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WARNINGS
• Always read tool manual before operating.
• Always wear safety glasses while operating or
while in the vicinity of a tool in operation.
• For testing, always cycle tool away from work
to insure proper ring closure. For safety
reasons, an improperly functioning tool must
not be used. When operating tool, never point
or actuate tool other than into work.
• Operate tool in an unobstructed work area.
• Disconnect air supply prior to servicing,
maintenance/repairs and when tool is not in use.
• Use clean dry air to maximize efficiency. Do
Not Exceed 105 P.S.I. (7.2 bars)
• Do not use bottled gases such as oxygen,
hydrogen, carbon dioxide, acetylene, etc.
• Tools shall be operated with a fitting or hose
coupling on or near the tool in such a manner
that all compressed air in the tool is discharged
at the time the fitting or hose coupling is
disconnected. Use ¼-18 NPT or equivalent
fitting when connecting to the tool.
PNEUMATIC C-RING TOOL
SC50T
SAFETY INSTRUCTIONS
WARNING:
The employer and/or user must ensure that proper eye
protection is worn. Eye protection equipment must
conform to the requirements of the American National
Standard Institute, ANSI Z87.1-1989 and provide
frontal and side protection. Eye protection shall be
worn by the operator and others in the work area when
loading, operating, or servicing this tool. Eye
protection is required to guard against possible flying
particles and/or debris, which could cause severe eye
injury.
NOTE: Non-side shielded prescription glasses and
faceshields alone do not provide adequate protection.
OPERATION
Always handle tool with care:
• Never engage in horseplay.
• Never pull the trigger unless nose of tool is
directed toward the work.
• Keep others at a safe distance from the tool while
the tool is in operation as actuation occurs,
possibly causing injury. Keep hands and body
away from the jaw mechanism of the tool.
LOADING TOOL
When loading tool:
• Never place a hand or any part of body in jaw
mechanism area of tool.
• Never point tool at anyone.
• Never actuate tool when loading, accidental injury
may occur.
AIR CONSUMPTION
SC50T Tool require 10.4 cubic feet per minute (.293
cubic meters per minute) of free air to operate at a rate
of 100 cycles per minute, at 100 P.S.I. (6.9 bars).
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TO DISASSEMBLE
Jaws, magazine and pusher assembly
1. Remove flexloc nuts, washers, support plate, latch spring
and jaw bolts (#35, #34, #68, #37 and #61).
2. Remove buttom head socket cap screw (#67) and lock
washer (#66) from feeder arm (#65).
3. Magazine assembly (#62) and spring bracket assembly
(#58) may now be removed.
4. Drive out jaw bushings (#32) and remove jaws (#31 and
#41).
5. Remove (2) flexlock nuts (#72) from studs (#16) at rear of
tool and remove feeder arm bracket (#65).
Feeder blade, rollers, piston rod
1. Remove button head screw and washer (#51 and #50) from
trigger guard and (4) cap screws with lock washers (#30 and
#29) in front end assembly (with piston) from cylinder
housing.
2. Remove piston (#24), o-ring (#22), flexlock nut (#23)
piston stop spacer assembly (#26), piston rod assembly with
piston rod (#43), feeder blade (#40), (2) roller pins (#42)
and (4) rollers (#39) from the front end assembly.
Throttle
1. Loosen set screws (#19) on both ends. Do not loosen
center set screw #19.
2. Do not remove throttle valve bushing (#15), location is
pre-set at Spenax.
3. Remove air deflector parts (#1, #2, #3 and #4).
4. Remove rear valve seat (#5).
5. Remove throttle spring and locator parts (#7 and #8).
6. Remove front valve seat (#48) and throttle stem (#47) using
a 3/16” wrench.
7. Using two 9/64” Allen wrenches, unscrew throttle valve
screws (#9) to remove valve units. Hint: Hold tool so that
the valve is vertical to help prevent loosing parts.
8. One valve screw will remain with other valve parts on
spacer (#14), and can be disassembled after removal from
housing.
TO RE-ASSEMBLE
1. Assemble one side of the o-ring support assembly (#9, #10,
#11, #12, #13, #12, and #11) on spacer (#14). The chamfer
on both washers (#10) should be installed, with chamfer
side against cap screw head (#9).
2. Hold tool vertically and install o-ring support assembly with
spacer into bushing from the top.
3. Holding cap screw with an Allen wrench, bring second oring support assembly (mounted on screw (#9)) in from the
opposite side and complete valve assembly. The valve
should have free motion of travel of about 3/32”
[.09”(2.3mm)].
4. Insert valve spring locator and spring (#8 and #7) into the
rear of the valve.
5. Screw rear valve seat with lubricated o-ring (#5 and #6) into
rear of the valve port.
6. Insert throttle stem (#47) into front valve seat (#48) and
slowly screw front valve seat with lubricated o-ring (#6)
into front of the valve port. (See Throttle Valve
Adjustment).
7. Assemble piston stop spacer assembly (#26), piston (#24),
piston rod (#43) and nylock nut (#23) together. Be careful
not to damage o-ring (#21) when pushing stop spacer onto
piston rod, use lubrication. Place piston so that the
extended neck is opposite the nylock nut. Nylock nut at rear
of piston must be Loctited into place (Loctite #242 or
equivalent). Place o-ring (#22) onto piston.
8. Mount feeder blade (#40) and two roller pins (#42) on
piston rod (#43).
9. Place (4) rollers (#39) on the (2) roller pins (#42).
Lubrication will hold the rollers in place while assembling
the rest of the tool.
10. Mount latch (#38) onto side plate (#28R) with latch pin clip
(#36).
11. Assemble trigger, (2) spacers and trigger guard (#44, #33
and #49) to the side plates with (3) roll pins (#45).
12. Mount side plate assembly (#28R, #28L, #44, #33 and #49)
over stop spacer assembly.
13. Place cylinder gasket (#25) between the stop spacer and the
housing.
14. Insert front end assembly into the cylinder housing. Be
careful not to damage o-ring (#22) when pushing piston into
the cylinder bore, use lubrication.
15. Secure front end assembly with (4) lock washers and cap
screws (#29 and #30).
16. Leave trigger guard loose for adjusting the valve. See
throttle valve adjustment procedure for proper valve
adjustment instructions.
17. Mount feeder arm (#65) onto the studs at rear of the
cylinder housing with two nylock nuts (#72).
18. Place spring bracket assembly (#58) between magazine
assembly (#62) and side plate (#28L). If unassembled see
Pusher Spring Installation Procedure.
19. Attach the magazine assembly (#62) to the feeder arm (#65)
with lock washer and button head cap screw (#66 and #67).
But do not tighten completely.
20. Place jaws (#31 and #41) between the side plates (#28R and
#28L).
21. Install (2) jaw bushings (#32) through side plate, jaws and
side plate (#28R, #31, #41 and #28L). Lubricate both jaws
and bushings before installing them.
22. Place (1) .030” magazine shim (#60A) and (1) .010”
magazine shim (#60C) under the foot of magazine (#62),
between magazine and side plate. Other shims may be
added or subtracted to get the proper drop in the magazine
shoe (See Installation Procedure/Adjustments).
23. Insert (2) jaw bolts (#61) through magazine, shims, spring
spool bracket, side plate, jaw bushing, side plate, latch
spring (#37), support plate (#68) and (2) washers (#34).
Secure jaw bolts with (2) nylock nuts (#35). Do not over
tighten jaw bolts, jaws must still pivot freely.
24. Tighten button head cap screw (#67)
25. After all adjustments to the tool are made, the trigger guard
is secured with button head screw and washer (#51 and
#50).
INSTALLATION PROCEDURE / ADJUSTMENTS
Magazine
1. Before tightening jaw bolts (#61), insert approximately
.040” of shims.
2. Tighten bolts and check shoe (#70) for proper fit. Shoe
should have approximately .020”(.50mm) float up and
down.
3. When shimmed correctly, and with the feeder blade in the
forward position, the shoe will be approximately in the
center of the available amount of travel.
4. Cycle tool and check for proper closure of ring. If feeder
blade hits rear of shoe, add another shim. Shims (#60A &
B) are available in two thickness’ of .030”(.762mm) and
.010”(.25mm).
5. When the tool is completely re-assembled, check to insure
that magazine (#62) is parallel to housing (#17).
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INSTALLATION PROCEDURE / ADJUSTMENTS
(cont.)
Pusher Spring
1. Attach spring (#63) in uncoiled position to pusher (#55)
using roll pin (#64).
2. Insert slotted spring bolt (#57) through spring spool bracket.
3. Align spring end with hole in spring spool bracket and pass
end of spring through bolt slot.
4. Pull pusher to the end of the magazine and clamp spring.
5. Using an Allen wrench, turn slotted bolt to wind spring
until coil is completely tight.
6. Tighten spring bolt and Flexlock nut.
Throttle valve
Follow these steps after completing tool assembly in order to
minimize the time and effort required for optimum throttle valve
adjustment:
1. Using the valve stem, slowly screw in the front valve seat
(#48) until it bottoms, then back it out 1-1/2 turns.
2. Do the same with the rear valve seat (#5).
3. Attach an air line and fully depress the trigger. AIR
SHOULD LEAK OUT THE REAR VALVE SEAT. While
depressing the trigger, slowly turn in the rear valve seat
(#5) until the air stops leaking.
4. Release the trigger. AIR SHOULD LEAK OUT OF THE
HANDLE. Place a 3/16 wrench on the trigger valve stem
(#47) and turn the front valve seat (#48) in slowly until the
air stops leaking from the handle.
5. Gently depress the trigger. Air should flow evenly from the
rear exhaust to the handle exhaust.
6. The valve should now be adjusted - test the tool
7. Tighten the front and rear valve seat locking set screws
(#19) and re-test the tool.
8. Do not loosen or tighten center locking set screw (#19) it
is pre-set from Spenax.
9. Do not screw set screw (#1) in too far or it will result in the
tool running sluggish by restricting the air flow.
TOOL LEAKS AIR OR IS SLUGGISH
1. If tool is leaking air in the throttle area, see “Throttle Valve
Adjustment” section.
2. Should the tool leak air in both the triggered and rest
positions, a damaged piston o-ring may be the cause. Once
the piston o-ring has been replaced, lubricate with lithium
grease. Tilt the front of the tool to one side to allow the oring on the piston to pass the notch on the cylinder liner. If
this procedure is not followed, the o-ring may be damaged
during the insertion of the piston assembly into the cylinder
housing.
3. If the tool still continues to leak, the liner may be leaking
between the housing. The tool should be sent back to
Spenax for repair.
4. In the event the rear throttle valve screw is turned in too far,
the tool will operate slowly or in a sluggish manner during
the opening/loading sequence. This screw controls the
amount of rear exhaust. When properly adjusted, two or
three threads should be exposed once the nut and washer are
in place.
LUBRICATION
1. The “SC” series Flex-C tools are designed for long, troublefree service with minimal air line lubrication. (If an in-line
lubricator is used, it should be set at the minimum rate of
flow.)
2. Excess oil in the tool will attract dirt, lint, and the adhesive
material used in collating the fasteners, preventing smooth
operation. When lubrication is used, always use a good
grade of 5W non-detergent oil with no additives.
3. When servicing or repairing tool use lithium grease on all
moving parts.
FILTER AND REGULATOR
1. The air line should always contain a filter and regulator unit
to provide the tool with a constant flow of clean, dry air. If
moisture and contaminates are allowed to enter the tool, the
tool’s serviceable life will be decreased.
2. The regulator should be set between 100 and 105 psi. (6.90
- 7.24 bar). Never operate this tool beyond 115 psi. (7.93
bar).
TIPS ON EXTENDING TOOL LIFE
The serviceable life of the “SC” series tools can be extended
greatly by using the following guidelines:
1. Always use Stanley Spenax brand fasteners. Never replace
worn or broken parts with anything other than genuine
Stanley Spenax parts. Generic fasteners may shorten the
life of your Flex-C tool and will void the manufacturer’s
warranty.
2. Keep your tool(s) clean and dry. Always use clean, dry air
and never exceed the recommended air pressure noted
above.
3. Use of this tool at minimum air pressure required for the
work at hand will greatly extend the life of the tool.
4. Exercise caution not to drop equipment. Tools dropping
onto the floor or ground is a primary reason for parts
replacement.
HELPFUL HINTS FOR FIELD SERVICE TOOL JAMS
1. The most common reason for jamming problems in the SC
tool is operator error. Because of the tool’s valve unit, the
trigger must be pulled completely to the rear to ensure
positive functioning of the valve. If the tool is “short
cycled,” the feed mechanism will return forward
prematurely in an attempt to pick up a second ring. This
will most likely cause a jam.
2. If a jam occurs, pull pusher back and remove remaining
rings from magazine. Point tool away from yourself and
others, and cycle tool slowly. This should force jammed
ring(s) out of jaw mechanism.
3. If procedure “2” does not clear the tool, disconnect air, lay
tool on a clean flat surface and remove top jaw bolt and nut,
and pull top jaw and bushing from tool. Jammed rings are
now exposed and may be removed from tool. Remove
build up of dirt, lint, and any other foreign debris and check
for worn or damaged parts. Re-assemble in reverse order.
4. Replace worn or damaged parts to keep tool operating
properly.
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SPECIFICATIONS AND TYPES OF MATERIALS AVAILABLE BY PART NUMBER
Part Number Per
Strip #
RING11RG40 40 1,600 Light Galvanized 0.120 1.53 1.10 .410 - .465
RING11AL40 40 1,600 Aluminum 0.120 1.53 1.10 .410 - .465
RING11G40 40 1,600 High Tensile Galvanized 0.120 1.53 1.10 .460 - .513
RING11SS40 40 1,600 High Tensile Stainless Steel 0.120 1.53 1.10 .425 - .495
Per
Box #
Material Wire
Diameter
Ring I.D. Ring Leg
Opening
Operating Range of
Tool SC50T
* Please specify “Blunt” or “Sharp” when ordering rings.
RING DOES NOT CLOSE COMPLETELY
1. Check air pressure. Line pressure at the tool should be between 100 and 105 psi (6.90 - 7.24 bar) for most applications. The tool should
never be operated at pressures exceeding 115 psi (7.93 bar).
1. A 3/8” (9.5 mm) or larger air line should be used with the “SC” Series Tools. Air lines in excess of 100’ (30.5 meters) in length can
cause air volume deficiencies at the tool which will prevent normal operation.
2. Check for foreign debris in the jaw area. This is especially true in the area between the side plates and rollers.
3. The jaws may be worn from extended use. Check the “land” between the receiving grooves of the jaws. If the land is worn excessively,
replacing the jaw(s) is recommended.
4. When the tool is used in corrosive applications, light oil should be applied on a regular basis to the jaw bushings and rollers.
Unlubricated and/or corroded jaw bushings may cause the tool to function poorly.
5. When ring teardrops, the latch is not backing the ring up properly. Replace or reshape latch spring to hold latch against the side plate.
The latch may also need replaced to get proper ring shape.
FEEDING PROBLEMS
1. If rings do not feed smoothly down the magazine, check pusher spring for proper tension. If the magazine is covered with dirt from field
use, clean the magazine and apply a light coating of oil.
1. When rings feed properly on the magazine but do not feed into the jaws without spitting out of the magazine side of the tool, or if the
rings sit in the jaw grooves on an angle, check jaws to insure freedom of movement. With the jaws void of rings, the vertical movement
should be approximately .09” (2.3 mm). The jaw bolt nuts should be snug, but never over-tightened.
2. After considerable use or several jams, the fingers on the pusher may show signs of spreading. This may cause the pusher to “hang up”
on the magazine, with little or no pressure behind the rings. The last few rings in the strip will not feed into the jaw mechanism. The
pusher fingers can be squeezed back into proper position or the pusher should be replaced. NEVER USE LOOSE RINGS IN THE SC
TOOL.
LIMITED WARRANTY
Stanley Fastening Systems warrants to the original retail purchaser that this product is free from defects in material and
workmanship, and agrees to repair or replace, at Stanley Fastening Systems’ option, any defective product within 60 days
from the date of purchase. This warranty is not transferable. It only covers damage resulting from defects in material or
workmanship, and it does not cover conditions or malfunctions resulting from normal wear, neglect, abuse, or accident.
THIS WARRANTY IS IN LIEU OF ALL OTHER EXPRESS WARRANTIES. ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE IS LIMITED TO THE DURATION OF THIS
WARRANTY. STANLEY FASTENING SYSTEMS SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR
CONSEQUENTIAL DAMAGES.
Some states do not allow limitations on how long an implied warranty lasts, or the exclusion or limitation of incidental or
consequential damages, so the above limitations or exclusions may not apply to you. This warranty gives you specific
legal rights, and you may also have other rights which vary from state to state.
To obtain warranty service, you must return the product at your expense together with the proof of purchase to a StanleyBostitch Regional warranty repair center or you may call us at 1-800-556-6696 or 1-800-832-3080 for the location of
additional authorized warranty service locations in your area.
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