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Lathe Tool Holder Bushings for CNC Lathes
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Increase the diameter of boring bars, drill bits, and other shank-style cutting tools to securely fit CNC lathe tool blocks. These bushings are machined and ground to precisely fit both tools and tool blocks for optimal performance. Made of hardened steel, they are durable and stand up to the strain of CNC machining. They’re Style C bushings, which means they have a slot in the side that clamps tools regardless of where tool-block set screws are located, making them compatible with all tool blocks.
Tolerance | Slot | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Shank Dia. | ID | Lg. | OD | ID | Tool Holder Bushing Style | Head OD | Head Thk. | Lg. | Wd. | Material | Fabrication | Hardness | Each | |||
3/4" OD | ||||||||||||||||
| 1/4" | 1/4" | 2" | -0.0005" to 0.0005" | 0.0005" to 0.0012" | C | 1" | 9/32" | 1 1/2" | 3/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N11 | 000000 | ||
| 3/8" | 3/8" | 2" | -0.0005" to 0.0005" | 0.0005" to 0.0012" | C | 1" | 9/32" | 1 1/2" | 3/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N12 | 00000 | ||
| 1/2" | 1/2" | 2" | -0.0005" to 0.0005" | 0.0005" to 0.0012" | C | 1" | 9/32" | 1 1/2" | 3/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N13 | 00000 | ||
1" OD | ||||||||||||||||
| 1/4" | 1/4" | 2 3/4" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 1 7/32" | 9/32" | 2 3/8" | 5/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N14 | 00000 | ||
| 5/16" | 5/16" | 2 3/4" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 1 7/32" | 9/32" | 2 3/8" | 5/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N15 | 00000 | ||
| 3/8" | 3/8" | 2 3/4" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 1 7/32" | 9/32" | 2 3/8" | 5/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N16 | 00000 | ||
| 1/2" | 1/2" | 2 3/4" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 1 7/32" | 9/32" | 2 3/8" | 5/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N17 | 00000 | ||
| 5/8" | 5/8" | 2 3/4" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 1 7/32" | 9/32" | 2 3/8" | 5/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N18 | 00000 | ||
| 3/4" | 3/4" | 2 3/4" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 1 7/32" | 9/32" | 2 3/8" | 5/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N19 | 00000 | ||
1 1/2" OD | ||||||||||||||||
| 3/8" | 3/8" | 3 3/8" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 1 3/4" | 9/32" | 3" | 7/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N21 | 00000 | ||
| 1/2" | 1/2" | 3 3/8" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 1 3/4" | 9/32" | 3" | 7/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N22 | 00000 | ||
| 5/8" | 5/8" | 3 3/8" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 1 3/4" | 9/32" | 3" | 7/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N23 | 00000 | ||
| 3/4" | 3/4" | 3 3/8" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 1 3/4" | 9/32" | 3" | 7/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N24 | 00000 | ||
| 1" | 1" | 3 3/8" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 1 3/4" | 9/32" | 3" | 7/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N25 | 00000 | ||
| 1 1/4" | 1 1/4" | 3 3/8" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 1 3/4" | 9/32" | 3" | 7/8" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N26 | 00000 | ||
2" OD | ||||||||||||||||
| 1/2" | 1/2" | 4" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 2 7/32" | 5/16" | 3 5/8" | 1" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N27 | 000000 | ||
| 5/8" | 5/8" | 4" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 2 7/32" | 5/16" | 3 5/8" | 1" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N28 | 000000 | ||
| 3/4" | 3/4" | 4" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 2 7/32" | 5/16" | 3 5/8" | 1" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N29 | 000000 | ||
| 1" | 1" | 4" | -0.0012" to -0.0005" | 0.0005" to 0.0012" | C | 2 7/32" | 5/16" | 3 5/8" | 1" | Black-Oxide Alloy Steel | Heat Treated | Rockwell C48 | 7600N31 | 000000 | ||
Tool Holder Cleaning Tools
For Tool Holder Shanks
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For Dia. | |||||||||
|---|---|---|---|---|---|---|---|---|---|
For Shank Taper No. | Min. | Max. | Taper Lg. | Overall Lg. | Material | Each | |||
BT, CAT, ISO, SK Tapers | |||||||||
| BT 30, CAT 30, ISO 30, SK 30 | 0.69" | 1 1/4" | 1.91" | 2 7/8" | Plastic | 9399N15 | 000000 | ||
| BT 40, CAT 40, ISO 40, SK 40 | 0.1" | 1 3/4" | 2.58" | 4" | Plastic | 9399N16 | 00000 | ||
HSK Tapers | |||||||||
| HSK 40A, HSK 40C, HSK 40E, HSK 50B, HSK 50D, HSK 50F | 1.1" | 1.18" | 0.79" | 5 5/8" | Plastic | 9399N17 | 00000 | ||
| HSK 50A, HSK 50C, HSK 50E, HSK 63B, HSK 63D, HSK 63F | 1.4" | 1 1/2" | 0.98" | 5 5/8" | Plastic | 9399N18 | 00000 | ||
| HSK 63A, HSK 63C, HSK 63E, HSK 80B, HSK 80D, HSK 80F | 1.76" | 1.89" | 1.3" | 6 1/8" | Plastic | 9399N19 | 00000 | ||
| HSK 80A, HSK 80C, HSK 80E, HSK 100B, HSK 100D, HSK 100F | 2.21" | 2.36" | 1.57" | 6 1/2" | Plastic | 9399N21 | 000000 | ||
| HSK 100A, HSK 100C, HSK 100E, HSK 125B, HSK 125D, HSK 125F | 2.76" | 2.95" | 1.97" | 6 1/2" | Plastic | 9399N22 | 000000 | ||
For Tool Holder Bores—Tapered
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For Dia. | |||||||||
|---|---|---|---|---|---|---|---|---|---|
For Collet Type | Min. | Max. | Taper Lg. | Overall Lg. | Material | Each | |||
| ER-11 | 0.32" | 0.43" | 0.79" | 1 1/8" | Plastic | 9399N23 | 000000 | ||
| ER-16 | 0.43" | 0.63" | 1.1" | 2 1/4" | Plastic | 9399N24 | 00000 | ||
| ER-20 | 0.55" | 0.79" | 1.26" | 2 3/8" | Plastic | 9399N25 | 00000 | ||
| ER-25 | 0.71" | 0.98" | 1.35" | 2 5/8" | Plastic | 9399N26 | 00000 | ||
| ER-32 | 0.94" | 1.26" | 1.53" | 2 7/8" | Plastic | 9399N27 | 00000 | ||
| ER-40 | 1.2" | 1.55" | 1.73" | 5 5/8" | Plastic | 9399N14 | 00000 | ||
| OZ16 | 0.79" | 0.92" | 1.77" | 5 3/4" | Plastic | 9399N11 | 00000 | ||
| OZ25 | 1.11" | 1.29" | 2.17" | 6 1/8" | Plastic | 9399N12 | 00000 | ||
| OZ32 | 1.43" | 1.64" | 2.56" | 6 1/2" | Plastic | 9399N13 | 00000 | ||
For Tool Holder Bores—Round
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For Bore Size | Overall Lg. | Material | Each | |||
|---|---|---|---|---|---|---|
| 3 mm, 1/8" | 2 7/8" | Plastic | 9399N28 | 000000 | ||
| 4 mm, 5/32" | 2 7/8" | Plastic | 9399N29 | 00000 | ||
| 5 mm, 13/64" | 3 1/2" | Plastic | 9399N31 | 00000 | ||
| 6 mm, 15/64" | 3 1/2" | Plastic | 9399N32 | 00000 | ||
| 6.3 mm, 1/4" | 3 1/2" | Plastic | 9399N33 | 00000 | ||
| 7 mm, 9/32" | 3 5/8" | Plastic | 9399N34 | 00000 | ||
| 8 mm, 5/16" | 3 5/8" | Plastic | 9399N35 | 00000 | ||
| 9 mm, 11/32" | 3 7/8" | Plastic | 9399N36 | 00000 | ||
| 9.5 mm, 3/8" | 3 7/8" | Plastic | 9399N37 | 00000 | ||
| 10 mm, 13/32" | 3 7/8" | Plastic | 9399N38 | 00000 | ||
| 11 mm, 7/16" | 4 1/4" | Plastic | 9399N39 | 00000 | ||
| 12 mm, 15/32" | 4 1/2" | Plastic | 9399N41 | 00000 | ||
| 12.7 mm, 1/2" | 4 1/2" | Plastic | 9399N42 | 00000 | ||
| 13 mm, 33/64" | 6 5/8" | Plastic | 9399N43 | 00000 | ||
| 14 mm, 9/16" | 6 5/8" | Plastic | 9399N44 | 00000 | ||
| 15 mm, 19/32" | 6 5/8" | Plastic | 9399N45 | 00000 | ||
| 16 mm, 5/8" | 6 7/8" | Plastic | 9399N46 | 00000 | ||
| 18 mm, 23/32" | 6 7/8" | Plastic | 9399N47 | 00000 | ||
| 19 mm, 3/4" | 6 7/8" | Plastic | 9399N48 | 00000 | ||
| 20 mm, 13/16" | 6 7/8" | Plastic | 9399N49 | 00000 | ||
| 22 mm, 7/8" | 7 1/4" | Plastic | 9399N51 | 00000 | ||
| 24 mm, 15/16" | 7 1/2" | Plastic | 9399N52 | 00000 | ||
| 25 mm, 1" | 7 3/8" | Plastic | 9399N53 | 00000 | ||
| 28 mm, 1 1/8" | 7 7/8" | Plastic | 9399N54 | 00000 | ||
| 31 mm, 1 7/32" | 8 1/8" | Plastic | 9399N55 | 00000 | ||
| 32 mm, 1 1/4" | 8 1/2" | Plastic | 9399N56 | 00000 | ||
| 40 mm, 1 9/16" | 9" | Plastic | 9399N57 | 00000 | ||
| 42 mm, 1 21/32" | 9 1/8" | Plastic | 9399N58 | 00000 | ||
Square- and Round-Shank Tool Holders for Quick-Change Lathe Tool Posts
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Shown with Lathe Tool (Sold Separately) |
A V-groove enables these holders to grip round-shank as well as square-shank tools. A shoulder screw allows for quick and accurate adjustment of the tool height without the need for shimming. Posts and holders (sold separately) are interchangeable with systems from Aloris, Dorian, and Armstrong. Use with lathe tools (sold separately) that have dimensions that correspond to the holder’s capacity.
Lathe Post Tool Holders | Replacement Shoulder Screws | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Max. Shank | ||||||||||||
For Tool Post Series | For Lathe Swing | Wd. | Ht. | Dia. | Centerline Ht. | Overall Ht. | Each | Each | ||||
| AXA | 0" to 10" | 1/2" | 1/2" | 1/2" | 15/16" | 1 1/2" | 31805A33 | 000000 | 31805A405 | 000000 | ||
| BXA | 12" to 15" | 5/8" | 5/8" | 5/8" | 1 1/8" | 1 3/4" | 31805A34 | 00000 | 31805A412 | 00000 | ||
| CXA | 13" to 18" | 3/4" | 3/4" | 3/4" | 1 7/16" | 2 1/8" | 31805A35 | 000000 | 31805A435 | 00000 | ||
| CA | 14" to 20" | 1" | 1" | 13/16" | 1 11/16" | 2 1/2" | 31805A36 | 000000 | 31805A444 | 00000 | ||
Strong-Hold Round-Shank Tool Holders for Quick-Change Lathe Tool Posts
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Shown with Lathe Tool (Sold Separately) |
Four flat head screws lock down round-shank tools in a precision-ground bore for increased rigidity over other round-shank tool holders. A shoulder screw allows for quick and accurate adjustment of the tool height without the need for shimming. Posts and holders (sold separately) are interchangeable with systems from Aloris, Dorian, and Armstrong. Use with lathe tools (sold separately) that have a shank diameter that corresponds to the holder’s capacity.
Lathe Post Tool Holders | Replacement Shoulder Screws | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
For Tool Post Series | For Lathe Swing | For Max. Shank Dia. | Centerline Ht. | Overall Ht. | Each | Each | ||||
| AXA | 0" to 10" | 3/4" | 3/4" | 1 1/2" | 31805A19 | 0000000 | 31805A405 | 000000 | ||
| BXA | 12" to 15" | 1" | 1" | 2" | 31805A21 | 000000 | 31805A412 | 00000 | ||
| CXA | 13" to 18" | 1" | 1" | 2" | 31805A22 | 000000 | 31805A435 | 00000 | ||
| CA | 14" to 20" | 1 1/4" | 1 1/4" | 2 1/2" | 31805A23 | 000000 | 31805A444 | 00000 | ||
Quick-Change Lathe Tool Posts
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Position and secure tools on manual and CNC lathes. Two slide-in dovetail mounts allow you to quickly change from one tool holder to another. The dovetail mounts are set 90° apart so you can mount tool holders on either side. A wedge-type locking system eliminates vibration and ensures repeated accuracy within millionths of an inch. Posts and holders (sold separately) are interchangeable with systems from Aloris, Dorian, and Armstrong.
Select the tool post series that matches your lathe’s swing and center height. Lathe swing is the maximum workpiece diameter that can be turned on the lathe. To find your lathe’s swing, measure the distance between the centerline of the lathe and the lathe bed and multiply by two. To find your lathe’s center height, measure the distance from the centerline of the lathe to the top of the compound. Choose the tool post series with an optimal center height that is closest to your lathe’s center height.
With Blank T-Nut
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Tool posts with blank T-nuts come with a T-nut that must be machined to fit your lathe’s T-slot.
For Lathe | Body | T-Nut Overall | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Tool Post Series | Swing | Ctr. Ht. | Optimal Center Ht. | Wd. | Ht. | Overall Ht. | Post Dia. | Lg. | Wd. | Ht. | Each | ||
| AXA | 0" to 10" | 15/16" to 1 1/4" | 1 3/32" | 2 1/2" | 2 1/4" | 3 7/8" | 9/16" | 4 3/8" | 2 1/4" | 1/2" | 31805A11 | 0000000 | |
| BXA | 12" to 15" | 1 1/8" to 1 3/4" | 1 7/16" | 3" | 2 3/4" | 4 5/8" | 5/8" | 5 3/8" | 2 3/4" | 5/8" | 31805A12 | 000000 | |
| CXA | 13" to 18" | 1 7/16" to 2" | 1 23/32" | 3 1/2" | 3" | 5 1/8" | 3/4" | 6 1/8" | 3" | 3/4" | 31805A13 | 000000 | |
| CA | 14" to 20" | 1 11/16" to 2 5/8" | 2 5/32" | 4" | 3 5/8" | 6 1/4" | 7/8" | 7 3/8" | 3 1/2" | 7/8" | 31805A14 | 000000 | |
With Made-To-Order T-Nut
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T-Slot Dimensions |
Tool posts with made-to-order T-nuts come with a T-nut that has been machined to fit your lathe’s T-slot.
To order: Provide the base width, base height, slot width, and overall height of your lathe’s T-slot.
For Lathe | Body | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Tool Post Series | Swing | Ctr. Ht. | Optimal Center Ht. | Wd. | Ht. | Overall Ht. | Post Dia. | Choose a T-Slot Base Width | Choose a T-Slot Base Height | Choose a T-Slot Width | Choose a T-Slot Overall Height | Each | ||
| AXA | 0" to 10" | 15/16" to 1 1/4" | 1 3/32" | 2 1/2" | 2 1/4" | 3 7/8" | 9/16" | 1/16" to 1 1/2" | 3/16" to 3/8" | 5/8" to 1" | 1/16" to 1/2" | 31805A914 | 0000000 | |
| BXA | 12" to 15" | 1 1/8" to 1 3/4" | 1 7/16" | 3" | 2 3/4" | 4 5/8" | 5/8" | 1/16" to 2 1/4" | 3/16" to 3/8" | 11/16" to 1 5/8" | 1/16" to 5/8" | 31805A915 | 000000 | |
| CXA | 13" to 18" | 1 7/16" to 2" | 1 23/32" | 3 1/2" | 3" | 5 1/8" | 3/4" | 1/16" to 2 1/2" | 1/4" to 1/2" | 13/16" to 1 9/16" | 1/16" to 3/4" | 31805A919 | 000000 | |
| CA | 14" to 20" | 1 11/16" to 2 5/8" | 2 5/32" | 4" | 3 5/8" | 6 1/4" | 7/8" | 1/16" to 2 1/2" | 1/4" to 1/2" | 15/16" to 1 1/2" | 1/16" to 7/8" | 31805A944 | 00000000 | |
Boring Milling Machine Tool Holders
Holder with Round Shank
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Adjustment Dial |
Shank | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
For Tool Bit Shank Dia. | Lg. | Dia. | Head Dia. | Offset Travel | Vert. Hole Spacing | Overall Lg. | Material | Features | Each | ||
| 3/8" | 2 5/8" | 3/4" | 2" | 0.75" | 0.625" | 5 1/16" | Steel | Adjustment Dial | 6380N101 | 0000000 | |
| 1/2" | 2 5/8" | 3/4" | 2 1/2" | 0.75" | 0.75" | 5 13/16" | Steel | Adjustment Dial | 6380N102 | 000000 | |
| 5/8" | 2 5/8" | 3/4" | 2 1/2" | 0.75" | 0.75" | 5 13/16" | Steel | Adjustment Dial | 6380N103 | 000000 | |
| 3/4" | 2 5/8" | 1" | 3" | 1.25" | 0.938" | 6 1/8" | Steel | Adjustment Dial | 6380N104 | 000000 | |
Holder with R8 Taper Shank
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Adjustment Dial |
For Tool Bit Shank Dia. | Shank Lg. | Head Dia. | Offset Travel | Vert. Hole Spacing | Overall Lg. | Material | Features | Each | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 3/8" | 4" | 2" | 0.75" | 0.625" | 6 7/16" | Steel | Adjustment Dial | 6380N105 | 0000000 | |
| 1/2" | 4" | 2 1/2" | 0.75" | 0.75" | 7 3/16" | Steel | Adjustment Dial | 6380N106 | 000000 | |
| 5/8" | 4" | 2 1/2" | 0.75" | 0.75" | 7 3/16" | Steel | Adjustment Dial | 6380N107 | 000000 | |
| 3/4" | 4" | 3" | 1.25" | 0.938" | 7 1/2" | Steel | Adjustment Dial | 6380N108 | 000000 |
Holder for Interchangeable Shanks
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Adjustment Dial |
Holders for interchangeable shanks work with various hole sizes and machines. Add a compatible body, these holders do not include one.
For Tool Bit Shank Dia. | Thread Size | Head Dia. | Offset Travel | Vert. Hole Spacing | Overall Lg. | Material | Features | Each | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 3/8" | 7/8"-20 | 2" | 0.75" | 0.625" | 2 7/16" | Steel | Adjustment Dial | 6380N109 | 0000000 | |
| 1/2" | 7/8"-20 | 2 1/2" | 0.75" | 0.75" | 3 3/16" | Steel | Adjustment Dial | 6380N11 | 000000 | |
| 5/8" | 7/8"-20 | 2 1/2" | 0.75" | 0.75" | 3 3/16" | Steel | Adjustment Dial | 6380N111 | 000000 | |
| 3/4" | 1 1/2"-18 | 3" | 1.25" | 0.313" | 3 1/2" | Steel | Adjustment Dial | 6380N112 | 000000 |
 |  |  |  |
Round Shank | R8 Taper Shank | Morse Taper Shank | Machine Taper Shank |
Shank | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Thread Size | Machine Taper No. | Lg. | Dia. | Material | Includes | Each | |||
Round Shank | |||||||||
| 7/8"-20 | — | 2 5/8" | 1/2" | Steel | — | 6380N12 | 000000 | ||
| 7/8"-20 | — | 2 5/8" | 3/4" | Steel | — | 6380N123 | 00000 | ||
| 1 1/2"-18 | — | 2 5/8" | 1" | Steel | — | 6380N125 | 00000 | ||
R8 Taper Shank | |||||||||
| 7/8"-20 | — | 4" | — | Steel | — | 6380N127 | 00000 | ||
| 1 1/2"-18 | — | 4" | — | Steel | — | 6380N129 | 00000 | ||
Morse Taper Shank | |||||||||
| 7/8"-20 | Morse 3 | 3 7/8" | — | Steel | Tang | 6380N114 | 00000 | ||
| 1 1/2"-18 | Morse 4 | 4 7/8" | — | Steel | Tang | 6380N117 | 000000 | ||
Machine Taper Shank | |||||||||
| 7/8"-20 | NMTB 40 | 3 3/4" | — | Steel | Draw Bar, Drive Flange | 6380N119 | 000000 | ||
| 1 1/2"-18 | NMTB 40 | 3 3/4" | — | Steel | Draw Bar, Drive Flange | 6380N122 | 000000 | ||
