For Holding For Holding |
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Head Diameter Head Diameter |
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Head Length Head Length |
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For End Mill Shank Diameter For End Mill Shank Diameter |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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For Drill Chuck Jacobs Taper Diameter For Drill Chuck JacobsTaper Diameter |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Arbors for Face Milling Cutters
Mount large-diameter milling cutters securely in Bridgeport and similar milling machines that have an R8 taper spindle.
Shank Thread | Head | Nose | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Arbor Hole Size | Size | Gender | Dia. | Lg. | Dia. | Lg. | For Keyway Wd. | Material | Fabrication | Each | |
| 1/2" | 7/16"-20 | Female | 1 3/8" | 1" | 1/2" | 9/16" | 1/4" | Steel | Heat Treated | 0000000 | 0000000 |
| 3/4" | 7/16"-20 | Female | 2" | 1" | 3/4" | 11/16" | 5/16" | Steel | Heat Treated | 0000000 | 000000 |
| 1" | 7/16"-20 | Female | 2.38" | 1" | 1" | 11/16" | 3/8" | Steel | Heat Treated | 0000000 | 000000 |
| 1 1/4" | 7/16"-20 | Female | 2.88" | 1" | 1 1/4" | 11/16" | 1/2" | Steel | Heat Treated | 0000000 | 000000 |
| 1 1/2'' | 7/16"-20 | Female | 3 1/2" | 1 3/4" | 1 1/2" | 1" | 5/8" | Steel | Heat Treated | 0000000 | 000000 |
R8 Taper Arbors for Slitting Saws
Mount this arbor into manual milling machines that have an R8 taper spindle. It has a spring-loaded centering mechanism which allows it to hold saws with a range of arbor holes sizes. Use with high-speed steel slitting saws.
For Max. Cutter | Shank Thread | Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Arbor Hole Size | Dia. | Thick. | Size | Gender | Dia. | Lg. | Overall Lg. | Material | Includes | Each | |
| 1/2", 5/8", 3/4", 7/8", 1" | 4" | 3/16" | 7/16"-20 | Female | 1 1/4" | 3/8" | 5 3/32" | Steel | Hex Key | 0000000 | 000000 |
R8 Taper Drill Chuck Arbors
Use with R8 taper spindles which are most often found on manual milling machines. The R8 taper end fits into a machine spindle and the Jacobs taper end is compatible with a Jacobs taper drill chuck. All arbors are made of hardened, precision-ground steel.
For technical drawings and 3-D models, click on a part number.
R8 Taper End Mill Holders
Hold end mills, drills, and reamers securely in manual milling machines that have an R8 taper spindle. Holders are ground to accurate size.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For End Mill Shank Dia. | For Number of End Mill Milling Ends | Internal Thread Size | Dia. | Lg. | Material | Fabrication | Includes | Each | |
| 1/8" | 1 | 7/16"-20 | 3/4" | 1 3/8" | Steel | Heat Treated | Set Screws | 0000000 | 000000 |
| 3/16" | 1, 2 | 7/16"-20 | 3/4" | 1 3/8" | Steel | Heat Treated | Set Screws | 0000000 | 00000 |
| 1/4" | 1, 2 | 7/16"-20 | 51/64" | 1 3/8" | Steel | Heat Treated | Set Screws | 0000000 | 00000 |
| 5/16" | 1 | 7/16"-20 | 7/8" | 1 3/4" | Steel | Heat Treated | Set Screws | 0000000 | 00000 |
| 3/8" | 1, 2 | 7/16"-20 | 1" | 1 3/8" | Steel | Heat Treated | Set Screws | 0000000 | 00000 |
| 1/2" | 1 | 7/16"-20 | 1 3/8" | 1 3/8" | Steel | Heat Treated | Set Screws | 0000000 | 00000 |
| 5/8" | 1 | 7/16"-20 | 1 21/32" | 1 1/2" | Steel | Heat Treated | Set Screws | 0000000 | 00000 |
| 3/4" | 1 | 7/16"-20 | 1 57/64" | 2 3/8" | Steel | Heat Treated | Set Screws | 0000000 | 000000 |
| 7/8" | 1 | 7/16"-20 | 2" | 2 3/4" | Steel | Heat Treated | Set Screws | 0000000 | 000000 |
| 1" | 1 | 7/16"-20 | 2 3/8" | 3 1/4" | Steel | Heat Treated | Set Screws | 0000000 | 000000 |
| 1 1/4" | 1 | 7/16"-20 | 2 1/2" | 3 1/4" | Steel | Heat Treated | Set Screws | 0000000 | 000000 |
| 1 1/2" | 1 | 7/16"-20 | 3" | 3 3/4" | Steel | Heat Treated | Set Screws | 0000000 | 000000 |
Morse Taper to R8 Taper Milling Machine Adapters
Convert tools with a Morse taper shank to an R8 shank for use in manual milling machines that have an R8 taper spindle. Holders are ground to accurate size.
Quick-Change Tool Holders for Milling Machines
After installing the R8 body in the milling machine spindle, tool holders can be switched out in seconds. To remove a tool holder, depress the brass locking button and rotate the collar on the R8 body. When a new tool holder is inserted, a spring-loaded pin snaps the collar back into the locked position.
R8 Taper Shank Thread | ||||||
|---|---|---|---|---|---|---|
| TIR (Total Indicated Runout) Accuracy | Gender | Size | Spindle Overhang | Material | Each | |
| 0.0005" | Female | 7/16"-20 | 1 1/8" | Steel | 0000000 | 0000000 |
Head | For End Mill | ||||||
|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Number of Milling Ends | Shank Type | Shank Dia. | Material | Each | |
| 1 3/8" | 1/2" | 1 | Straight | 1/8" | Steel | 0000000 | 0000000 |
| 1 3/8" | 11/16" | 1 | Straight | 3/16" | Steel | 0000000 | 000000 |
| 1 3/8" | 11/16" | 1 | Straight | 1/4" | Steel | 0000000 | 000000 |
| 1 3/8" | 1 3/16" | 1 | Straight | 3/8" | Steel | 0000000 | 000000 |
| 1 3/8" | 1 3/8" | 1 | Straight | 1/2" | Steel | 0000000 | 000000 |
| 1 5/8" | 1 9/16" | 1 | Straight | 5/8" | Steel | 0000000 | 000000 |
| 2 3/16" | 1 13/16" | 1 | Straight | 3/4" | Steel | 0000000 | 000000 |
| 2 15/16" | 2" | 1 | Straight | 1" | Steel | 0000000 | 000000 |
Overall | ||||||||
|---|---|---|---|---|---|---|---|---|
| Ht. | Wd. | Dp. | For Number of Tools | Number of Mounting Holes | Mounting Hole Dia. | Material | Each | |
| 1 1/2" | 8 3/4" | 12 1/4" | 10 | 4 | 3/16" | Steel | 0000000 | 0000000 |
Boring Tool Holders for Milling Machines
Instead of widening a hole using a lathe, which turns the workpiece while the cutting tool stays still, use these holders to turn your boring bar in a milling machine and keep the workpiece stationary. They’re good for creating holes that are too large to drill or a diameter you don’t have a drill bit for. To help you bore holes to precise diameters, these holders have an adjustment dial with fine increments. Mount them in your milling machine using their shank. They’re also known as boring heads.
Shank | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tool Bit Shank Diameter | Length | Head Diameter | Offset Travel | Vertical Hole Spacing | Overall Length | Material | Features | Each | |
Holder with R8 Taper Shank | |||||||||
| 3/8" | 4" | 2" | 0.75" | 0.625" | 6 7/16" | Steel | Adjustment Dial | 00000000 | 0000000 |
| 1/2" | 4" | 2 1/2" | 0.75" | 0.75" | 7 3/16" | Steel | Adjustment Dial | 00000000 | 000000 |
| 5/8" | 4" | 2 1/2" | 0.75" | 0.75" | 7 3/16" | Steel | Adjustment Dial | 00000000 | 000000 |
| 3/4" | 4" | 3" | 1.25" | 0.938" | 7 1/2" | Steel | Adjustment Dial | 00000000 | 000000 |
Collet Chucks
Securely hold collets in the spindle of a milling machine.
Use a nut wrench (sold separately) to tighten the chuck nut and secure the tool bit in the collet.