Tool type: Fine boring toolsThe versatile 391.37A/B system can be used for both fine boring and face grooving applications. It allows precision adjustment in microns in order to achieve close hole tolerances. Build modular assemblies with Coromant Capto or HSK for increased tooling flexibility.Features & Benefits- Choose between conventional (.37A) and high speed (.37B) fine-adjustable head- Flexible solution for a broad diameter range- Excellent surface finish with wiper inserts- Close hole tolerances of IT6Features- Diameter adjustment by 0.002 mm (0.00008 inch) for high accuracy- The high speed fine boring heads have an adjustable counterweight, which enables runs at 20 000 rev/min- Reduction sleeves available from size 20 to 16- Internal coolant supply/Cutting fluid through the toolApplication- Fine boring for small diameters from 3 mm (0.118 inch)- For conventional fine boring and face grooving