Pull studs by taper
CAT45 Pull Studs (Retention Knobs) – 45° Head, 3/4" Thread
CAT45 pull studs (retention knobs) screw into the back of a CAT45 tool holder (shank to ANSI/ASME B5.50, V-flange) so the machine's drawbar can pull it into the spindle. PTP makes 2 CAT45 pull studs: ANSI/ASME B5.50 with a 45° head, with a 3/4" thread, solid or with a coolant hole. Every stud is CNC ground, MPT tested (Magnetic Particle Testing) and proof tested at 2.5× the clamping force.
All 2 CAT45 pull studs
Grouped by standard, then by head angle. Each ordering code opens its own page with the drawing and every dimension (mm).
ANSI/ASME B5.50: 2 CAT45 pull studs
| Ordering code | Head angle (θ) | Thread (TH) | Knob Ø (A) | Overall length (D) | Coolant hole Ø (J) | Seal |
|---|---|---|---|---|---|---|
| PSAN4510P | 45° | 3/4" | 19.46 mm | 45.72 mm | – | – |
| PSAN4510CP | 45° | 3/4" | 19.46 mm | 45.72 mm | 9.53 mm | – |
How do I choose a CAT45 pull stud?
Taper. Check that the tool holder has a CAT45 shank to ANSI/ASME B5.50, V-flange. Its dimensions are on the CAT (ANSI/ASME B5.50) shank page.
Standard. Pick the pull stud type your machine's drawbar is built for: ANSI/ASME B5.50.
Head angle. ANSI/ASME B5.50 45°. Check that your drawbar gripper takes the head angle you order.
Thread. The CAT45 shank table gives 3/4"-10 UNC for the holder's pull-stud thread.
Coolant. For through-spindle coolant, order a stud with a coolant hole (J, Ø9.53 mm).
Questions about CAT45 pull studs
What thread does a CAT45 pull stud have?
All 2 CAT45 pull studs from PTP have a 3/4" thread. The CAT45 shank table gives 3/4"-10 UNC for the holder thread.
Which head angles are there for CAT45 pull studs?
45° (ANSI/ASME B5.50). Order the head angle your drawbar gripper takes.
Are there coolant-through CAT45 pull studs?
Yes: 1 of the 2 CAT45 codes have a coolant hole, Ø9.53 mm (J). The table lists the coolant hole of every code.