the 4HPH offers the reliability and performance professionals expect from Sunnen
The Sunnen BL5 Mandrel is engineered to deliver exceptional accuracy and surface finish for small to mid-sized bore honing applications
repeatable results in both production and repair environments
engineered for high-performance cutting in hard materials
Designed for use with P28 mandrels
BL12 SOFT STEEL MANDREL the 4HPH offers the reliabilityThe Sunnen BL12 Mandrel is designed for accurate, efficient honing of small to mid sized bores, delivering excellent roundness, size control, and surface finish. Built for durability and consistency, the BL12 integrates effortlessly with Sunnen machines, making it ideal for high precision applications in automotive, aerospace, and general manufacturing.