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16C Lathe Collets
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Insert into a 16C collet chuck or holder to tightly grip round workpieces. They provide a stronger hold on small workpieces than a standard lathe chuck. These collets have both external and internal threads.
Collet Size | Total Indicated Runout (TIR) Accuracy | Workpiece Dia. Tolerance | Body Dia. | Overall Lg. | Internal Thread Size | External Thread Size | Material | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
Round Face | |||||||||||
| 1/4" | 0.0008" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A111 | 000000 | ||
| 5/16" | 0.0008" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A112 | 00000 | ||
| 3/8" | 0.0008" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A113 | 00000 | ||
| 7/16" | 0.0011" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A114 | 00000 | ||
| 1/2" | 0.0011" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A115 | 00000 | ||
| 9/16" | 0.0011" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A116 | 00000 | ||
| 5/8" | 0.0011" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A117 | 00000 | ||
| 11/16" | 0.0011" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A118 | 00000 | ||
| 3/4" | 0.0015" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A119 | 00000 | ||
| 13/16" | 0.0015" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A121 | 00000 | ||
| 7/8" | 0.0015" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A122 | 00000 | ||
| 1" | 0.0015" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A123 | 00000 | ||
| 1 1/16" | 0.0015" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A124 | 00000 | ||
| 1 1/8" | 0.0015" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A125 | 00000 | ||
| 1 3/16" | 0.0015" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A126 | 00000 | ||
| 1 1/4" | 0.0015" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A127 | 00000 | ||
| 1 3/8" | 0.0015" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A128 | 00000 | ||
| 1 1/2" | 0.0015" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A129 | 00000 | ||
| 1 5/8" | 0.0015" | -0.004" to 0" | 1.89" | 4.31" | 1 11/16"-20 | M47.5 × 1.75 mm | Steel | 3274A131 | 00000 | ||
Machine-Your-Own 16C Lathe Collets
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Insert into a 16C collet chuck or holder to tightly grip workpieces. Also known as emergency collets, their machinable face allows you to bore an opening to exactly the size and shape you need. All have external and internal threads.
Max. Bore Dia. | Body Dia. | Overall Lg. | Face Pilot Hole Dia. | Internal Thread Size | External Thread Size | Material | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|
Machine-Your-Own Face | ||||||||||
| 1 5/8" | 1.89" | 4 1/4" | 1/16" | 1 11/16"-20 | M47.5 × 1.75 mm | Hardened Steel | 3274A151 | 0000000 | ||
Collet Fixtures
Square Drive Actuator
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Square-drive fixtures are designed for precise, repeatable workholding with consistent clamping force. They keep the collet stationary while their sleeve clamps. Made of steel, these fixtures are stronger and more wear resistant than cast iron fixtures, and they can hold up to higher clamping forces. They’re precision machined for accuracy. Use the included socket wrench to clamp and unclamp your workpiece or use a calibrated torque wrench to fine-tune the clamping force.
Mounting Holes | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Collet Type | For Max. Workpiece Dia. | Through-Hole Dia. | Dia. | Ht. | Material | No. of | Dia. | Bolt Circle Dia. | Mounting Position | Power Source | Includes | Each | ||
| 16C | 1 5/8" | 1 13/16" | 5" | 4 1/2" | Black-Oxide Steel | 6 | 3/8" | 4 1/8" | Horizontal, Vertical | Manual | Socket Wrench | 3174A32 | 000000000 | |
High-Density Air/Hydraulic-Operated Collet Fixtures
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Four Fixtures (Each Sold Separately) |
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Fixed Length |
Push a button to clamp or release multiple workpieces on your milling machine or drill press. To create a high-density setup, mount these fixtures and join them together using two connector bushings (sold separately) for each fixture you want to add. These fixtures have a through hole for clamping long workpieces.
Air or hydraulic pressure opens and closes the collets (not included). A good choice for heavy machining, these fixtures provide a tighter hold than you can achieve with manual power. You can operate multiple fixtures with a single valve (not included) and two hoses—one for supply and one for return. All are double acting, so they need air or hydraulic pressure both to open and close. This means that the workpiece stays locked in place even if you lose pressure. Clamping force depends on the air or hydraulic pressure of your system.
Top-Locking Screw—Fixtures with a top-locking screw allow for direct access to make adjustments without disassembling your setup.
Fixed Length—Fixed-length fixtures, also known as dead-length fixtures, keep the collet stationary while they clamp onto a workpiece. Use them to precisely machine holes, slots, and contours exactly where you need them. Since these fixtures position workpieces consistently, they’re often used for high-volume production runs. You can also rotate them on an indexer or rotary table without losing your reference point.
Collet Fixtures | Connectors | |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Max. Pressure, psi | Max. Clamping Force, psi | Mounting Holes | Port | |||||||||||||||||||||
For Collet Type | For No. of Collets | For Max. Workpiece Dia. | Through-Hole Dia. | Lg. | Wd. | Ht. | Air | Hydraulic | Air-Powered | Hydraulic-Powered | Material | No. of | Thread Size | No. of Ports | Pipe Size | Thread Type | Thread Gender | Includes | Each | Each | ||||
Collet Fixtures with Top-Locking Screw | ||||||||||||||||||||||||
Fixed Length | ||||||||||||||||||||||||
| 16C | 1 | 1 5/8" | 1 7/8" | 4" | 4" | 4 1/4" | 250 | 2,000 | 1,450 | 11,600 | Aluminum | 4 | 3/8"-16 | 2 | 1/4 | NPT | Female | Collet Wrench | 3115N17 | 0000000 | 3115N12 | 000000 | ||
Lathe Collet Wrenches
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Aluminum Handle | External Hex Drive |
Install and remove lathe collets from collet chucks and fixtures with these specialized wrenches. Fins on the wrench slide into slots on the collet. Choose the wrench that works with your lathe collet type.
Aluminum Handle—Knurled aluminum surface provides a better hand grip than plastic handles. When necessary, a cross-drilled hole allows for extra leverage. Just insert a screwdriver or similar rigid tool when more torque is needed.
External Hex Drive—Tighten and loosen collets by hand in tight spaces. You can also use a wrench or socket for more torque.
Material | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
No. of Fins | Handle Material | Drive Style | Head | Fin | Head Dia. | Overall Lg. | Each | |||
For 16C or 3J Collets | ||||||||||
| 3 | Aluminum | — | Black-Oxide Steel | Black-Oxide Steel | 1 3/4" | 4 1/4" | 3197A11 | 000000 | ||
| 3 | — | External Hex | Steel | Steel | 2 1/8" | 1 1/8" | 3197A16 | 00000 | ||
| 4 | Aluminum | — | Black-Oxide Steel | Black-Oxide Steel | 1 3/4" | 4 1/4" | 3197A12 | 00000 | ||
| 4 | — | External Hex | Steel | Steel | 2 1/8" | 1 1/8" | 3197A17 | 00000 | ||
