Central Machinery 05907 Quick reference guide

30” SHEAR BRAKE ROLL
Model 05907
Assembly & Operating Instructions
3491 Mission Oaks Blvd. / Camarillo, CA 93011
Copyright 1997 by Harbor Freight Tools®. All rights reserved. No portion of this
manual or any artwork contained herein may be reproduced in any shape or form without
the express written consent of Harbor Freight Tools.
For technical questions and replacement parts, please call 1-800-444-3353.
®

SAVE THIS MANUAL
You will need this manual for the safety instructions,
assembly and operating instructions and parts list.
Put it in a safe, dry place for future reference. Keep
your invoice with this manual. Write the invoice
number on the inside front cover.
SPECIFICATIONS
Characteristic Value
Measurements 40” x 14 1/2” x 23 1/2”
Weight 297 lb.
Maximum Work Piece Width 30”
Maximum Work Piece Thickness 20 Gauge
SAFETY WARNINGS & CAUTIONS
1. KEEP WORK AREA CLEAN. Cluttered areas invite injuries.
2. KEEP CHILDREN AWAY. All children should be kept away from the work area. Don’t
let them handle the tool.
3. DO NOT OPERATE THE TOOL IF UNDER THE INFLUENCE OF ALCOHOL OR
DRUGS. Read warning labels on prescriptions to determine if your judgment or reflexes
are impaired while taking drugs. If there is any doubt, do not attempt to operate.
4. AVOID MOVING PARTS DURING OPERATION. Keep fingers and hands away from all
moving parts.
5. USE EYE PROTECTION. Wear ANSI approved impact safety goggles. Goggles are
available from Harbor Freight Tools.
6. DRESS SAFELY. Protective, gloves and non-skid footwear or safety shoes are recom-
mended when working with and operating the tool. Don’t wear loose clothing or jewelry.
They can get caught in moving parts. Also, wear a protective hair covering to prevent
long hair from getting caught in the tool.
7. DON’T OVERREACH. Keep proper footing and balance at all times.
8. STAY ALERT. Watch what you are doing. Use common sense. Do not operate any
tool when you are tired.
9. REPLACEMENT PARTS AND ACCESSORIES. When servicing, use only identical
replacement parts. Only use accessories intended for use with this tool. Approved
accessories are available from Harbor Freight Tools.
10. STORE IDLE EQUIPMENT. When not in use, the tool should be stored in “closed”
position and in a dry location to reduce rust. For safety, keep out of reach of children.
READ ALL INSTRUCTIONS
BEFORE OPERATING THE
30” SHEAR BRAKE ROLL.
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ADJUSTMENT
Handle Removal and Adjustment
The HANDLE (#18) may be adjusted or moved by removing one of the handle knobs and loos-
ening the wing nut that holds the handle in place. It may then be slid out of the handle socket,
moved to the opposite side of the tool, and tightened in the most convenient position.
Bending Die Adjustment and Removal
The UPPER BRAKING DIE (#12) is segmented and can be used for varying sizes of box and
pan forming. When forming a smaller box or pan, choose the desired size UPPER DIE finger,
center it and remove the others. See below for adjustment instructions.
The SHEAR BRAKE ROLL can be used to bend sheet metal up to 20 gauge. The space
between the UPPER DIE and the MOVING CUTTER PLATE (#11) is adjustable. To adjust the
spacing, perform the following steps:
Step 1. Place a flat straight piece of wood between the UPPER BRAKING DIE and MOVING
CUTTER PLATE and raise the MOVING CUTTER PLATE so that the material just
touches the UPPER DIE as shown in Figure 1.
Figure 1 — Adjusting the Dies
Step 2. Loosen the HEX SCREWS (#53) holding the UPPER DIE fingers in place. It is not
necessary to remove them.
Adjusting Screw #61
Adjusting Screw #61
Upper Braking
Die #12
Moving Cutter Plate #11
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Step 3: Remove any unneeded UPPER DIE fingers.
Step 4. Raise and lower the MOVING CUTTER PLATE and use the block of wood to adjust the
alignment of the UPPER DIE fingers.
Step 5: Tighten the UPPER DIE HEX SCREWS.
Removal and Installation of Upper Cutting Blade
Step 1: Remove the HEX SCREWS (#56) from the upper cutting BLADE (#23) as shown in
Figure 2.
Figure 2 — Upper Blade Removal
Step 2: Remove the upper cutting BLADE.
Step 3: Align the upper cutting BLADE so that it is flush with the MOVING CUTTER PLATE
(#11) and secure with its SCREWS.
Adjustment of Upper Blade
Step 1: Place a 30” piece of thin cardboard or paper between the UPPER and LOWER
BLADES (#23).
Step 2: Rotate the HANDLE (#18) and cut the material.
Step 3: Use a straightedge to determine the straightness of the cut and if the BLADE is in need
of adjustment.
#56
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Step 4: If the BLADE is bowed out, away
from the front of the tool, turn the
adjustment NUT (#49) counterclock-
wise (see Figure 3). This will tighten
the SUPPORTING PLATE (#22) and
push the middle of the UPPER
BLADE (#23) out while pulling its
ends in.
Step 5: If the BLADE is bowed in, towards
the back of the tool, turn the adjust-
ment NUT clockwise (see Figure 3).
This will loosen the SUPPORTING
PLATE and pull the middle of the
UPPER BLADE in while pushing
its ends out.
Removal and Installation of Lower Blade
Step 1: Remove the HEX SCREWS (#59) from the lower cutting BLADE (#23) as shown in
Figure 4.
Figure 4 — Removal and Installation of Lower Blade
Step 2: Remove the lower cutting BLADE (#23).
Step 3: Replace the lower cutting BLADE and secure using its HEX SCREWS.
Figure 3 — Upper Blade Alignment
Nut
#49
#59
#59
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Adjustment of Lower Cutting Blade
Step 1: Lower the upper BLADE (#23) to its lowest position.
Step 2: Loosen the two inset HEX SCREWS (#59) located on top of the WORK TABLE (#2) as
shown in Figure 4.
Step 3: Adjust the lower cutting BLADE by turning its ADJUSTMENT SCREWS (#61) as
shown in the Parts Diagram on page 13. The distance between the lower cutting
BLADE and the upper cutting BLADE should be 5 to 8 percent of the thickness of the
workpiece.
Step 4: Tighten the two inset HEX SCREWS (#59) located on top of the cutting blade.
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OPERATION
Shearing
Step 1: Scribe the cutting mark on the material.
Step 2: Slide the material between the upper BLADE (#23) and the lower BLADE (#23) so that
the upper BLADE is positioned directly above the mark and the right hand side of the
material rests against the GUIDE (#16) as shown in Figure 5.
Figure 5 — Shearing
Step 3: While holding the material steady, rotate the HANDLE until the material has been cut.
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Angle Bending
Step 1. Mark the work piece where you want to bend the material.
Step 2. Place material above the MOVING CUTTER PLATE (#11) as shown in Figure 6.
Figure 6 — Angle Bending
Step 3. Align the bending mark with the front edge of the UPPER DIE.
Step 4. Rotate the HANDLE (#18) until the desired angle has been formed. Use a protractor or
other measuring tool to ensure accuracy.
Upper Braking
Die #12
Moving Cutter
Pate #11
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Radius Bending
Radius bending is most commonly used to make cylinders and cones, as shown in Figure 7.
Both shapes are formed by making a series of small, closely spaced bends in the work piece.
Figure 7 — Radius Bending
For cylinders, the bends are evenly spaced, i.e. every bend is identical.
For Cones, simply move one side of your stock out further than the other every time you make a
bend.
Pan Forming
The Hand Brake Roll can be used to make various sizes of pans. The maximum lip (side) height
supported by this tool is 1”.
To form a pan:
Step 1. Pre-measure and cut your material before bending. Notch the corners according to the
desired lip height as shown in Figure 8.
Step 2. Insert material between the UPPER BRAKING DIE (#12) and the MOVING CUTTER
PLATE (#11). Bend the material until as 90 degree angle has been formed.
Step 3. Rotate the material 90º counterclockwise. Allow the completed side to extend just
beyond the dies. Bend the second side.
Step 4. Repeat Step 3 for the third side.
Step 5. Rotate to the final side, and insert work piece between the dies. Your formed sides will
be on the outside of the dies.
Step 6. Before bending, tap one corner nearer to the middle of the machine. This will allow the
material to clear the UPPER BRAKING DIE when raised.
Work
Bench
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Step 7. Bend the fourth side.
Step 8. Using a block or piece of wood, tap the corner of material back into place.
plaplace.
Figure 8 — Pan Forming
Rolling
Step 1:Move the COVER (#33) back and out of the way.
Step 2:Drop the BACK PRESSING ROLL (#24) by loosening the SCREW (#25).
Step 3:Insert just the leading edge of your workpiece between the UPPER PRESSING ROLL
(#32) and LOWER PRESSING ROLL (#31), and tighten the roll bar gap ADJUSTABLE
BOLT (#27) until the ROLL BARS are barely snug against the workpiece.
Step 4:Advance the SCREW (#25) as much as desired depending upon the tightness of the roll
to be accomplish. (The tighter the roll, the more the knobs must be advanced.)
Step 5:Crank the HANDLE ASSEMBLY (#18 & 26) until the proper roll has been achieved. The
material should feed itself through the rollers as you crank the HANDLE ASSEMBLY.
Step 2: Bend Second Side
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