SET-UP PROCEDURE

M104

32

The following items must be given proper consideration to cor- rectly apply the ARO Lead Screw Tapper.

1.Accuracy of positioning the tapdrilled hole with the tapper (X, Y and Z axis).

2.Speed at which the material should be tapped (S.F.M., see

CAUTION: If the tool is mounted in a vertical or near vertical posi- tion, block the chuck end of drive spindle to prevent the spindle from dropping down when lead screw and nut are removed. Re- move two (2) set screws (45445) from lead screw (41258-).

page 29)

3.Size and diameter variation of the hole to be tapped (% of ef- fective thread height).

4.Length - diameter - pitch ratio of thru or blind hole -chip size - amount of chips -compaction of chips in hole bottom - chip load on flutes.

5.Coolant or no coolant used -chip flushing and friction of tap to material (see page 29).

6.Cutting face angle of tap per material (see page 29).

Under favorable conditions, the rated capacity of a given model tapper may be exceeded.

Where the position of the tap drilled hole is held reasonably close with the tapper (X -Y position), the standard tap chuck is recom- mended for the application.

Where the X - Y position of the tap drilled hole varies too greatly to maintain proper cutting conditions, a floating Collet holder is rec- ommended. The Collet holder has floating capability of .030” T.I.R. parallel float to compensate for hole shift. This floating holder will also compensate for about .004” maximum hole angularity. Float- ing holder and colltets used with holders are listed under “ACCES- SORIES”, page 22.

It is essential, during the operation of the unit, to have the stroke adjustment cover door (nameplate) closed to prevent contamina- tion entry (cutting oil, chips, etc.) into the spindle sleeve area. Coolant or cutting oil flow should never be directed to the region of the cover door.

Lead screw and nut may be changed without disturbing any other section of the tool. Disconnect tool from air supply or shut off air supply to tool and exhaust (drain) air line to tool of compressed air before continuing further. Disconnect tubing from sensor valve ports. Remove three (3) screws (Y154-53) and washers (Y14-10), housing (45443) spring (49533) and spacer (44848). Using a wrench on flats at rear of shaft (40516-1), rotate shaft clockwise, advancing drive spindle approximately 1/4”, or until trip bracket (41235) is no longer in contact with trip tab (40523-1).

NOTE: Small end of tapered hole in shaft (40516-1) is identified by an “X”stamped on one side of flats at end of shaft. Insert a punch thru lead screw at side identified with “X”and lightly tap punch to remove taper pin (45446). After removal of taper pin, pull on lead screw to remove lead screw and nut assembly (45453-).

REASSEMBLY

Assemble lead screw and nut assembly to shaft (40516-1), align- ing holes in lead screw with tapered hole in shaft. Assemble taper pin (45446) - small end first -thru lead screw and shaft from the side opposite the “X” identification mark on the shaft and as- semble one set screw (45445) into the same hole in lead screw, tightening the set screw against taper pin, forcing the pin into lock position. Torque the set screw to 40 in. Ibs. Assemble the other set screw (45445) in the opposite side of lead screw and torque to 35 in. Ibs.

Remove block from chuck end of spindle if used, and rotate shaft (40516-1) if necessary to insure lead screw nut is properly posi- tioned into housing (40508-2), slot in lead nut aligned with dowel pin in housing. Insure lead screw and nut area contains proper amount of grease (see “Airand Lube Requirements”, page 6) as- semble spacer (44848), spring (49533) and housing assembly (45452) and adjustment nut (45444) and secure with washers (Y14-10) and screws (Y154-53).

LEAD NUT TENSION ADJUSTMENT

Remove pipe plug located at the side of lead screw housing (40508-2). Set trip tabs so the unit will cycle with a minimum of 1” stroke length. Operate the unit and, using an allen type wrench, slowly tighten adjustment screw until load is noted on motor (mo- tor noise decreases slightly).

Remote control of start and retract functions is achieved by introducing air pressure into the proper remote control port (see pages 2 and 19). The unit is equipped with built-in check valves to assure free flow to the tool but checks the signal from leaving the tool thru the remote control line.

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Ingersoll-Rand 8657-B()-(), 8656-B()-(), 8655-B()-(), 8658-B()-() and 8659-B()-() Reassembly, Lead NUT Tension Adjustment
Page 4 Page 6

8655-B()-(), 8657-B()-(), 8656-B()-(), 8658-B()-() and 8659-B()-() specifications

The Ingersoll-Rand 8658-B(), 8659-B(), 8656-B(), 8657-B(), and 8655-B() series are advanced air compressors designed to meet a wide range of industrial needs. Renowned for their reliability, efficiency, and robust performance, these models are equipped with state-of-the-art technologies that make them suitable for various applications, including manufacturing, automotive, and construction industries.

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