CAT40 and CAT50 pull studs to ANSI/ASME B5.50-1994, 45 degree head, UNC or metric thread. CAT40 and CAT50 are also written CT40 and CT50 — same V-flange taper, different house style. The U models carry the imperial thread, 5/8"-11UNC on CAT40 and 1"-8UNC on CAT50; the plain models are M16x2.0 and M24x3.0. A /T suffix opens a coolant hole straight through the middle, 7.1mm on CAT40 and 11.9mm on CAT50. The wrench flat is 3/4" on CAT40 and 1-1/4" on CAT50, so you know which socket to reach for. Retention knobs are wear parts, and a replacement set has to match the drawbar on head angle and thread, not just on taper number.
| Cart+ | SKU | Price | Quantity | Total | d1 | d2 | d3 | d5 | d6 | L1 | L2 | L3 | SW |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CAT40-A45° U | $7 | $0 | 18.8mm (0.74″) | 12.4mm (0.49″) | 23.8mm (0.94″) | 5/8″-11UNC | - | 38.1mm (1.5″) | 16.2mm (0.64″) | 11.2mm (0.44″) | 19.05mm (0.75″) | ||
CAT40-A45° U/T | $7 | $0 | 18.8mm (0.74″) | 12.4mm (0.49″) | 23.8mm (0.94″) | 5/8″-11UNC | 7.1mm (0.281″) | 38.1mm (1.5″) | 16.2mm (0.64″) | 11.2mm (0.44″) | 19.05mm (0.75″) | ||
CAT50-A45° U | $11 | $0 | 28.9mm (1.14″) | 20.8mm (0.82″) | 36.5mm (1.44″) | 1″-8UNC | - | 58.4mm (2.3″) | 25.4mm (1″) | 17.7mm (0.7″) | 31.75mm (1.25″) | ||
CAT50-A45° U/T | $11 | $0 | 28.9mm (1.14″) | 20.8mm (0.82″) | 36.5mm (1.44″) | 1″-8UNC | 11.9mm (0.468″) | 58.4mm (2.3″) | 25.4mm (1″) | 17.7mm (0.7″) | 31.75mm (1.25″) | ||
CAT40-A45° | $7 | $0 | 18.8mm (0.74″) | 12.4mm (0.49″) | 23.8mm (0.94″) | M16*2.0P | - | 38.1mm (1.5″) | 16.2mm (0.64″) | 11.2mm (0.44″) | 19.05mm (0.75″) | ||
CAT40-A45° /T | $7 | $0 | 18.8mm (0.74″) | 12.4mm (0.49″) | 23.8mm (0.94″) | M16*2.0P | 7.1mm (0.281″) | 38.1mm (1.5″) | 16.2mm (0.64″) | 11.2mm (0.44″) | 19.05mm (0.75″) | ||
CAT50-A45° | $11 | $0 | 28.9mm (1.14″) | 20.8mm (0.82″) | 36.5mm (1.44″) | M24*3.0P | - | 58.4mm (2.3″) | 25.4mm (1″) | 17.7mm (0.7″) | 31.75mm (1.25″) | ||
CAT50-A45° /T | $11 | $0 | 28.9mm (1.14″) | 20.8mm (0.82″) | 36.5mm (1.44″) | M24*3.0P | 11.9mm (0.468″) | 58.4mm (2.3″) | 25.4mm (1″) | 17.7mm (0.7″) | 31.75mm (1.25″) |
Made to ANSI/ASME B5.50-1994 for CAT (V-flange) holders
45 degree head angle on every model
U models take the UNC thread, plain models metric
/T models add a through-coolant hole
CAT40 takes a 3/4" socket, CAT50 a 1-1/4"
20CrMnTi alloy steel; head 55-58 HRC, thread and body 35±5 HRC
Machined to 0.005mm
Every dimension listed in both metric and inch
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