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ACL Performance Race H Series Main Bearing Set 5M1112H-STD for Alfa Romeo 1570/1779/1962cc - 5M1112H-STD
ACL Performance Race H Series Main Bearing Set 5M1112H-STD for Alfa Romeo 1570/1779/1962cc - 5M1112H-STD - Image 2 ACL Performance Race H Series Main Bearing Set 5M1112H-STD for Alfa Romeo 1570/1779/1962cc - 5M1112H-STD - Image 2

ACL 5M1112H-STD Performance Race H Series Main Bearing Set

The 5M1112H-STD by ACL represents a pinnacle of engineering designed specifically for high-performance applications. These Trimetal engine bearings offer a unique blend of design, metallurgy, and precision engineering, ensuring they can withstand the demands of higher RPM conditions typical in competitive racing and spirited driving.

Key Features

  • High-strength overlay plate with reduced thickness enhances fatigue resistance.
  • Hardened steel backs on all rod bearings improve support for the bearing lining and enhance retention within the housing.
  • Increased crush for superior bearing retention, crucial for maintaining stability under load.
  • Elimination of flash plating on the back of the bearings facilitates better heat transfer and maximizes grip between the bearings and their housing.
  • Enhanced eccentricity compensates for bore distortion at elevated RPMs, aiding in the formation of hydrodynamic oil films.
  • 3/4 grooved design optimizes load-carrying surface area and ensures efficient oil flow to conrod bearings.
  • Tight wall tolerances maintain consistent clearances, critical for performance applications.
  • Enlarged ID chamfers accommodate large fillet radii on performance crankshafts, ensuring compatibility with high-performance builds.

Specifications

  • Size: STD, .25
  • Oil Clearance: Standard
  • Half Type: Identical Halves
  • Material: Tri-metal with hardened steel backs
  • Min Standard Shaft Size: 2.3606 in / 59.959 mm
  • Max Standard Shaft Size: 2.3611 in / 59.972 mm
  • Min Standard Tunnel Size: 2.5062 in / 63.657 mm
  • Max Standard Tunnel Size: 2.5069 in / 63.675 mm
  • Max Wall at Crown: Std: 0.0720 in / 1.829 mm
  • Max Overall Length: 0.723 in / 18.36 mm

These bearings are engineered to meet the rigorous demands of performance applications, ensuring reliability and longevity in high-stress environments. The 5M1112H-STD is a solid choice for those looking to enhance their engine's performance while maintaining the integrity of their build.

Other Part Numbers:
ACL #acl5M1112H-STD

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Who is ACL?

ACL is a company that specializes in manufacturing and distributing high-quality engine bearings that have played a key role in the Australian automotive parts market. 

Based in Launceston, Tasmania, Australia, the company has been in the business for more than 70 years and has become the leading brand when it comes to its market segment.

Throughout the years, ACL has consistently provided top quality products and has become the equipment supplier of multiple Automotive brands such as Lancia, Mazda, Mini, Mitsubishi, Nissan, Peugeot, Subaru, Toyota, Volvo, Suzuki, Renault, SAAB, and more.  ACL also provides a replacement product range used by the aftermarket industry.

The company ensures that it maintains its high level of standard by employing manufacturing processes that are ISO certified. They also use the industry’s most advanced tooling equipment and designing software that allows them to create products that are superior in quality. ACL has been known worldwide to create bearings that are durable, innovative, and precise.

ACL also offers bearing used for high-performance applications. The company has been involved in motorsport racing since the 1960s and has manufactured bearings used in Brabham Formula 1. Today, their products are being used in different racing disciplines such as the Australian Supercar Championship, Drag racing, Driftings, and Rally.

Purchase ACL Bearings at Vivid Racing

Engine Bearings are a critical component of a vehicle and should not be overlooked. If you want to make sure that what you get is something you could rely on, then ACL is the brand for you. With over 200 engine applications, whether it’s an American, Australian, European, or Asian made vehicle, ACL got you covered. Visit Vivid Racing and check out their list of bearings that would fit your specific needs.

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