Aloris Internal Threading Bars, R.H. & L.H.
Aloris ATB Series threading bars can be used for internal right or left-hand threading. Available in five sizes, these bars accommodate standard triangular-shaped throwaway threading inserts in a hardened seat.
The ATB Series shank has three flat sides specially designed for use in Aloris boring bar holders #1, #2, #13, #4 and # 41. They may also be used in any Aloris boring bar holder. Excellent for CNC machines.

Dimensions:
| Item Number | ATB-1L | ATB-1R | ATB-2L | ATB-2R | ATB-3L | ATB-3R |
| A | 1/2" | 1/2" | 3/4" | 3/4" | 1" | 1" |
| B | 7/8" | 7/8" | 1-1/2" | 1-1/2" | 2-1/4" | 2-1/4" |
| C | 5/8" | 5/8" | 5/8" | 5/8" | 7/8" | 7/8" |
| D | 3/4" | 3/4" | 3/4" | 3/4" | 1" | 1" |
| L | 6-1/2" | 6-1/2" | 7" | 7" | 10" | 10" |
| I.C. | 1/4" | 1/4" | 3/8" | 3/8" | 3/8" | 3/8" |
| Item Number | ATB-4L | ATB-4R | ATB-5L | ATB-5R |
| A | 1-3/16" | 1-3/16" | 1-7/16" | 1-7/16" |
| B | 2-3/4" | 2-3/4" | 3-1/8" | 3-1/8" |
| C | 1-1/16" | 1-1/16" | 1-1/4" | 1-1/4" |
| D | 1-1/4" | 1-1/4" | 1-1/2" | 1-1/2" |
| L | 12" | 12" | 14" | 14" |
| I.C. | 3/8" | 3/8" | 1/2" | 1/2" |
For more info, visit www.p65warnings.ca.gov.
