Stopper Stroke Wing Bolt Dust Bag Rail

(2)Adjusting the dust-collecting adaptor.

a)Adjusting the position of the dust- collecting adaptor.

After firmly inserting the drill bit, loosen the wing bolt and drill bit tip and the end of the dust-collecting adaptor in contact with each other (see Fig.11).

b)Setting the hole-drilling depth. Move the stopper to determine the stroke. The stroke is the hole-drill- ing depth (see Fig.11).

◯The maximum hole-drilling depth when using the dust-collecting adaptor is 4" (100 mm).

◯It is possible when using the dust- collecting adaptor to use HITACHI drill bits up to a overall length of 8- 1/2" (216 mm). A hole-drilling depth of 1-3/4" (46 mm) will allow dust- collecting when the overall length of the drill bit is 4-9/16" (116 mm).

(3)Drilling holes

When drilling holes, secure the main unit so that the end of the dust-collect- ing adaptor contacts with the concrete surface perfectly during drilling. Dust- collecting effectiveness is reduced if the adaptor is not in contact with the sur- face (see Fig.12).

(4)Removing dust

Excessive dust in the dust bag will re- duce dust-collecting efficiency. Remove dust from the dust bag regularly.

Remove the dust bag from the main unit, pull out the rail and throw away the dust and clean. (see Fig. 13).

Stopper Stroke Wing Bolt

Fig.11

Fig.12

Dust Bag

Rail

Fig.13