| Letters & Their Meanings |
A
Steel backed lead free aluminum silicon alloy bearings without overlay. Standard replacement material. | M
Steel backed bearings with a Micro-Babbitt lining (a very thin layer of lining which reduces the microscopic deflections that occur to a bearing when loaded and thus increases fatigue life). Solely intended for extreme high-horsepower applications. |
AL
Solid cast aluminum alloy bearings (material designation AL-1) or steel backed bearings with an aluminum alloy lining material designation AL-3, AL-4, AL-5, AL-6). Standard replacement material. | N
Narrowed for greater crankshaft fillet clearance. |
B
Steel backed bearings with a conventional babbit lining. | P
Steel backed bearings with an intermediate layer of copper-lead alloy and an electroplated lead-tin-copper overlay. Standard replacement material. |
C
Steel backed bearings with a copper-lead lining. | R
Indicates that the bearing can be resized to standard. When following a camshaft bearing, indicates that it has extra bore stock in the inside diameter. |
D
Bearing has dowel hole. | S
Indicates a set number designation. |
G
Steel backed bearings with a matrix of copper and an infiltrant of lead-tin babbitt. Precision undersizes are not resizable. | V
High performance bearing with a lead-indium overlay (on main sets this indicates partial groove). Solely intended for extreme high-horsepower applications. |
H
High performance bearing (on main sets this indicates partial groove). Perform the same as "A" and "P" bearings, but have the ability to carry more load. | VG
High performance bearing with a lead-indium overlay and a full annular groove. Solely intended for extreme high-horsepower applications. |
HG
High performance full annular grooved bearing. Perform the same as "A" and "P" bearings, but have the ability to carry more load. | X
Bearing has .001” more oil clearance than standard. |
HT
High performance with indentless locating lug. “Full Bore” design. Perform the same as "A" and "P" bearings, but have the ability to carry more load. | XX
Bearing has .002” more oil clearance than standard. |
K
TriArmor™ coating applied to the bearing surface, which offers extraordinary protection and lubricity. Enhanced wear characteristics increase bearing life in race engines and high performance street Engines. | W
Indicates a part that is a thrust washer (may also be designated upper or lower). |
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