Extension Bars
Tool Holder Extension Bars
SDC and ER extension bars from the SUNSTONE 2026 catalog provide additional reach in standard and mini-nut configurations.
Catalog-matched product information.
SDC Extension Bars
SDC extensions are available in FIG.1 and FIG.2 configurations across ST12, ST16, ST20, ST25 and ST32 shank sizes.
SDC Extension Bars structure
Original sectional drawing and dimension references from the SUNSTONE 2026 catalog (P56).
Representative order codes and dimensions
| Shank | Order code | L | L1 | D | D1 | Clamping range | FIG |
|---|---|---|---|---|---|---|---|
| ST12 | SDC6-120 | 120 | 42 | 12 | 14 | 3-6 mm | 1 |
| ST16 | SDC6-100 | 100 | 30 | 16 | 14 | 3-6 mm | 2 |
| ST20 | SDC8-150 | 150 | 30 | 20 | 19 | 3-8 mm | 2 |
| ST25 | SDC8-250 | 250 | 115 | 25 | 19 | 3-8 mm | 2 |
| ST32 | SDC12-300 | 300 | 70 | 32 | 28 | 4-12 mm | 2 |
Representative rows transcribed from the cited catalog pages. Download the catalog for the complete range and technical notes.
ER Extension Bars
Standard ER and mini-nut ER-M extensions cover C10 through C32 shanks with catalog clamping ranges from 1 mm to 20 mm.
ER Extension Bars structure
Original sectional drawing and dimension references from the SUNSTONE 2026 catalog (P57-P58).
Representative order codes and dimensions
| Shank | Order code | L | L1 | D | D1 | Clamping range |
|---|---|---|---|---|---|---|
| C10 | ER8-100 | 100 | 24 | 10 | 14 | 1-5 mm |
| C16 | ER16-150 | 150 | 35 | 16 | 28 | 1-10 mm |
| C20 | ER20-200 | 200 | 40 | 20 | 34 | 1-13 mm |
| C25 | ER25-150 | 150 | 45 | 25 | 42 | 3-16 mm |
| C32 | ER32-100 | 100 | 51 | 32 | 50 | 3-20 mm |
| C16 | ER16M-200 | 200 | 35 | 16 | 22 | 1-10 mm |
Representative rows transcribed from the cited catalog pages. Download the catalog for the complete range and technical notes.
Where this system fits.
Selection depends on spindle interface, cutting process, projection length, tool diameter and required rigidity.
Deep cavities
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Long-reach machining
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Restricted access
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Modular tooling
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Send us your tooling requirement.
Share your machine interface, holder type, tool diameter and quantity. We will reply with product guidance and quotation information.
