Ingersoll-Rand Official Operator's Manual for ARO Self Feed Drills and Par-A-Matic Drill

ARO.	OPERATOR’S MANUAL	SECTION	M103
		MANUAL	11
	INCLUDING:OPERATION,INSTALLATION& MAINTENANCE	Released:	8/9O
	PAR-A-MATIC®SELF-FEEDDRILLS	Revised:	11-20-98
	Models 8255-A( )-( ) and 8355A( )-( )	Form:	1612-2

IMPORTANT: READ THIS MANUAL CAREFULLY BEFORE INSTALLING,

OPERATING OR SERVICING THIS EQUIPMENT.

OPERATING AND SAFETY PRECAUTIONS

lKeep hands and clothing away from rotating end of tool.

lWear suitable eye protection while operating tool.

lDisconnect air supply from tool before removing/installing bit or performing other maintenance procedures.

ROUTINE LUBRICATION REQUIREMENTS

Lack of or an excessive amount of lubrication will affect the perfor- mance and life of this tool. Use only recommended lubricants at below time intervals:

EVERY 8 HOURS OF TOOL OPERATION - Fill air line lubricator reservoir of recommended F.R.L. with spindle oil (29665).

EVERY 180 HOURS OF TOOL OPERATION - Inject NLGI #1 “EP”grease (33153), 1 to 2 strokes, thru grease filling in gear housing. NOTE: Spindle must be extended from outer sleeve suf- ficiently to expose grease fitting in gear housing. Gearing should contain approximately 1/8 oz. (3.5 g) of grease per set of gears.

AIR SUPPLY REQUIREMENTS

For maximum operating efficiency, the following air supply specifi- cations should be maintained to this air tool:

lAIR PRESSURE - 90 PSIG (6 bar) l AIR FILTRATION - 56 micron

. LUBRICATED AIR SUPPLY

l HOSE SIZE - 5/16” (8 mm) I.D.

An ARO® model C28221-810 air line FILTER/REGULATOR/LU- BRICATOR (F.R.L.) is recommended to maintain the above air supply specifications.

MOUNTING

The nose end of the outer sleeve (43) is provided with 2” - 16 L.H. threads (remove thread guard [49] for use) and a 2” x 1-1/8” long pilot diameter for fixture mounting. Foot and flange type mounting brackets are available for tool mounting.

RECOMMENDED LUBRICANTS

After disassembly is complete, all pans, except sealed or shielded bearings, should be washed with solvent. To relubricate parts, or for routine lubrication, use the following recommended lubricants:

Where Used

Air Motor 296651 qt. Spindle Oil

“0”Rings 8 Lip Seals 36480 4 oz. Stringy Lubricant

Gears and Bearings 33153 5lb. "EP"- NLGI#1Grease

SET-UP PROCEDURE

WARNING: Keep clear of rotating end of unit with hands and/or clothing. Keep fingers/hands from being pinched between hous- ing or valves and adjustment screws and/or trip bracket.

lLoosen two screws (31) and remove cover (1).

lAllow a minimum distance of 1/4" between the drill point of the unit and the workpiece (this is necessary for the air motor to start and reach free speed before the drill point touches the

workpiece).

0Determine the TOTAL STROKE LENGTH the drill must travel to perform the drilling operation - see illustration below.

0Loosen jam nut (8) and turn adjustment screw "A” so the dis-

tance between the end of the screw and the stud (28) equals the Total Stroke Length.

0lighten jam nut (8).

lLoosen jam nut (8) and turn adjustment screw ”B" (valve-it+ head models only) so the distance between the end of the screw and the button bleed valve (27) is slightly GREATER than the distance set for adjustment screw “A,.

lStart and let unit advance until the adjustment screw “A". makes contact with the stud (28).

lCarefully, and be aware that the unit is going to retract, turn the

adjustment screw “B"until it depresses the button bleed valve (27) enough to cause the unit to retract.

lTighten jam nut (8).

lSee “FEEDRATE CONTROL VALVES”, page 2.

For parts and service information, contact your local ARO distributor, or the Customer Service Dept. of the Ingersoll-Rand Dis- tribution Center, White House, TN at PH: (615) 672-0321, FAX: (615) 672-0801.

ARO Tool Products

Ingersoll-Rand Company

1725 U.S. No. 1 North P.O. Box 8000 l Southern Pines, NC 28388-8000

©1998 THE ARO CORPORATION l PRINTED IN U.S.A.