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Tool Holders / C-System Boring Bars
CKUNR/L
8 sizes available · 8 specification fields · standard: ISO
CKUNR/L is a boring bar for internal turning that takes negative 55° parallelogram (K-type) inserts. It is listed here in 8 sizes, 23–47 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.
- KNUX 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 CKUNL 16 | KNUX 1604.. | L | 25 | 250 | 19 | 23 | ≥38 |
| S25S CKUNR 16 | KNUX 1604.. | R | 25 | 250 | 19 | 23 | ≥38 |
| S32T CKUNL 16 | KNUX 1604.. | L | 32 | 300 | 22 | 30 | ≥40 |
| S32T CKUNR 16 | KNUX 1604.. | R | 32 | 300 | 22 | 30 | ≥40 |
| S40U CKUNL 16 | KNUX 1604.. | L | 40 | 350 | 27 | 37.5 | ≥50 |
| S40U CKUNR 16 | KNUX 1604.. | R | 40 | 350 | 27 | 37.5 | ≥50 |
| S50V CKUNL 16 | KNUX 1604.. | L | 50 | 400 | 35 | 47 | ≥63 |
| S50V CKUNR 16 | KNUX 1604.. | R | 50 | 400 | 35 | 47 | ≥63 |
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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