Pull Studs & Accessories
A complete and well-maintained tool holding system depends on far more than the tool holder itself. The accessories that accompany it — pull studs, collet nuts, spanners, sealing components, cleaning tools, and locking devices — each perform a specific and important role in ensuring secure clamping, accurate positioning, and reliable performance at the spindle.
Whether setting up a new tool, maintaining an existing assembly, or optimising coolant delivery, the right accessory makes each operation safer, faster, and more repeatable. This range of pull studs and accessories is designed to complement industry-standard tool holders, supporting efficient setup and long-term machining reliability across a wide variety of CNC applications.
Why Accessories Matter
- System Integrity: Correct accessories ensure every component of the tool holding assembly functions as intended.
- Clamping Reliability: Properly matched nuts, pull studs, and locking devices directly affect holding force and safety.
- Coolant Efficiency: Sealing and coolant accessories help direct fluid flow and reduce leakage in through-coolant setups.
- Spindle Protection: Cleaning and maintenance accessories help preserve spindle accuracy and extend machine life.
Product Categories
Pull Studs (Retention Knobs)
Threaded fasteners that connect tool holders to the machine drawbar, available with or without coolant-through provision for various holder and machine standards including BT, CAT, HSK, and ISO.
Collet Nuts & Clamping Nuts
Precision-machined nuts used to clamp collets firmly within the tool holder. Available in standard and high-speed versions for ER, SK, and other collet systems.
Spanners
Purpose-designed wrenches used for safe, controlled tightening and loosening of collet nuts, coolant tubes, and other tool holder fittings. Available in types to suit ER, HSK, and other systems.
Sealing Disc
A small but important component that seals the tool holder assembly to support internal coolant flow, prevent leakage, and maintain coolant pressure in through-coolant machining setups.
HSK Coolant Tubes & Spanners
Coolant tubes for HSK holders that direct fluid through the holder to the cutting tool, accompanied by matching spanners for safe and precise installation and removal.
Tool Locking Device (Toolboy)
A workshop fixture used to securely hold tool holders during assembly, disassembly, and maintenance, ensuring safer setup and protecting the machine spindle from unnecessary strain.
Spindle Cleaner
A maintenance tool used to remove chips, dried coolant, and contamination from the spindle taper and contact face, helping preserve clamping accuracy, reduce run-out, and extend spindle life.
Selecting the Right Accessory
- Always confirm compatibility with the exact tool holder standard, taper size, and machine type before selecting pull studs or collet nuts.
- For coolant-through applications, ensure pull studs, sealing discs, and collet nuts are rated for the required coolant pressure.
- Use the correct spanner type for the specific nut profile to avoid damage and ensure safe, effective assembly.
- Select HSK coolant tube sizes that match the exact HSK interface, such as HSK-A50, HSK-A63, or HSK-A100.
- Choose a spindle cleaner that matches the machine spindle taper interface for correct fitment and effective cleaning.
Maintenance Best Practices
- Inspect pull studs, collet nuts, and sealing components regularly for wear, thread damage, or deformation.
- Clean the spindle taper before and after tool changes to maintain accuracy and protect the spindle contact surface.
- Replace worn or damaged accessories promptly to avoid clamping failures or inaccuracy during machining.
- Store accessories in a clean, protected environment to prevent corrosion, contamination, or surface damage.
- Follow manufacturer-recommended torque values when tightening collet nuts and pull studs to ensure correct clamping force.
Accessory Selection Guide
| Accessory | Primary Role | Key Selection Criteria |
|---|---|---|
| Pull Stud | Connects the tool holder to the machine drawbar for secure clamping in the spindle. | Holder standard (BT, CAT, HSK, ISO), drawbar thread specification, coolant-through requirement. |
| Collet Nut | Clamps the collet firmly in the holder to secure the cutting tool with uniform holding force. | Collet series (ER, SK), nut profile type (standard, high-speed), thread size compatibility. |
| Spanner | Tightens and loosens collet nuts, coolant tubes, and other threaded accessories safely. | Nut profile type, collet series, access space around the holder assembly. |
| Sealing Disc | Seals the tool holder assembly to support internal coolant flow and prevent leakage. | Holder and nut interface compatibility, coolant pressure rating. |
| HSK Coolant Tube | Directs coolant through the HSK holder to the cutting tool in through-coolant setups. | HSK interface size (HSK-A50, A63, A100), coolant pressure specification. |
| Tool Locking Device | Secures the tool holder during setup and maintenance to enable safe tightening and disassembly. | Holder taper or interface type, compatibility with the specific holder shape and size. |
| Spindle Cleaner | Removes debris, oil, and residue from the spindle taper and contact surface. | Spindle taper interface (BT30, BT40, BT50, CAT40, CAT50, HSK-A63, HSK-A100). |
