Jacobs 1/2" Straight Shank-4JT Drill Chuck Arbor (limited stock)
Model #: JACA-1/2-4J
Description: 1/2" Straight- 4JT JACOBS BRAND Drill Ch Arbor (limited stock)
- Shank Size: 1/2" Straight Shank
- Chuck (Jacobs) Taper: 4JT
- Shank may be fully cylindrical, or have a recessed portion.
- Photo is for general reference only, details such as size of shoulder may vary.
For drill chucks with Jacobs taper backs.
Determine both shank size (to fit into your Drill Press,tailstock, etc.) & chuck (Jacobs) taper to order the correct arbor.
Dimensions of Morse, Jacobs, and B&S tapers are posted in the "Metalworking Reference" portion of this website.