
What is the thread pitch of the B-0133?
The thread pitch is 1.25 mm.
Who should choose the Pentagon B-0133 Spindle Lock Nut?
This nut is ideal for maintenance engineers and workshop owners performing repairs or upgrades on Bridgeport-style vertical milling machines.
How does the B-0133 compare to generic spindle nuts?
The Pentagon B-0133 is precision-ground from heat-treated alloy steel, offering superior fit, alignment, and durability compared to standard aftermarket alternatives.
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Full description
High-precision spindle cover lock nut (Model B133) designed for Bridgeport-type vertical milling machines. Used as the front spindle cover nut to secure and protect the spindle bearing housing.