BT40 Pull Stud with 90° Head Angle – CNC Retention Knob | Block to Box
Secure your CNC tool holders with BT40 Pull Studs (90° head) from Block to Box — precision-engineered for tight clamping, smooth drawbar engagement, and long operational life.
Manufactured from hardened alloy steel, these pull studs are built to withstand high-tensile loads and vibration in automated tool-changing environments. The 90° head design is ideal for many standard VMCs and CNC milling machines that require flat-face engagement.
Product Highlights:
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Taper Type: BT40
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Head Type: 90° (Flat face)
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Material: Hardened alloy steel
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Surface Finish: Anti-rust black oxide coating
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Tensile Strength: 1100–1200 N/mm²
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Application: CNC, VMC, ATC-compatible tool holders
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Machining Standard: DIN/ISO compliant
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Thread Type: M16 (standard for BT40 – verify as needed)
Benefits:
- Improved accuracy
- Enhanced safety
- Increased productivity
- Reduced downtime
- Enhanced tool life
Applications:
- Ideal for a wide range of machining applications, including milling, drilling, and boring, on various CNC machines.
1. What is a BT40 90° Pull Stud used for?
A BT40 90° Pull Stud (also called a retention knob) connects the BT40 tool holder to the CNC machine’s drawbar. The 90° head fits specific spindle mechanisms that require flat-face contact for secure tool retention.
2. How is a 90° Pull Stud different from a 45° or 60° one?
The head angle determines how the drawbar grips the pull stud. A 90° pull stud has a flat-head engagement, while 45° or 60° studs have tapered heads. Always check your machine's manual for compatibility.
3. Is this pull stud compatible with all BT40 tool holders?
Yes, it fits all standard BT40 holders, but you must confirm if your machine requires a 90° head type before purchase.
4. What material is used for Block to Box pull studs?
We use heat-treated, high-tensile alloy steel for strength and durability. Our pull studs are black-oxide coated for corrosion resistance.
5. Can these pull studs be used in automatic tool changers (ATC)?
Yes, BT40 90° pull studs from Block to Box are ATC-compatible, offering reliable performance even in high-speed CNC machines.
6. How often should I replace a BT40 pull stud?
Pull studs should be inspected regularly for wear, cracking, or rounding at the head. In high-volume shops, replacement every 6–12 months is recommended.
7. Do you offer bulk discounts or dealer pricing?
Yes, we support bulk orders, OEM supply, and dealer pricing. Contact our sales team for quotes.
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