Bosch 1035VSR Operating Instructions - Page 8

CHUCK KEY & STORAGE AREA Keyed models are equipped with a chuck key that can be conveniently located on the cord protector where it is always handy and unlikely to get lost or misplaced (Fig. 5). FIG. 5 DEPTH GAUGE (Optional Accessory) Your drilling depth can be pre-set and/or repeated by using the depth gauge (optional accessory), not included. Setting depth: After the auxiliary handle is installed, push down on the depth gauge release lever, slide the depth gauge to desired depth and release pressure on lever to lock the depth gauge in place (Fig. 1). Operating Tips You will extend the life of your bits and do neater work if you always put the bit in contact with the work before pulling the trigger. During the operation, hold the tool firmly and exert light, steady pressure. Too much pressure at low speed will stall the tool. Too little pressure will keep the bit from cutting and cause excess friction by sliding over the surface. This can be damaging to both tool and bit. DRILLING WITH VARIABLE SPEED The trigger controlled variable speed feature will eliminate the need for center punches in hard materials. The variable speed trigger allows you to slowly increase RPM. By using a slow starting speed, you are able to keep the bit from "wandering". You can increase the speed as the bit "bites" into the work by squeezing the trigger. DRIVING WITH VARIABLE SPEED Variable speed drills will double as a power screwdriver by using a screwdriver bit in the drill mode. The technique is to start slowly, increasing the speed as the screw runs down. Set the screw snugly by slowing to a stop. Prior to driving screws, pilot and clearance holes should be drilled. FASTENING WITH SCREWS The procedure shown in (Fig. 6) will enable you to fasten materials together with your hammer drill in the drill mode without stripping, splitting or separating the material. The adjustable screw drill accessory will do all of these operations quickly and easily. Screw drills are available for screw sizes No. 6, 8, 10 and 12. First, clamp the pieces together and drill the first hole 2/3 the diameter of the screw. If the material is soft, drill only 2/3 the proper length. If it is hard, drill the entire length. Second, unclamp the pieces and drill the second hole the same diameter as the screw shank in the first or top piece of wood. Third, if flat head screw is used, countersink the hole to make the screw flush with the surface. Then, simply apply even pressure when driving the screw. The screw shank clearance hole in the first piece allows the screw head to pull the pieces tightly together. FASTENING WITH SCREWS 1. Drill 2/3 diameter and 2/3 of screw length for soft materials, full length for hard materials Screw Apply a slight even pressure when driving screws FIG. 6 2. Drill same diameter as screw shank 3. Countersink same diameter as screw head Adjustable Screw Drill -8-