With more than 85 years of industry leadership, Sunnen has the solution for virtually any precision honing application.

Get precise bore accuracy, geometry, and surface finish for high pressure injectors, lower emissions and better fuel economy.

Get precise bore accuracy and surface finish for higher-pressure hydraulic valves.

Get precise bore geometry and advanced surface finishes for smoother running gears.

Get precise bore geometry and consistent crosshatch for lower emissions, better fuel economy, and reduced oil consumption.

Get precise bore accuracy and advanced surface finishes for lower emissions and greater fuel efficiency.

Get twice the metal removal rate for increased shop throughput.

For more than 85 years Sunnen has been the leader in automotive honing and offers an extensive line of honing machines for connecting rod and cylinder reconditioning and line honing. A Sunnen system can be found in high performance engine building shops as well as production rebuilders.

Sunnen honing machines set the standard for high precision bore sizing on steering knuckles and components. Closer tolerances on steering components result in a quiet, vibration-free ride.

Sunnen is the industry leader in honing solutions for quality brake drums for all vehicles. Sunnen honed brake drums provide smooth, consistent and quiet braking action.

Improve roundness, surface finish and size control on connecting rods of all sizes from chainsaws to heavy-duty construction equipment with Sunnen honing machines.

Create a smooth and consistent bore surface finish while greatly reducing labor costs with Sunnen's HTA series honing machines.

Sunnen honing equipment provides the high precision necessary for maximum life and efficient operation in turbo chargers and components.

Sunnen has the solution for honing virtually all compressors from cooling systems for large building to dorm refrigerators.

Get the most complete selection of honing systems in the industry. Sunnen systems offer superior precision, accuracy, speed, finish and ease-of-use for virtually any bore sizing application.