Pentagon Spindle Quill Return Spring Housing Cover Case for Vertical Milling Machine Part No.:B-177
Durable spindle quill return spring cover/case designed to house and protect the quill return spring mechanism in vertical milling machines. Suitable for Bridgeport-type and similar turret milling machines.
Specifications
For: Part No.:B-177- Model
- B-0177
- Product Name
- Spring Housing Cover
- Inner Diameter (I.D.)
- 45 mm
- Outer Diameter (Barrel O.D.)
- 50 mm
- Overall Height
- 38 mm
- Internal Depth (Spring Housing Depth)
- 25 mm
- Flange Outer Diameter
- 68 mm
- Number of Mounting Holes
- 8 Nos
- Material
- Hardened Steel / Alloy Steel
- Packing Size
- 100x75x75 mm
- Weight Approx
- 0.3 Kgs
Features:
- Protects the quill return spring assembly from wear & contamination
- Ensures smooth upward return motion of spindle quill
- Precision-machined for perfect alignment
- Easy installation with 6 mounting holes
- Compatible with most Bridgeport-style milling machines
- Rugged alloy-steel construction
- Corrosion-resistant black oxide finish
- Deep spring housing improves spring stability
- 8-hole flange for secure mounting
Applications:
- Spindle quill return spring mechanism
- Vertical turret milling machines
- Bridgeport-type milling machine repairs
- Milling machine rebuild & servicing
- Vertical turret milling machines
- Bridgeport-type milling heads
- Machine repair & service
- CNC / manual milling machine maintenance
Description
The Spindle Quill Return Spring Cover Case is an essential protective housing used in vertical turret milling machines. It encloses the quill return spring, ensuring smooth and safe retraction of the spindle quill during operation.
Made of high-strength steel, this cover prevents dust, chips, and coolant ingress into the spring mechanism, increasing service life and maintaining consistent quill movement.
Its accurate mounting holes and machined diameter guarantee compatibility with standard milling head designs.
Advantages:
- Increases lifespan of quill return spring
- Improves reliability of quill movement
- Reduces downtime caused by spring failure
- High strength, anti-corrosion body
More questions buyers ask
What is the purpose of a quill return spring housing cover?
It protects the quill return spring from dust, chips, and coolant, ensuring smooth spindle retraction and extending the spring's lifespan.
Is this cover compatible with Bridgeport milling machines?
Yes, this Pentagon B-0177 housing cover is designed to be compatible with most standard Bridgeport-style vertical turret milling machines.
What are the key dimensions of this spring housing cover?
It has an overall height of 38 mm, an internal depth of 25 mm, and an outer barrel diameter of 50 mm.
How many mounting holes does the B-0177 cover have?
This model features an 8-hole flange for secure and precise mounting to the milling head.
What material is the Pentagon B-0177 cover made of?
It is constructed from high-strength alloy steel with a corrosion-resistant black oxide finish for durability.
Can this part be used for CNC milling machines?
Yes, it is suitable for both manual and CNC vertical turret milling machines that follow standard Bridgeport-style designs.
Does the cover come with a warranty?
Pentagon Machines and Tools provides standard manufacturer warranty support. Please check the specific invoice details for coverage.
How do I know if this fits my milling machine?
Compare your existing housing dimensions (50mm O.D., 38mm height, 8-hole pattern) with the B-0177 specifications provided.
Is this an OEM or replacement part?
This is a high-quality replacement part designed to meet or exceed original specifications for milling machine maintenance.
What is the weight of the spring housing cover?
The unit weighs approximately 0.3 kg.
Who should choose the Pentagon B-0177 Spring Housing Cover?
It is ideal for machine shop owners and maintenance technicians performing repairs or rebuilds on Bridgeport-style vertical milling heads.
How does this compare to generic spring covers?
The Pentagon B-0177 offers precision machining, a robust 8-hole mounting flange, and a corrosion-resistant finish, ensuring better reliability than unbranded alternatives.
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Full description
Durable spindle quill return spring cover/case designed to house and protect the quill return spring mechanism in vertical milling machines. Suitable for Bridgeport-type and similar turret milling machines.




















