Pentagon Clock Spring Spiral Spring for M1TR Milling Machine Model Mill- B178
The Spindle Up & Down Clock Spring (also known as a quill return spring) is a key component in vertical and turret milling machines. It provides controlled tension for the spindle/quill return mechanism, ensuring smooth and stable vertical movement during machining operations. • Outer Diameter: 154 mm • Tensile Strength: 1500–1800 MPa • Load Capacity: 15–45 N • Material: High-Carbon Spring Steel (HCS) / EN47
Specifications
For: Model Mill- B178- Machine Type
- M1TR Vertical Milling machine
- Model No.
- Mill - B178
- Material
- High-Carbon Spring Steel (HCS) / EN47
- Outer Diameter
- 154 mm
- Function
- Milling Machine Spindle Up & Down Movement
- Product Type
- Clock Spring / Quill Return Spring
- Tensile Strength
- 1500–1800 MPa
- Thickness
- 0.8-1.2 mm
- Width
- 25 mm
- Load Capacity
- 15–45 N
- Compatibility
- Universal for vertical & turret milling machines (M1TR, M2TR, M3TR, RAM Type, etc.)
- Packing Size
- 50x50x30 mm
- Weight
- 0.5 kgs
Installation & Maintenance Tips
- Inspect spring for cracks or permanent deformation before installation
- Ensure mounting holes align perfectly to avoid binding or misalignment
- Lubricate contact points sparingly to prevent dust accumulation
- Replace if spring loses tension or fails to return quill fully upward
- Store in dry environment to prevent corrosion on high-carbon steel
- Verify compatibility with specific machine model before purchase
Operational Load & Dimensions
- Outer diameter measures 154 mm for proper housing fitment
- Load capacity rated between 15–45 N for balanced spring action
- Compact packing size of 50x50x30 mm for easy storage and shipping
- Net weight of 0.5 kgs ensures minimal handling effort
- Model reference Mill - B178 indicates specific design configuration
- Robust build supports heavy-duty vertical milling applications
High-Carbon Steel Construction
- Manufactured from High-Carbon Spring Steel (HCS) / EN47 grade
- Delivers high tensile strength ranging from 1500–1800 MPa
- Thickness optimized between 0.8-1.2 mm for durability and flexibility
- Width standardized at 25 mm for secure mounting and load distribution
- Resists fatigue and deformation under repeated cyclic loading
- Engineered to withstand industrial vibration and operational stress
Precision Quill Return Mechanism
- Ensures smooth up and down movement of the milling machine spindle
- Acts as a clock spring to automatically return the quill to its upper position
- Provides consistent tension for precise tool positioning during operations
- Compatible with M1TR, M2TR, M3TR, and RAM type vertical mills
- Designed for universal fitment across standard turret milling machines
- Maintains optimal spring pressure for reliable cycle performance
More questions buyers ask
What is the function of the M1TR clock spring?
The clock spring, or quill return spring, ensures the smooth up and down movement of the milling machine spindle and automatically returns the quill to its upper position.
What material is the Pentagon M1TR clock spring made of?
It is manufactured from high-carbon spring steel (HCS/EN47 grade), providing high tensile strength and fatigue resistance.
What is the outer diameter of this quill return spring?
The outer diameter of the spring is 154 mm.
Is this spring compatible with other milling machines?
Yes, it is designed for universal fitment across standard turret milling machines, including M1TR, M2TR, M3TR, and RAM type vertical mills.
What is the tensile strength of the spring?
The spring features a high tensile strength ranging from 1500–1800 MPa.
What is the thickness of the spring material?
The material thickness is optimized between 0.8 mm and 1.2 mm.
How do I know when to replace the quill return spring?
Replace the spring if it loses tension, fails to return the quill fully upward, or shows signs of cracks or permanent deformation.
What is the width of the spring?
The spring width is standardized at 25 mm.
Does Pentagon provide a warranty for this spare part?
Pentagon Machines and Tools offers standard industrial warranty support for their spare parts; please contact your authorized dealer for specific terms.
Can I get a GST invoice for this purchase?
Yes, all purchases include a valid GST invoice for business accounting purposes.
Who should choose the Pentagon B178 Clock Spring?
This spring is ideal for machine shop operators and maintenance technicians working with M1TR or similar turret milling machines who require a reliable, high-strength replacement for smooth spindle operation.
How does the B178 compare to generic quill springs?
The Pentagon B178 is engineered with high-carbon EN47 steel for superior fatigue resistance and precise tension, outperforming generic springs that may lose elasticity quickly under heavy-duty industrial use.
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Full description
The Spindle Up & Down Clock Spring (also known as a quill return spring) is a key component in vertical and turret milling machines. It provides controlled tension for the spindle/quill return mechanism, ensuring smooth and stable vertical movement during machining operations.
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• Outer Diameter: 154 mm • Tensile Strength: 1500–1800 MPa • Load Capacity: 15–45 N • Material: High-Carbon Spring Steel (HCS) / EN47