850/997/998/1048/1098 BIG END BEARING SETS

Name: 850/997/998/1048/1098 BIG END BEARING SETS
Brand: MED Engineering
SKU: MED-1500-BES_
Price: 36.0 GBP
Availability: InStock

Part No: MED-1500-BES_

£36.00 £30.00 EXC VAT

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Availability: In Stock

Description

High quality big end bearing sets for all small-bore A-Series engines, as used in all engine builds here at MED.

We stock a wide range of bearings to suit standard size and re-ground crankshafts - see the dropdown menu above.

For reference, the standard small-bore big end journal size is 1.625", the same as used in original Cooper S engines.

Please contact us for price and availability if your crankshaft has been reground further than 0.040".

Frequently Asked Questions

What is the specification of these bearings?

ACL Duraglide 780 are a tri-metal copper-lead heavy duty bearing suitable for any high performance A-Series engine. They are manufactured in Australia with strict quality control standards, and we've used them for decades with excellent durability.

Which bearings do I need?

Small bore (848-1048cc) engines all had 1.625" diameter big end journals, the same as the Cooper S and 1275 Sprite. These are based on the 1.625" size, with oversize bearing sets available in 0.010" increments. You will need to measure your journals with a micrometer to be sure.

What is the equivalent part number for these bearings?

ACL lists the 998 big end bearings as 4B2201. The same bearings are used in the 1275 MG Midget/AH Sprite and original Cooper S engines.

Can you supply in-between or non-standard sizes to suit my crankshaft?

No, you'll need to have your crankshaft machined to the correct size if the journals are worn out of tolerance, rather than try to size bearings to suit. Unfortunately it's not feasible to have custom bearings produced.

My crankshaft has already been reground several times - can you supply larger sizes?

We stock over-size bearings up to 0.040" in 0.010" increments, and can usually supply anything up to 0.060" by special order. If you need a size that's not listed, please contact us and we can check availability.