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Tool Holders / T-System Boring Bars
TT-NR/L
6 sizes available · 8 specification fields · standard: ISO
TT-NR/L is a boring bar for internal turning that takes negative 60° triangle (T-type) inserts. It is listed here in 6 sizes, 23–37.5 mm shank height, right- and left-hand versions, each with full specifications and a dimensioned drawing. Typical use: boring, internal turning and back-facing.
Insert compatibility
This family is built for the following insert designations (as listed in the catalogue data). The exact size in each row of the table below is in the Insert designation column.
- TNM. 1604..
Specifications
| Product code | Insert designation | Cutting direction (hand) | Connection diameter (mm) | Functional length (mm) | Functional width (mm) | Shank height (mm) | Minimum working diameter (mm) |
|---|---|---|---|---|---|---|---|
| S25S TT-NR 16 | TNM. 1604.. | R | 25 | 250 | 17 | 23 | ≥32 |
| S25S TT-NL 16 | TNM. 1604.. | L | 25 | 250 | 17 | 23 | ≥32 |
| S32T TT-NR 16 | TNM. 1604.. | R | 32 | 300 | 22 | 30 | ≥40 |
| S32T TT-NL 16 | TNM. 1604.. | L | 32 | 300 | 22 | 30 | ≥40 |
| S40U TT-NR 16 | TNM. 1604.. | R | 40 | 350 | 27 | 37.5 | ≥50 |
| S40U TT-NL 16 | TNM. 1604.. | L | 40 | 350 | 27 | 37.5 | ≥50 |
Column codes
- Insert Code — Insert designation
- Product Direction — Cutting direction (hand)
- DCON — Connection diameter (mm)
- LF — Functional length (mm)
- WF — Functional width (mm)
- H — Shank height (mm)
- D min — Minimum working diameter (mm)
Dimensions in millimetres unless noted. Values are the manufacturer's published figures.
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