Ingersoll-Rand 8670-1, 8670-3 User Manual

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OPERATOR's MANUAL

INCLUDING: OPERATION, INSTALLATION & MAINTENANCE

SELF-FEED DRILL

Models

8670-(

)-1( ) and 8670-(

)-3( )

SECTlON

MANUAL

M105

Released: 4/77

Revised: 8- 30-96 Form:

1022-2

FEATURES:

MODULAR DESIGN FOR EASY MAINTENANCE OUTER HOUSING OF DUCTlLE IRON FOR RlGlDlTY DUPLEX BEARING MOUNTED FRONT SPINDLE TO REDUCE RUN-OUT DWELL CONTROL - ADJUSTABLE FROM 0 TO 7 SECONDS TO-DEPTH AND FULL RETRACT SIGNAL PORTS REMOTE START AND RETRACT SIGNAL PORTS MANUAL START AND RETRACT VALVES EXTERNAL RETRACT FEED RATE ADJUSTMENT DIRECT READING STROKE SCALE ON REAR COVER ADJUSTABLE TRIP BRACKET HYDRAULIC CHECK WlTH 3-POSlTlON MOUNTING 5/8”-16 THREADED SPINDLE FOR CHUCK MOUNTlNG

IMPORTANT: READ THIS MANUAL CAREFULLY BEFORE INSTALLING,

OPERATING OR SERVICING THIS EQUIPMENT.

INDEX MODEL IDENTlFlCATlON GENERAL DESCRIPTION AND OPERATlON

MOUNTING AND SET-UP PROCEDURE

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PAGE

2 2 3

AIR AND LUBE

MAINTENANCE

DISASSEMBLY AND ASSEMBLY ..................................................

TOOL CROSS SECTION

ACCESSORIES

RECOMMENDED POWER INLET SYSTEM REMOTE CONTROL ClRCUlTlNG

TROUBLE SHOOTING ..................................................................

DIMENSIONAL DATA

For parts and service information, contact your local ARO distributor, or the Customer Service Dept. of the Ingersoll-Rand Distribution 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 l P.O. Box 8000 l Southern Pines, NC 28388-8000

REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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4 and 15

4 thru 10

12 thru 14

16 and 17

18 19

MODEL IDENTIFICATION

TABLE 2

The ARO@ model 8670-( ) self-feed drill is designed to automatitally feed to a pre-set depth, trip and return. The models 8670-( ) are available with either a 1 -1/2” or 3” stroke

RETRACT FEED CONTROL VALVE

The three basic sections of the model 8670-( ) are arranged for efficient maintenance. The following is a brief description of the sections and their functions.

VALVE SECTION

The valve section is composed of a spool valve, timing valve, reversing valve, manual start and manual retract valves, retract feed regulating valve and also houses remote start and remote retract ports, a depth signal and an auxiliary supply port.

The function of the 4-way spool valve is to port air to the piston for the forward and retract strokes.

length and in five (5) different spindle speeds. The combination of stroke lengths and free speeds appear as models above. The models 8670-( ) may be used in single unit or multiple unit applications.

TOOL RETRACTED SIGNAL PORT

UARY SUPPLY PORT

EMOTE RETRACT PC

ing valve can be adjusted so the unit retracts immediately upon completion of the drilling stroke or it can be adjusted to delay the retract stroke anywhere in the range from 0 to approximately seven (7) seconds.

The function of the reversing valve is to port air to the spool valve, causing it to shift to the retract stroke position at the completion of the timing cycle.

The drilling stroke is started by manually actuating the start valve, located at top of valve housing. The unit will advance the drill to a pre-set depth and automatically retract to the initial position, whereupon the unit will stop with all air to the unit shut off.

The function of the timing valve is to regulate the time lapse be-

tween the end of the drilling stroke and the retract stroke. The tim2

The unit may be shifted to the retract stroke at any time during the drilling cycle by manually depressing the retract valve, located at

top of valve housing. The unit will immediately retract to the initial position, whereupon the unit will stop with all air to the unit shut off.

The needle type retract feed control valve regulates the flow of air from the piston, thus regulating the rate of retraction of the unit. The model 8670-( ) is furnished with a hydraulic check to control the rate of forward feed of the unit-see page 12 for set-up procedure.

SPECIAL NOTE: There are two needle valves (34617) contained

in the valve block. One needle valve is for the retract feed control.

The other needle valve [visible only after the removal of the name-

plate (45184)) should not be adjusted or removed. If this needle

valve should ever be removed, the correct assembled position is

-the top of the needle valve flush with the top of the valve block. The unit may be operated remotely thru the use of the start and

retract signal ports located in top of the valve housing, using recommended fittings, tubing and valves - see page 16.

The auxiliary supply port is pressurized whenever air is present at

the air inlet of the tool.

The depth signal port is momentarily pressurized at the comple-

tion of the forward feed stroke when the retract valve (44981) is actuated and can be used to activate a remote valve for the purpose of starting another tool or an accessory function.

M105

The tool retracted signal port is located in rear of piston rod (44928-). The port is pressurized when motor starts and remains pressurized during the drilling cycle, until motor shuts off when unit is fully retracted. The valve section can be easily removed from tool for servicing and replaced with a spare unit, eliminating excessive down-time of tool. See page 4 for removal instructions.

MOTOR AND GEARING SECTION

The motor and gearing section has been designed into a single unit that can be easily removed from tool and replaced with a spare unit while it is being serviced or repaired, eliminating excessive down-time of tool. See page 4 for removal from tool.

HOUSING AND VALVE SECTION

The housing and valve section consists of a main housing, which

houses the piston section and motor and gearing section, and the valve housing, which houses the retract valve that is actuated by the adjustment screw contained in the trip bracket. The retract valve components are accessible by removing striker plate

(44987) from rear of valve housing. The piston and components are accessible by separating the main housing from the

housing. See page 4 for disassembly procedure.

valve

MOUNTING

The nose end of tool housing is provided with 2-7/8”-16 I.h. threads and a 2.873” x 2-1/4” long pilot diameter for fixture mounting. A foot type mounting bracket and nose housing are available

SET-UP PROCEDURE

At the time the model 8670-( ) self-feed drill is set up for operation, a minimum distance of 1/4” must be maintained between the work piece and the point of the drill bit, with the drilling unit in the fully retracted position. This will allow the air motor to start and

reach free speed before the drill reaches the work piece.

STROKE ADJUSTMENT

Determine the total stroke length the drill must travel to perform the drilling operation (see figure 1). Adjust the length of the stroke by loosening the two cap screws (Y99-42) which secure the trip bracket to the piston rod. Position the trip bracket on the piston rod so the distance between the trip bracket and the striker plate is somewhat greater than the desired stroke length and tighten the two screws (Y99-42), securing trip bracket on piston rod. Next, rotate adjustment screw (Y157-64) so the distance between the leading edge of the screw and the striker plate equals the desired total stroke length. A final adjustment of the adjustment screw can be made while testing the drilling operation on a few scrap work pieces to insure desired drilling depth is obtained.

as accessory items for tool mounting (see accessories section). The tool can be mounted in any position desired without impairing

the function of the tool (see set-up procedure).

FEED CONTROL VALVES

The models 8670-( ) are shipped from the factory with the retract

feed regulating valve set at a fairly slow rate of feed. Turn valve

counterclockwise to increase rate of feed. Turn valve clockwise to

decrease rate of feed.

TIMING VALVES (59231 METERING NEEDLE)

The timing valve (59231 metering needle), located at the rear of

the valve section, is used to regulate the time lapse between the

time the drill bit has reached the pm-set drilling depth and the time

the unit retracts. The timing valve can be adjusted so the unit will

retract immediately, up thru a range of approximately seven se-

conds (0 - 7 seconds). Turn the timing valve clockwise (in) to in-

crease the time delay. Turn the valve counterclockwise (out) to decrease the time delay.

NOTE: A final adjustment of the adjusting screw (Y157-64) may be necessary after adjusting the timing valve to insure precise depth of drilling operation.

RETRACT VALVE

ADJUSTMENT SCREW

TOTAL STROKE LENGTH

AIR AND LUBE REQUIREMENTS

Air pressure of 90 p.s.i.g. (6 bar) at the air inlet of the tool is required for maximum motor efficiency. If necessary, an air regulator should be installed to maintain this pressure when tool is in operation.

Filtered and oiled air will allow the tool to operate more efficiently

and yield a longer life to operating parts and mechanisms. A line filter capable of filtering particles larger than 50 microns should be used with a line oiler.

Filter-Regulator-Lubricator (F-R-L) assembly model RECOMMENDED LUBRICANTS: Spindle oil 29665, 1 qt. (.9 liter) C28241-810 is recommended for use with this air tool. The ca- container for oiler and air inlet; Grease 33153, 5 lb. (2.3 kg) can for pacity of the individual filter-lubricator is adequate to provide gears and bearings; “0” ring lubricant 36460, 4 oz. (113 g) tube for clean (40 micron) oiled and regulated air for the tool. lubrication and installation of “0” rings.

Inject 33153 grease (3 to 4 strokes) thru grease fitting located at top of main housing after each 160 hours of operation, or as experience indicates, for lubrication of gearing and spindle bearings.

NOTE: Be sure tool is in the fully retracted position when injecting grease thru fitting. CAUTION: An excessive amount of lubricant in a tool will affect the speed and power.

RECOMMENDED HOSE SIZE: 1/2” (13 mm) nominal inside diameter.

MAINTENANCE

Air tools are made of precision parts and should be handled with reasonable care when servicing. Excessive pressure exerted by a holding device may cause distortion of a part. Apply pressure evenly when disassembling (or assembling) parts which have a press fit. When removing or installing bearings, apply pressure to the bearing race that will be press fit to the mating part; if this is not practiced, Brinelling of the bearing races will occur, making replacement necessary. It is important that the correct tools and fixtures are used when servicing this air tool.

Disassembly should be done on a clean work bench with a clean cloth spread to prevent the loss of small parts. After disassembly is completed, all parts should be thoroughly washed in a clean solvent, blown dry with air and inspected for wear levels, abuse and contamination.

Double sealed or shielded bearings should never be placed in

solvent unless a good method of relubricating the bearing is available. Open bearings may be washed but should not be allowed to spin while being blown dry. When replacement parts are necessary, consult drawing containing the part for identification.

Before reassembling, lubricate parts where required. Use 33153 grease, or equivalent, in bearings. Use 36460 lubricant for “0 ring assembly. When assembling “0” rings, care must be exercised to prevent damage to the rubber sealing surfaces. A small amount of grease will usually hold steel balls and other small parts in place while assembling.

When ordering parts, be sure to list part number, part name, model number and serial number of tool. Use only genuine ARO© replacement parts.

DISASSEMBLY AND ASSEMBLY OF TOOLS

Disconnect air supply from tool or shut off air supply and drain line of compressed air before performing maintenance or service to tool.

Before starting to disassemble or assemble this tool (any part or

completely), be sure to read “Maintenance” section. To minimize the possibility of parts damage and for convenience,

the steps for disassembly or assembly listed on the following pages are recommended.

The basic sections and instructions for removing them from the tool are as follows:

VALVE SECTION

First, disconnect tubing from ports if any is being used. Remove five screws (Y211-109) with washers (Y14-10), and lift valve section (45174) off valve housing (44919). For disassembly of

valve section, see page 8.

MOTOR AND GEARING SECTION

Loosen four screws (Y211-102) and remove control cover (44947) off rear of tool. Using a wrench on flats at end of piston rod

(44928-), unthread piston rod from nut (44988) which secures piston rod to motor and gearing section. Do not attempt to remove piston rod from housing at this time. The main housing and valve housing must be separated for removal of rod (see “Housing and Valve” section). Next, remove screw (Y 154-31) and remove mo-

tor and gearing section from main housing and key (44929-2). For disassembly of gearing, see pages 6 and 7. For disassembly of motor, see page 8.

HOUSING AND VALVE SECTION

To remove piston rod (44928- ) and to gain access to piston (44985), loosen four screws (Y211-1 02) and remove control cover (44947). Loosen two screws (Y99-42) and slip trip bracket (44909) off end of piston rod. Unthread piston rod (44928-) from nut (44988) using a wrench on flats at rear end of rod. Main housing and valve housing must be separated before rod can be removed. Remove four screws (Y99-42) with washers (30997) and separate valve housing (44919) from main housing (44989). Use reasonable care when removing valve housing off piston rod so as not to damage rod or components in valve housing. The retract valve (44981) and components are accessible after removing control cover, trip bracket, three screws (Y211-102) and washers (Y14-10) and striker plate (44987). See page 10 for

complete disassembly.

M105

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44957

NAMEPLATE FOR NON-EU MODELS

44957-EU FOR “-EU” MODELS

PARTS MARKED THUS - ARE INCLUDED IN SERVICE KIT NUMBER 45832, SEE PAGE 20.

DISASSEMBLY

GEARING SECTION

a. Secure motor housing (45168) in a suitable holding device

and remove chuck, bearing lock nut (45158) and bearing lock screw (45159). Grasp end of spindle and pull gearing assembly from housing. NOTE: If gearing or motor assemblies do not slip freely from housing, a rod or similar tool can be inserted thru rear of motor housing and motor and gearing assemblies pushed out thru front end of housing. Reasonable caution should be exercised in doing this so as not to cause damage to nut (45189) or threads of nut (44988). Push on rod, do not hammer. Motor housing and head end of housing are pinned together at assembly - do not remove.

b. Grasp ring gear housing in one hand and tap threaded end of

spindle with a soft face hammer; spindle and components will loosen from ring gear housing.

c. To remove gears from spindle: rotate snap ring so open por-

tion of ring aligns with one shaft. Remove shaft, releasing gear. Repeat for removal of opposite shaft and gear.

ASSEMBLY

a. Assembly of gearing will be the reverse of disassembly proce-

dure. Pack bearings and lubricate gears liberally with ARO 33153 grease, or equivalent, when assembling. After assembling gears and shafts to spindle, rotate open portion of snap ring 60° from either shaft, securing shafts in spindle. Each gearing assembly should contain approximately 1/4 oz. of

grease. Spindle assembly (45167) - pack bearings.

b. See “Motor Assembly” - paragraphs h, i and j.

~- 44994-2 SHAFT (3)

45162 RING GEAR HOUSING

+ 14 hidden pages