Part No. 1340889 “A D E LTA REVISED 4-24-968 17-905 MORTISING ATTACHMENT FOR USE WITH THE 11-880 10" DRILL PRESS; 11-860 12” DRILL PRESS; 14-040 14” DRILL PRESS; 11-090 32” RADIAL DRILL PRESS; DELTA 15" DRILL PRESS; AND THE 17-800 16'%” DRILL PRESS. INTRODUCTION The 17-808 Mortising Attachment converts your drill press into an accurate mortising machine. It includes a chisel holder, base, split-ring bushings, fence and hoedown bracket.
. Loosen set screw (D) Fig. 5, and hex nut (E). 3. Slide rubber ring (F) Fig. 6, up on the quill {B) as shown and raise stop collar (G) approximately 7/8”. Tighten set screw (D} and hex nut () just enough to hold stop collar {G) in position. 4. Assemble the largest inside diameter splitting bushing (H} Fig. 7, supplied, around the quill (B} as shown. Fig. 5 Fig.
5. Slide chisel holder (J) Fig. 8, over spindle (A} and over splitting bushing (H}. NOTE: Before tightening hex nut (K) Fig. 8, make certain the slot in split-ring bushing (H), fines up with soot in chisel holder (J) as shown. 6. Tighten nut () Fig. 9. Make certain stop collar (G} and rubber ring (F) are flush against chisel holder (J). Tighten set resew (D) and hex nut {E). Return spindle to the upmost position, FOR DELTA 17-900 16" DRILL PRESSES ONLY 1. Assemble the chisel holder (A} Fig.
FOR ALL LISTED DELTA DRILL PRESSES 1. Assemble the fence (A) and hold down bracket (B} lo the drift press table using the two screws four fiat washers and two wing nuts (D), as shown in Fig. 11. 2. Assemble the vertical bar (F) to the held in the hold down bracket (B} and assemble the hold down arm (F) to the vertical bar, as shown in Fig. 12. Lock in place with the two thumb screws (G). 3. Assembly the two hold down rods {H) to the hold down bracket, as shown in Fig.
INSTALLING THE BIT AND CHISEL 1. DISCONNECT MACHINE FROM THE POWER SOURCE. 2. Insert the chisel {A} into the chisel holder (B} as shown in Fig. 15. NOTE: Position the chisel (A} into the chisel holder so that the upper face (C} of the chisel is about 1/32” below the bottom (D) of the holder and tighten lock screw {E). bit. (F) Fig..18, up through the chisel far as it will go and fasten in chuck securely. 4. IMPORTANT: Loosen corkscrew (E) Fig.
SPINDLE SPEEDS The correct spindle speed depends upon the size of the bit and the hardness of the wood. Best results will be obtained in the range from 650 to 2500 rpm. Use the slower speed for the larger bit diameters and the harder Woods. SHARPENING HOLLOW CHISELS The hand filing method for sharpening hollow chisels is recommended: To do the work properly, use 47 halftone and square files, cut. Examine a new tool for guidance.