Head Liner (HL Type), 3/4 (0.7500) × 1 × 2 1/8 — HL64-34x3/4

Head Liner (HL Type) part number HL64-34x3/4 from ACTEK Manufacturing & Engineering, part of ACTEK's Drill Bushings & Locking Accessories line. Specifications: I.D. (A) 3/4 (0.7500); O.D. (B) 1; Length (C) 2 1/8; ANSI Symbol No. HL64-34; I.D. (A)1 0.7503|0.7506; O.D. (B)1 1.0018|1.0015. Dimensions: F = 1 1/8, G = 1/8. Manufacturer technical notes: DRILL BUSHINGS. FEATURES:. 1. FULL RADIUS ON I.D. FOR PROPER ENTRY ALIGNMENT. PREVENTING WEAR AND BREAKAGE OF TOOL. 2. DOUBLE CHAMFERED HEAD. 3. TWO WAY UNDERCUT ALLOWS BUSHING TO SIT FLUSH ON TOP. 4. INTERNALLY GROUND DIAMETERS ENSURE STRAIGHTNESS. 5. 45° LEAD FOR EASY ENTRY INTO JIG. 6. ADDITIONAL CONCENTRIC GROUND LEAD FOR PROPER INITIAL. ALIGNMENT AND EASY ENTRY. 7. STAMPED WITH SIZE AND TRADEMARK FOR YOUR PROTECTION. 8. SLIP RENEWABLE BUSHING HEADS KNURLED FOR SPEED IN. REMOVAL AND REPLACEMENT. SUGGESTIONS FOR INSTALLATION:. 1. AVOID EXCESSIVE INTERFERENCE FIT. 2. BEFORE INSTALLING LUBRICATE MOUNTING HOLE AND O.D. OF. THE BUSHING. 3. INSTALL BUSHINGS WITH AN ARBOR PRESS WHENEVER POSSIBLE. 4. PREPARE MOUNTING HOLES CAREFULLY. TECHNICAL INFORMATION:. MATERIAL: C1144. HEAT TREAT: CASE HARDENED. HARDNESS: ROCKWELL C61-65 IN THE HOLE. CONCENTRICITY. I.D. RANGE OF 1/8” TO 1/2” TIR. Manufacturer documentation: Technical Information on Drill Bushings.