937.323.2556 Email Us

Liquid Nitriding

Liquid nitriding is a subcritical surface enhancement process with one of the longest track records of success of any case hardening technology.

PVD Coatings

PVD coatings involve the deposition of thin (2-10 microns; 0.0001" – 0.0004") films on the surface of tools and components.

Engineered Bushings

HEF bushings are recognized worldwide for their excellent frictional and anti-seizure properties, and ability to withstand high loads.

FAM® & MANGACHOC®

TESCO high-temperature sleeve bearing

FAM bushings are manufactured from manganese steel, which provides excellent resistance to abrasive wear thanks to mechanical work hardening effect of the contact area. Only an initial greasing is required.

FAM bushings have internal cross hatched topography that provides an excellent distribution of grease and enables the removal of abrasive contaminants from the contact area

FAM L or MANGACHOC bushing have smooth internal diameter. They are mainly used for their high resistance to abrasion and high contact pressure in shock load working conditions, with no maintenance.

MANGACHOC technology is also available on spherical plain bearing in case of angular misalignment or flexion in the joint.

    Dyn. Load
N/mm2)		 Max Speed (m/s) Max Temp (°C) Abrasion resistance Shock resistance Corrosion resistance Low-Maintenance
FAM® 50 0.5 +380°C ++++ +++ + +++
FAM® L / MANGACHOC 50 0.5 +380°C +++ +++ + ++

Mating Shaft:
Shafts hardened for 56 to 60 HRC are recommended. For optimal performances of the joints, special shafts are available from HEF DUFERRIT: FAM ST, FAM HT, FAM OX.

Advantages: Applications:
  • No maintenance
  • High resistance to abrasion
  • High resistance to shocks
  • High pressures
  • Steel industry
  • Cement industry
  • Mining industry
  • Handling / Attachment
  • Petrochemical / Oil & Gas industry