Product
A pull stud is inexpensive, easy to get wrong, and the only thing between your drawbar and a tool holder at full speed. Its form must match the drawbar gripper exactly.
Best for
Automatic tool change and standardising a mixed tool crib
You send
Holder taper, machine make and drawbar type, or a sample
You get back
Studs matched to the machine, not just the taper
How it starts
Drawbar standard confirmed before manufacture
The situation
The same taper can use different stud forms on different machines, which is how mixed cribs happen — and why they are dangerous.
What you get
Retention knobs matched to your holder taper and machine drawbar standard.
The machine interface, tool interface and working envelope are checked before manufacture, so pull studs arrive ready to run.
Supplied from range where a standard suits the job, made to order where it does not, or reproduced from your sample where the original is unavailable.
Locating and clamping features are ground and the dimensions governing runout and repeatability are inspected before dispatch.
Repeat orders and modifications are handled in Bengaluru rather than through an import cycle.
A pull stud screws into the back of a taper tool holder and is gripped by the machine drawbar. Its geometry must match the drawbar gripper exactly — a wrong or worn stud is an accuracy problem and a safety problem at the same time. CMTA supplies pull studs to the common standards and to sample.
BT, CAT and ISO tapers, with and without coolant-through, in the standard angles and thread sizes. Verified table to follow.
Confirm the drawbar standard on the machine, not just the holder taper. This is the single most common source of error in pull stud ordering, and a sample settles it immediately.
Alloy steel heat treated to the required core strength, ground on gripping and locating surfaces, with thread and profile inspected.
Before you enquire
The inputs that make a useful review, plus the related pages worth reading first.
FAQ
The questions engineers and buyers ask before sending a drawing. If yours is not here, ask it directly — you will get an engineer's answer, not a brochure.
Still have a question?
Talk to Anita M.N, Managing Partner, or send the drawing and let the review answer it.
Holder taper (BT30/40/50, CAT, ISO), Machine make and drawbar type, Stud standard or a sample, Coolant-through requirement, Quantity. If you are unsure of any of these, send a photograph of the current holder and the machine nameplate — that is usually enough for us to confirm the rest.
Yes. Variations in length, reach, interface, clamping or tool size are manufactured to order. Fully custom variants go through the custom tool holder process, with a drawing approved by you before manufacture.
Against three things: the machine interface, the tool interface and the working envelope. Where an existing item is being replaced, matching it to your sample or original part number is the most reliable route of all.
Yes. A drawing is manufactured to its stated tolerances; a sample is measured and reverse engineered into a drawing for your approval, and then manufactured.
Start a project
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