Pressed Bimetallic Half Thrust Washers

Pressed bimetallic half thrust washers are semicircular (half-ring) plain bearings made from a bimetal - a steel backing bonded to a soft bearing alloy - then pressed to shape. They are fitted in pairs around a shaft to absorb axial thrust and control end-float, most commonly on engine crankshafts where a full ring cannot be slipped over the shaft.

Their bimetallic construction combines a strong steel back with a low-friction running face, giving long life under the high, fluctuating thrust loads of an engine. They are produced and imported in large numbers for the automotive and engine-component industries, which is why this half thrust washer is covered under the Bearings (Quality Control) Order, 2025 and now requires the BIS ISI Mark under IS 9764 (Part 2):2022.

IS 9764 (Part 2):2022 defines the features and tolerances of pressed bimetallic half thrust washers - bond quality, lining, thickness, and form - that determine how well they control end-float and resist wear. For engine-bearing manufacturers, certifying these half washers alongside their main and big-end bearings creates a fully ISI-marked engine-bearing set that OEM and aftermarket buyers increasingly demand. Standphill India manages the IS 9764 (Part 2) licence end-to-end and can bundle it with your other plain-bearing certifications.

BIS-recognized laboratories evaluate pressed bimetallic half thrust washer against IS 9764 (Part 2):2022 for:

• Features & form - semicircular geometry per IS 9764 Part 2
• Thickness & tolerances - axial control dimensions
• Bimetal bond - steel-to-lining bond strength
• Lining material - bearing alloy composition
• Hardness - backing and lining hardness
• Surface finish - running-face quality

Typical timeline: 8-14 weeks. Foreign manufacturers (FMCS) may take longer due to overseas audit scheduling.

• BIS application form (Manakonline)
• Factory registration proof
• MSME / Udyam certificate
• Manufacturing process flow chart
• List of machinery (grinding, heat treatment, assembly)
• List of in-house testing equipment
• Bearing steel grade details
• Product range & size designations
• Trademark / brand registration
• AIR appointment (foreign mfr.)
• BIS-recognized lab test report

Being an MSME under the Bearings QCO 2025 gives you two significant advantages: a longer compliance window (9 months for Small, 12 months for Micro) AND substantial discounts on BIS ISI Mark marking fees - the per-unit fee paid to BIS based on your annual production or import volume.

Standphill India is a global BIS consultancy that handles pressed bimetallic half thrust washer certification end-to-end - from application and factory-audit preparation to lab testing and licence grant. We serve Indian manufacturers and overseas producers in China, Japan, Germany, the USA, and Korea with complete FMCS and Authorized Indian Representative services. BIS consultancy services all over the world.