ISO30 Pull Stud Retention Knob For CNC Tool Holder Replacement Parts

Need to replace a worn pull stud on an ISO30 tool holder without buying a new holder? This retention knob threads into the tail of the ISO30 holder and is gripped by the spindle drawbar, so the holder is pulled onto the taper and stays there. It is machined from high-grade steel for high strength, high precision and corrosion resistance, and it is sold as a replacement part for ISO30 holders only. One model, one SKU, origin China. Price is quoted per order.

A shop that runs automatic tool change meets the same three things: a knob worn at the neck so the drawbar no longer grips it; a replacement ordered from a photo that does not match the holder on the machine; and a spindle standing still while a part worth a fraction of the downtime sits on back order. The ISO30 Pull Stud Retention Knob takes all three out of the day.

The part is a retention knob, the pull stud that threads into the tail of an ISO30 tool holder and is pulled by the drawbar of the machining centre. The body is high-grade steel, so the clamping load runs through the steel knob and not through the holder. Three characteristics are stated for this item: high strength, high precision and corrosion resistance.

Precision is why the fit matters: thread, flange and neck are machined so the holder locates in the spindle the same way each time it is loaded, which keeps a tool cutting where the program put it. A corrosion-resistant surface treatment holds off rust from coolant, oil and swarf between shifts, and it does not change the fit of the knob in the holder.

It suits ISO30 tool holders on CNC machining centres, vertical and horizontal, and is listed for precision milling and high-speed machining. One model, ISO30; origin China; price quoted per order.

What this spare is, in terms you can check against your own machine:

• ISO30 fit only — the knob is made for ISO30 holders, so it is matched to the taper the spindle already runs rather than to a BT30 or HSK spindle.
• High-grade steel body — the pull stud is machined from high-grade steel, so the clamping load is carried by the steel neck instead of the holder tail.
• High precision machining — thread, flange and neck are cut to a stated tolerance, so the holder goes into the spindle the same way every tool change.
• Corrosion-resistant treatment — a surface finish holds off rust from coolant, oil and swarf, where a bare steel neck goes first.
• Flange and neck for the drawbar — the form spreads clamping force over a defined face, so one thread is not taking the whole pull.
• High strength, repeated cycles — the part is specified for repeated load, which is what an automatic tool change does all shift.
• Replacement, not conversion — it is an accessory for ISO30 holders, so a worn knob is swapped and holder and spindle stay as they are.
• One model, one SKU — ISO30 is the only size listed, so a re-order is a single line.
• Origin China — origin is stated as China on the specification, so the route is on paper before the order.

The usual choice is between pulling a holder off the machine while a worn knob is re-ordered, and running a pull stud that the drawbar no longer grips properly. Buying the knob as a defined ISO30 replacement part is the third route.

• A tool change that completes. The fit is ISO30 and nothing else, so the knob is never asked to hold a holder it was not made for.
• The clamp goes where it should. A high-grade steel body takes the drawbar load at the neck, so the holder is pulled onto the taper instead of being hammered into it.
• The same seat on every load. Precision machining on thread, flange and neck means the holder locates repeatably, which is what a tight tolerance in the program depends on.
• Rust stays off the neck. The corrosion-resistant treatment is there for coolant and cutting oil, so a spare does not seize in the holder tail between jobs.
• A re-order without a guess. One model, ISO30, one type, replacement parts, so the next order needs a part name and not a measurement.
• Downtime measured in one part. The knob is the item that wears at the drawbar interface, so keeping one on the shelf removes the back-order wait from a spindle stop.

Yes, if the holder is ISO30. The knob is made for ISO30 tool holders only, so check the marking on the holder tail before ordering — a BT30 or HSK holder takes a different pull stud.

The knob on its own. It is listed as a replacement part and accessory for ISO30 tool holders, so the holder, collet and nut are not part of this item.

High-grade steel, with a corrosion-resistant surface treatment. The steel carries the clamping load; the treatment is there for coolant and oil.

No, that is what the treatment is for. The corrosion-resistant finish protects the steel against rust from coolant, cutting oil and swarf between shifts.

No. The fit is ISO30 only — the thread, flange and neck are machined for the ISO30 holder tail and the drawbar that grips it.

CNC machining centres, vertical and horizontal, plus precision milling and high-speed machining where the holder has to stay put in the spindle.

No, ISO30 is the only model listed. One SKU covers the item, so a re-order is a single line and there is no variant to pick.

Ask for a quote. Price is given per order rather than published, so quantity and destination go into the same reply.