ARO Bant-A-Matic 8248-B Operator's Manual

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Tool

Products

OPERATOR'S MANUAL

INCLUDING: OPERATION, INSTALLATION & MAINTENANCE

BANT-A-MATIC®

SELF-FEED

DRILLS

Models 8248-B(

)-( )

SECTION

M106

MANUAL

Released:

4-1-68

Revised: 12-12-94

Form:

3262-2

IMPORTANT: READ THIS MANUAL CAREFULLY

BEFORE INSTALLING,

OPERATING OR SERVICING THIS EQUIPMENT.

OPERATING

PRECAUTIONS

Keep hands and clothing away from rotating end of tool.

Wear suitable eye protection while operating tool.

Disconnect 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 lubricator reser-

voir of recommended

F.R.L. with spindle oil (29665).

EVERY 160 HOURS OF TOOL OPERATION

- Inject NLGI #1

"EP" grease (33153), 1 to 2 strokes, thru grease fitting 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.

AIR SUPPLY REQUIREMENTS

For maximum operating efficiency, the following air supply specifi-

cations should be maintained to this air tool:

AIR PRESSURE

- 90 PSIG (6 bar)

AIR FILTRATION - 50 micron

LUBRICATED

AIR SUPPLY

HOSE SIZE - 5/16" (8 mm) I.D.

An ARO® model C28231-810

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 (41) is provided with 1-7/16" -

18 L.H. threads [remove thread

guard (47) for use] and a 1-7/16"x

1/2" long pilot diameter for fixture mounting. Foot and flange type

mounting brackets are available for tool mounting.

RECOMMENDED

LUBRICANTS

Afterdisassembly

is complete, all parts, except sealed or shielded

bearings, should be washed with solvent. To relubricate parts, or

for routine lubrication, use the following recommended

lubricants:

Where Used

Description

Air Motor

29665

1 qt. Spindle Oil

"0" Rings & Lip Seals

36460

4 oz. Stringy Lubricant

Gears and Bearings

33153

5 lb. "EP" - NLGI #1 Grease

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.

Loosen two screws (29) and remove cover (1).

Allow 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.

Determine the TOTAL STROKE LENGTH the drill must travel

to perform the drilling operation - see illustration below.

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

tance between the end of the screw and the stud (26) equals

the total stroke length.

Tighten jam nut (8).

Loosen jam nut (8) and turn adjustment screw "B" (valve-in-

head models only) so the distance between the end of the

screw and the button bleed valve (25) is slightly GREATER

than the distance set for adjustment

screw "A".

Start and let the unit advance until the adjustment

screw "A"

makes contact with the stud (26).

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

adjustment screw "B" until it depresses the button bleed valve

(25) enough to cause the unit to retract.

lighten

jam nut (8).

See "FEED RATE CONTROL

VALVES", page 2.

ADJUSTMENT SCREW "6"

DEPTH

OF DRILLING

OPERATION

THIS DISTANCE MUST

TOTAL STROKE LENGTH

ADJUSTMENT SCREW "'A'

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) 672-0601.

A R0 Tool Products

Ingersoll-Rand

Company

INGERSOLL-RAND,

1725 U.S. No. 1 North

P.O. Box 8000

Southern Pines, NC 283888000

01994

THE ARO CORPORATION.

PRINTED

IN U.S.A.