Sandvik Coromant R429U-E16-0502502A Fine Boring Head E16 Shank
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The Sandvik Coromant R429U-E16-0502502A is a new, factory-sealed fine boring head from the CoroBore 429 series, designed for precision finish boring operations with adjustable radial offset for achieving tight diameter tolerances. Decoded from the part number: "R429U" identifies the CoroBore 429 Ultra-precision fine boring system; "E16" specifies the E-type (cylindrical) shank with 16 mm diameter; "05" encodes a minimum boring diameter of 5.0 mm; "025" encodes a maximum boring diameter of 25.0 mm; and "02A" denotes the variant/revision suffix. The tool body is made in Germany (confirmed on label) and features a fine-pitch adjusting mechanism that allows micrometric diameter adjustment, typically in 0.002 mm diameter increments, enabling bore tolerances in the IT6–IT7 range. It accepts a single indexable cartridge/blade with a small-diameter boring tip visible in the photos, and is compatible with Sandvik CoroBore 429 system adapters and toolholders accepting an E16 straight shank. This unit is stored in a Zerust VCI corrosion-prevention bag, confirming new/unused condition with no signs of wear or use.
Product Specifications
| Brand | Sandvik Coromant |
| MPN | R429U-E16-0502502A |
| Material ID | 5746681 |
| Item Number | 11432934 |
| Series | CoroBore 429 Ultra-Precision Fine Boring |
| Shank Type | E-type cylindrical (straight) |
| Shank Diameter | 16 mm |
| Min Boring Diameter | 5.0 mm |
| Max Boring Diameter | 25.0 mm |
| Adjustment Increment | 0.002 mm (diameter) |
| Country of Origin | Germany |
| Condition | New |
| Packaging | Zerust VCI corrosion-prevention sealed bag |