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ACL Bearings 5M8138-.50 Main Bearing Set Undersize - 50mm

Manufacturer

Picture for manufacturer ACL Bearings

Part Number

5M8138-.50
6 reviews
Sale Price

$136.26

Estimated ship date Saturday, December 05

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Product Details

The ACL Bearings 5M8138-.50 is a precision-engineered main bearing set designed for crankshafts that have been ground .50mm (0.020") undersize. This bearing set is manufactured by ACL, a Tasmanian-based company with over 70 years of experience in producing high-quality engine bearings for automotive applications.

Key Features:

  • Undersize specification: .50mm (0.020") for reground crankshafts
  • Trimetal construction featuring aluminum-silicon alloy bearing material for enhanced strength and durability
  • Hardened steel backing provides superior support and retention in the bearing housing
  • Precision manufacturing to strict tolerances ensures proper oil clearance and optimal engine performance
  • Suitable for engine rebuilds where crankshaft journals have been machined undersize
  • ISO-certified manufacturing process guarantees consistent quality

ACL bearings are trusted by professional engine builders and are used in various motorsport applications worldwide. The 5M designation indicates this is a main bearing set, while the .50 suffix specifies the undersize dimension required for proper fitment on machined crankshafts. Each set includes all necessary main bearing shells for a complete installation.

Products specifications

Size

.50

Easy to use website. Good price on right product, shipped promptly.

Ordered a couple of items. The first was a air intake kit. I had put in all my info for my truck and chose one from the list to order. Won't fit. Called to tell them and they asked if I had called manufacturer...ummm no. Said I needed to contact them to verify wrong part. They were closed, so went to website. The part they sent me was a universal fit- for cars, not trucks, but did find right model- $90 more. Called back autoplicity and was told I need to go through email to get an RA# to return wrong part- site says I can call. Been on hold for over 20 mins and still waiting. Hope the Nerf bars I ordered fit! Update- they called me back, got my RA#. Very pleased with how Nick handled things- it was what I expected the first time. He verified the NERF bars will fit and will be changing the website so the universal intake does not show on list for vehicles with larger air outlets. Changing my rating to show my satisfaction with how it was eventually handled.

Lowest prices of what I was looking for and super fast shipping!!

Really easy Internet shopping from my smartphone

Great company best prices around and would highly recommend

Product was a good price, fast shipping and great costumer service! will do business again!

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