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  • ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder
  • ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder
  • ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder
  • ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder
  • ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder
  • ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder
  • ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder
  • ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder
ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder

ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder

  • • Pull stud for CNC tool holder cone
  • • CNC tool holder retention knob
  • • ISO 30 pull stud for HSD
  • • BT30 retaining studs
  • • CNC tool holder BT40 pull stud
  • • Pull studs for CNC routers
  • • HSD pull stud for ISO30 tool holders
  • • BT pull stud bolt
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CNC retention knob.jpg

ISO30 BT30 BT40 Pull Stud Bolt Retention Knob for CNC Machine Tool Holder

These are pull studs, also called retaining studs or retention knobs. They are screwed into the arbor on a CNC milling or drilling machine and used to connect the tool spindle and tool holder.
Pull studs for CNC routers.jpg

The pull stud bolt is the only part connecting the machining center and the tooling, preventing the arbor from coming out unless released intentionally. So it is a very important component and should be inspected regularly. Remember to fully tighten the retention knob. Failure to do so may result in the tool holder coming loose during operation.
BT30 retaining studs.jpg

CNC pull studs should be replaced once they show wear marks. We suggest replacing the CNC tool holder pull stud every 6/8 months. A worn knob is extremely detrimental to the TIR of a tool holder and replacing your retention knob is an easy and inexpensive way to improve the accuracy of the toolholder by up to 10X! and damaged pull studs will result in incorrect clamping of the tool holder in the spindle and can lead to serious damage to CNC machine spindle and workpiece and even injuries on persons.
cnc pull stud.jpg

There are several various styles and sizes of CNC retention knobs available to suit varieties of CNC machines. Most pull stud bolts are made to suit specific CNC machine brands. They often look similar and appear to be interchangeable, but in reality, they are not.
Please make sure that the Retention Knob you order is the correct one for your machine. Using the wrong pull stud can cause damage to your machine spindle, the tool holder, and may cause a safety hazard.
Please provide us with the following information when ordering retention knobs:
• Machining Center Taper Size (30, 40 taper, etc.) and flange type (ISO or BT)
• Brand and model of machining center
• Drawing and Part number of retention knob (if available)
ISO 30 pull stud for HSD.jpg

We offer a range of CNC tool holder Retention Knob for Columbo, Komo, HSD and other spindles.

Type

D

d1

d2

d3

L

L1

L2

T

KOMO   30-A12.5

17mm

13mm

9mm

12.5mm

44mm

23.4mm

18.2mm

M12

DAT   30-A

17mm

13mm

9mm

13mm

44mm

24mm

19mm

M12

Colombo   30 Ball

17mm

12.8mm

9mm

13mm

44mm

24mm

19mm

M12

HSD   ISO 30

17mm

12mm

8mm

13mm

44mm

23.9mm

M12

BT   30-45deg

16.5mm

11mm

7mm

12.5mm

43mm

23mm

M12

BT   40-45deg

23mm

15mm

10mm

17mm

60mm

35mm

28mm

M16

BT   50-45deg

38mm

23mm

17mm

25mm

85mm

45mm

35mm

M24

BT   30-60deg

16.5mm

11mm

7mm

12.5mm

43mm

23mm

M12

BT   40-60deg

23mm

15mm

10mm

17mm

60mm

35mm

28mm

M16

BT   50-60deg

38mm

23mm

17mm

25mm

85mm

45mm

35mm

M24

BT   30-90deg

16.5mm

11mm

7mm

12.5mm

43mm

23mm

8mm

M12

BT   40-90deg

23mm

15mm

10mm

17mm

60mm

35mm

28mm

M16


ISO20, ISO25, ISO30, CAT40, CAT50, JT40, JT50, JIS633940, MAZAK BT40, MAZAK BT50, JIS B6339 pull stud are available here.
CNC router pull studs.jpg

Retention knobs are manufactured with the best steel that ensures minimum wear and guarantees a tough inner core that resists the normal wear and tear caused by a CNC machine.
They have different diameters and lengths, please make sure that the pull stud you order is the correct one for your machine. If you need help do not hesitate to contact us.
retaining studs for CNC router.jpg

RicoCNC is a reliable resource specializing in CNC machine accessories. We ship worldwide!
CNC tool holder Pull Stud.jpg

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