Turning Carbide Insert Holders
Secure carbide inserts inside these holders for stable turning. They’re also known as indexable insert holders. Select a holder that’s compatible with your insert by matching the insert style and inscribed circle diameter (IC). Right-hand holders move from right to left toward the lathe chuck, left-hand holders move from left to right away from the lathe chuck, and neutral holders can cut in either direction.
M-code holders secure inserts with both a top clamp and a pin lock, so they’re often used for interrupted or semi-interrupted cuts to keep inserts stable despite vibration. They’re the most commonly used holders with negative-rake inserts.
D-code holders require just a quick motion to remove inserts from their wedge clamp. However, they hold inserts less securely than M-code holders.
Holders with an offset shank are good for reaching into tight corners and when working close to the chuck.
Holders | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Insert | Shank | Replacement Clamps | Replacement Clamp Screws | Replacement Lock Pin Screws | Replacement Seats | |||||||||
| Inscribed Circle Dia. (IC) | Thick. | Wd. | Ht. | O'all Lg. | Each | Each | Each | Each | Each | |||||
For Along-the-Length Turning, Chamfering, Facing | ||||||||||||||
Right Hand | ||||||||||||||
| 1/2" | 3/16" | 3/4" | 3/4" | 4 1/2" | 3288A741 | 000000 | 3288A937 | 000000 | 3288A946 | 00000 | 3288A924 | 000000 | 3288A987 | 000000 |
| 1/2" | 3/16" | 1" | 1" | 6" | 3288A742 | 00000 | 3288A937 | 00000 | 3288A946 | 0000 | 3288A924 | 00000 | 3288A987 | 00000 |
| 5/8" | 1/4" | 1" | 1" | 6" | 3288A749 | 000000 | 3288A981 | 00000 | 3288A947 | 0000 | 3288A997 | 00000 | 3288A988 | 00000 |
| 3/4" | 1/4" | 1" | 1" | 6" | 8924N119 | 000000 | 3288A981 | 00000 | 3288A947 | 0000 | 3288A173 | 00000 | 3288A167 | 00000 |
Left Hand | ||||||||||||||
| 1/2" | 3/16" | 3/4" | 3/4" | 4 1/2" | 3288A745 | 00000 | 3288A937 | 00000 | 3288A946 | 0000 | 3288A924 | 00000 | 3288A987 | 00000 |
| 1/2" | 3/16" | 1" | 1" | 6" | 3288A746 | 00000 | 3288A937 | 00000 | 3288A946 | 0000 | 3288A924 | 00000 | 3288A987 | 00000 |
| 5/8" | 1/4" | 1" | 1" | 6" | 3288A748 | 000000 | 3288A981 | 00000 | 3288A947 | 0000 | 3288A997 | 00000 | 3288A988 | 00000 |
| 3/4" | 1/4" | 1" | 1" | 6" | 8924N121 | 000000 | 3288A981 | 00000 | 3288A947 | 0000 | 3288A173 | 00000 | 3288A167 | 00000 |
Holders | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Insert | Shank | Replacement Clamps | Replacement Clamp Screws | Replacement Lock Pin Screws | Replacement Seats | |||||||||
| Inscribed Circle Dia. (IC) | Thick. | Wd. | Ht. | O'all Lg. | Each | Each | Each | Each | Each | |||||
For Along-the-Length Turning, Chamfering, Facing | ||||||||||||||
Right Hand | ||||||||||||||
| 5/8" | 1/4" | 1" | 1" | 6" | 8924N129 | 0000000 | 3288A982 | 000000 | 3288A947 | 00000 | 3288A997 | 000000 | 3288A988 | 000000 |
Left Hand | ||||||||||||||
| 5/8" | 1/4" | 1" | 1" | 6" | 8924N131 | 000000 | 3288A982 | 00000 | 3288A947 | 0000 | 3288A997 | 00000 | 3288A988 | 00000 |
Holders | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Insert | Shank | Replacement Clamps | Replacement Seats | Replacement Seat Screws | Replacement Slotted Pins | |||||||||
| Inscribed Circle Dia. (IC) | Thick. | Wd. | Ht. | O'all Lg. | Each | Each | Each | Each | Each | |||||
For Along-the-Length Turning, Facing | ||||||||||||||
Right Hand | ||||||||||||||
| 1/2" | 3/16" | 3/4" | 3/4" | 4 1/2" | 3288A012 | 000000 | 3288A504 | 000000 | 3288A591 | 000000 | 3288A407 | 000000 | 3288A547 | 00000 |
| 1/2" | 3/16" | 1" | 1" | 6" | 3288A082 | 00000 | 3288A504 | 00000 | 3288A592 | 00000 | 3288A407 | 00000 | 3288A547 | 000 |
Left Hand | ||||||||||||||
| 1/2" | 3/16" | 3/4" | 3/4" | 4 1/2" | 3288A017 | 00000 | 3288A504 | 00000 | 3288A591 | 00000 | 3288A407 | 00000 | 3288A547 | 000 |
| 1/2" | 3/16" | 1" | 1" | 6" | 3288A097 | 00000 | 3288A504 | 00000 | 3288A592 | 00000 | 3288A407 | 00000 | 3288A547 | 000 |
PCD (Polycrystalline Diamond) Inserts for Non-Metals
Made for cutting fiberglass, carbide, and ceramic, these inserts have a PCD (polycrystalline diamond) edge that’s extremely hard and resistant to heat and wear. You can also use them on nonferrous metals like aluminum, brass, or bronze. They’re designed for continuous cutting conditions, which means the insert stays in constant contact with the workpiece. Use these inserts at the end of your turning process to finish workpieces—they remove minimal material and leave a smooth surface finish. They come factory sealed from the manufacturer for maximum traceability. Install them into a matching holder.
Inserts with a larger tip radius remove more material with each pass but cut less precisely than smaller inserts. Select the insert with the largest tip radius that still turns your workpiece to the desired shape.
Inserts with a shorter cutting edge are best for precision cuts and low-volume applications; a longer edge can handle deep cuts and heavy machining.
Negative-rake inserts are the first choice for most turning applications. With strong cutting edges on two faces, they last longer than comparable positive-rake inserts. When all the edges on one face are worn, flip the insert over.
Insert Code | Tip Radius | Inscribed Circle Dia. (IC) | Thick. | Cutting Edge Lg. | Rake Type | For Cutting Operation | Finish | Each | |
For Continuous Cutting Conditions | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| CNMM-430.5 | 0.008" | 1/2" | 3/16" | 0.11" | Negative | Finishing | Uncoated | 8276N11 | 000000 |
| CNMM-430.5 | 0.008" | 1/2" | 3/16" | 0.23" | Negative | Finishing | Uncoated | 8276N26 | 000000 |
| CNMM-431 | 1/64" | 1/2" | 3/16" | 0.11" | Negative | Finishing | Uncoated | 8276N12 | 00000 |
| CNMM-431 | 1/64" | 1/2" | 3/16" | 0.23" | Negative | Finishing | Uncoated | 8276N27 | 000000 |
| CNMM-432 | 1/32" | 1/2" | 3/16" | 0.11" | Negative | Finishing | Uncoated | 8276N13 | 00000 |
| CNMM-432 | 1/32" | 1/2" | 3/16" | 0.22" | Negative | Finishing | Uncoated | 8276N28 | 000000 |
| CNMM-433 | 3/64" | 1/2" | 3/16" | 0.22" | Negative | Finishing | Uncoated | 8276N29 | 000000 |
Boring Carbide Insert Holders
Pair these holders with a carbide insert (not included) to enlarge existing holes to precise diameters. They’re made to ANSI standards.
Face your lathe and use the direction the spindle rotates to choose an insert holder. Use right-hand holders when the spindle of your lathe rotates counterclockwise.
Holders with a coolant hole deliver coolant through the holder from your lathe onto the workpiece to minimize heat.
Holders | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Insert | Cutting Edge Angle | Replacement Torx Screws | Replacement Torx Keys | Replacement Clamps | Replacement Clamp Screws | Replacement Hex Keys | Replacement Nozzles | Replacement Springs | Replacement Seats | ||||||||||||||||||
| Shank Dia. | Min. Hole Dia. | Max. Hole Dp. | O'all Lg. | Inscribed Circle Dia. (IC) | Thick. | Material | Side | End | Features | Each | Each | Each | Each | Each | Each | Each | Each | Each | |||||||||
For Boring, Facing | |||||||||||||||||||||||||||
Right Hand | |||||||||||||||||||||||||||
| 1" | 1 1/4" | 3" | 12" | 1/2" | 3/16" | Steel | -5° | 5° | Coolant Hole | 1475N129 | 0000000 | 9971N132 | 00000 | 9971N135 | 00000 | 9971N128 | 000000 | 9971N129 | 00000 | 9971N134 | 00000 | 9971N133 | 000000 | 9971N131 | 00000 | 9971N138 | 000000 |
| 1 1/4" | 1 1/2" | 3 3/4" | 12" | 1/2" | 3/16" | Steel | -5° | 5° | Coolant Hole | 1475N131 | 000000 | 9971N132 | 0000 | 9971N135 | 0000 | 9971N128 | 00000 | 9971N129 | 0000 | 9971N134 | 0000 | 9971N133 | 00000 | 9971N131 | 0000 | 9971N138 | 00000 |
| 1 1/2" | 1 3/4" | 5 1/4" | 12" | 1/2" | 3/16" | Steel | -5° | 5° | Coolant Hole | 1475N132 | 000000 | 9971N132 | 0000 | 9971N135 | 0000 | 9971N128 | 00000 | 9971N129 | 0000 | 9971N134 | 0000 | 9971N133 | 00000 | 9971N131 | 0000 | 9971N138 | 00000 |