ISO turning toolholders and boring bars
ISO turning holders, boring bars and threading toolholders from the UK — external, internal, grooving and parting.
Galtona's Turning Toolholder range covers external turning, internal turning (boring bars), threading, grooving, and parting applications, built to the ISO clamping-system code standard (top clamping, top-and-hole clamping, wedge clamping, lever clamping, and screw clamping), with a full matrix of insert shapes, approach angles, clearance angles, hand orientations, shank sizes, and tool lengths.
External turning spans steel, ceramic, and Swiss-type toolholder families across all 6 ISO clamping systems. Internal turning boring bars (steel or carbide shank, with or without internal coolant) cover Ø8–60 mm. Threading holders (SER/SEL external, SIR/SIL internal) are manufactured with a 1.5° helix angle, matched to thread pitch and diameter via angled shims.
Grooving toolholders are manufactured from 44 HRc hardened tool steel with smooth surfaces and precise insert-pocket dimensions produced after heat treatment, for improved insert contact and tensile strength. Parting blades are hardened to 55 HRc, with parallelism held to ±0.03 mm over 150 mm length and flatness within 0.05 mm, for accurate, repeatable cuts.
Internal turning boring bars
Internal Turning Toolholders (Boring Bars)
Steel and carbide-shank boring bars, Ø8–60 mm, top/wedge/lever/screw clamping.
ISO code covers clamping system (A steel bar with internal coolant, C carbide shank, E coolant-through carbide shank, S steel shank), shank diameter, and tool length — e.g. S25T DCLNR-L 12.
Full internal-turning family index — approach angle by code
| Code | Approach angle |
|---|---|
| CKUNR | 93° |
| DCLNR-L | 95° |
| DDUNR-L | 93° |
| DDQNR-L | 107.5° |
| DTFNR-L | 91° |
| DWLNR-L | 95° |
| MVLNR-L | 95° |
| MVPNR-L | 117.5° |
| SCLCR-L | 95° |
| SDQCR-L | 107.5° |
| SDUCR-L | 93° |
| SDWCR | 62.5° |
| STFCR-L | 90° |
| SVJCR | 93° |
| SWUBR-L | 93° |
CKUNR — representative sizes
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| Code No | d | L1 | L2 | f | D | Insert |
|---|---|---|---|---|---|---|
| S32S CKUNR 16 | 32 | 250 | 60 | 22 | 44 | KNUX 1604.. |
| S40T CKUNR 16 | 40 | 300 | 70 | 27 | 48 | KNUX 1604.. |
DCLNR — representative sizes
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| Code No | d | L1 | L2 | f | D | Insert |
|---|---|---|---|---|---|---|
| S25R DCLNR-L 12 | 25 | 200 | 55 | 17 | 32 | CNMG 1204.. |
| S32S DCLNR-L 12 | 32 | 250 | 60 | 22 | 40 | CNMG 1204.. |
| S40T DCLNR-L 12 | 40 | 300 | 65 | 27 | 50 | CNMG 1204.. |
| S40T DCLNR-L 16 | 40 | 300 | 65 | 27 | 50 | CNMG 1606.. |
DDUNR / DDQNR — representative sizes
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| Code No | d | L1 | L2 | f | D | Insert |
|---|---|---|---|---|---|---|
| S20Q DDUNR-L 11 | 20 | 180 | 45 | 14 | 27 | DNMG 1104.. |
| S32S DDUNR-L 11 | 32 | 250 | 55 | 22 | 40 | DNMG 1104.. |
| S40T DDUNR-L 15 | 40 | 300 | 65 | 27 | 50 | DNMG 1506.. |
| S20Q DDQNR-L 11 | 20 | 180 | 45 | 13 | 25 | DNMG 1104.. |
| S40T DDQNR-L 15 | 40 | 300 | 65 | 27 | 50 | DNMG 1506.. |
MVLNR / MVPNR — representative sizes
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| Code No | d | L1 | L2 | f | D | Insert |
|---|---|---|---|---|---|---|
| S25R MVLNR-L 16 | 25 | 200 | 50 | 17 | 32 | VNMG 1604.. |
| S40T MVLNR-L 16 | 40 | 300 | 60 | 27 | 50 | VNMG 1604.. |
| S25R MVPNR-L 16 | 25 | 200 | 50 | 17 | 32 | VNMG 1604.. |
| S40T MVPNR-L 16 | 40 | 300 | 60 | 27 | 50 | VNMG 1604.. |