B-1 Part Number Identification A Steel backed lead free aluminum silicon alloy bearings without overlay. 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). Precision undersize bearings are not resizable. AL-1 semi bearings are resizable to standard size. AP See definitions for "A" and "P" suffixes. B Steel backed bearings with a conventional babbit lining. Precision undersizes are not resizable. B-60 bearings are resizable to standard size (material designation B-1). C Steel backed bearings with a copper-lead lining. Precision undersizes are not resizable. C-60 bearings> are resizable to a standard size (material designation C-1). D Bearing has dowel hole. G Steel backed bearings with a matrix of copper and an infiltrant of lead-tin babbitt. Precision undersizes are not resizable. G-60 bearings are resizable to standard size (material designation C-1). H High performance bearing (on main sets this indicates partial groove). HG High performance full annular grooved bearing. HT High performance with indentless locating lug. “Full Bore” design. K High performance bearing with proprietary TriArmor™ coating applied to the bearing surface. M Steel backed bearings with a Micro-Babbitt lining. Precision undersizes are not resizable (material designation B-2). N High performance bearing narrowed for greater crankshaft fillet clearance. P Steel backed bearings with an intermediate layer of copper-lead alloy and an electroplated lead-tincopper overlay. Precision undersizes are not resizable (material designation TM-1, TM-, TM-112). 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. All other camshaft bearings are precision type (material designation B-1, C-1, AL-3). S Indicates a set number designation. V High performance bearing with a lead-indium overlay (on main sets this indicates partial groove). VG High performance bearing with a lead-indium overlay and a full annular groove. X Bearing has .001" more oil clearance than standard. XX Bearing has .002" more oil clearance than standard. W Indicates a part that is a thrust washer (may also be designated upper or lower). Bearing Material Designations & Terminology AL-1 Solid cast aluminum alloy. AL-3 Steel backed aluminum alloy without overlay. AL-4 Steel backed aluminum alloy with babbitt overlay. AL-5 Steel backed lead-free aluminum silicon alloy without overlay. B Rolled Bronze B-1 Steel backed tin or lead base conventional babbitt (nominal .020” thickness). C-1 Steel backed copper-lead matrix without overlay TM-1 Steel backed copper-lead matrix with overlay TM-77 Steel backed bearings with an intermediate layer of copper-lead alloy and an electro-plated lead-base overlay. Precision undersizes are not resizable. TM-112 Steel backed bearings with an intermediate layer of copper-lead alloy and an electro-plated lead-base overlay. Precision undersizes are not resizable. VP-2 Steel backed bearings with an intermediate layer of copper-lead alloy and an electroplated lead indium overlay. Not resizable. VP-3 Steel backed bearings with an intermediate layer of copper-lead alloy and an extra thick electroplated lead indium overlay. Not resizable. CLEVITE / PERFECT CIRCLE Warranty Information 12 months