MODEL 36A and 52A PNEUMATIC SHEARS

OPERATION, PARTS & MAINTENANCE MANUAL

6926 Smithville Hwy. McMinnville, TN 37110

Phone: 931-934-2211 • Fax: 931-934-2200

Email [email protected] www.tennsmith.com

Proudly Made in the USA

A Family Tradition Since 1928

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3

Model 36A and 52A Parts List

INDEX

NO. 36

1 10101 10151 TABLE

2

3

4

10102

52

10152

10103 10153

DESCRIPTION

CUTTER BAR

HOLDDOWN

10051 10051 R.H. SIDE PANEL

5 10052 10052 L.H. SIDE PANEL

6 10053 10053 FRONT ARM EXT.

7 05055 05055 SCREW, FRONT ARM EXT.

8 05673 05673 WASHER, FRONT ARM EXT.

9 10054 10054 SPRING, HOLDDOWN

10 10111 10164 STUD, HOLDDOWN SPRING

11 05880 05880 NUT, HOLDDOWN STUD

12 05907 05907 CAP NUT, HOLDDOWN STUD

13 05060 05060 SCREW, HOLDDOWN

14 05673 05673 WASHER, HOLDDOWN SCREW

17 10055 10055 SCALE, L.H. TABLE

18 10056 10056 SCALE, R.H. TABLE

19 05021 05021 SCREW, TABLE SCALE

20 05639 05639 WASHER, TABLE SCREW

21 05327 05327 SET SCREW, TABLE ADJ.

22 05035 05035 SCREW, TABLE LOCK

23 05670 05670 WASHER, TABLE LOCK SCREW

24 05075 05075 BOLT, TABLE

25 05676 05676 WASHER, TABLE BOLT

26 05925 05925 NUT, TABLE

27 10105 10155 KNIFE, UPPER

4 130

4 131

4 132

1 133

28 05033 05033 SCREW, UPPER KNIFE

29 05670 05670 WASHER, UPPER KNIFE

30 10106 10156 KNIFE, LOWER

31 05035 05035 SCREW, LOWER KNIFE

7/9

14/18

1

6/8

32 05670 05670 WASHER, LOWER KNIFE 12/16

33 05246 05246 SET SCREW, LOWER KNIFE ADJ. 6/8

34 05759 05759 NUT, LOWER KNIFE ADJ.

35 10064 10064 SHIM, C’BAR

36 05249 05249 SCREW, C’BAR SHIM

37 05762 05762 NUT, C’BAR SHIM SCREW LOCK

6/8

2

6

6

38 10107 10157 STRAIGHTENER ROD, C’BAR

39 05673 05673 WASHER, STRAIGHTENER ROD

1

3

40 05787 05787 NUT, STRAIGHTENER ROD 3

41 10112 10165 ADJ. SCREW, STRAIGHTENER ROD 1

44 05331 05331 SET SCREW, BACKGAUGE ROD 2

45 05331 05331 SET SCREW, HOLDDOWN LOCK

46 10302 10302 SPRING, FOOT PEDAL

47 15053 15053 SPRING GUIDE

48 15057 15057 CAP, SPRING

49 15055 15055 STUD, SPRING

50 05787 05787 NUT, SPRING STUD

51 10069 10069 LINKAGE BOLT, C’BAR

52 05827 05827 NUT, LINKAGE BOLT, C’BAR

54 05826 05826 NUT, STUD

55 10071 10071 TURNBUCKLE

57 06354 06354 PIN, LINKAGE, MOUNTING

62 10058 10058 ROD, BACKGAUGE

63 10110 10163 STOP, BACKGAUGE

64 10065 10065 R. EXT. BAR, BACKGAUGE

65 10066 10066 L. EXT. BAR, BACKGAUGE

QTY. NO.

1 99

1 100

1 101

1 114

1 114

2 115

4 115

4 116

2 117

2 118

2 119

2 120

2 121

2 122

1 123

1 124

4 125

4 126

2 127

2 128

4 129

66

67

70

71

76

77

78

10059

10060

10061

10074

05938

10063

10059

10060

10061

10074

05938

10063

ADJ. BLOCK, BACKGAUGE

ADJ. DIAL, BACKGAUGE

68 10075 10075 ADJ. SCREW, BACKGAUGE

69 05762 05762 NUT, ADJ. SCREW

“T”-NUT

BEVEL GAUGE

94 10304 10304 PIN, PEDAL BAR

WING NUT, “T”-NUT

80 10108 10158 BACKGAUGE ASSEMBLY

91 10302 10302 STUD

92 10303 10303 CLEVIS, FOOT PEDAL

93 05544 05544 PIN, FOOT PEDAL CLEVIS

98 10255 10305 GUARD PANEL, FRONT

LOCK SCREW, BACKGAUGE

10062 10062 ADJ. BRKT. BACKGAUGE

72 05027 05027 SCREW, EXT. BAR

73 05325 05325 SWIVEL BOLT

74 10109 05765 NUT, SWIVEL BOLT

75 10159 10159 STOP, FRONT MATERIAL

3

3

1

1

2

2

2

2

1

2

2

2

2

4

2

2

3

2

1

2

2

2

4

2

8

2

2

8

2

2

2

1

1

1

36 52 DESCRIPTION QTY.

05545 05545 SCREW, FRONT GUARD PANEL 6

10256 10306 GUARD PANEL, REAR

05546 05546 SCREW, REAR GUARD PANEL

1

4

70707 AIR CYLINDER

70708

70707 AIR CYLINDER

CLEVIS, CYLINDER

1

2

2

70708 CLEVIS, CYLINDER

70709 70709 PIN, CYLINDER

70710 70710 CYLINDER CORD ASSEMBLY

10260 10310 CYLINDER BRKT.

05500 05550 ADJ. SCREW, CYLINDER BRKT.

70711 70711 FOUR WAY VALVE

70712 70712 OILER

70713 70713 AIR REGULATOR

70714 70714 MUFFLER

70715 70715 AIR PRESSURE GAUGE

4

2/4

1

1/2

2/4

1

1

1

1

1

05551 05551 SCREW, VALVE MOUNTING

05552 05552 WASHER, VALVE MOUNTING

05553 05553 NUT, VALVE MOUNTING

10311 10311 MOUNTING BRKT.

05554 05554 SCREW, MOUNTING

05555 05555 WASHER, MOUNTING 2

70716 70716 AIR FOOT SWITCH COVER PLATE 1

70717 70717 FOOT SWITCH CORD ASSEMBLY

10262 10312 FOOT PEDAL ASSEMBLY

1

1

3

3

3

1

2

4

FOREWORD

This manual has been prepared for the owner and operators of the TENNSMITH Model 36A and 52A Shears.

Its purpose, aside from operation instruction, is to promote safety through the use of accepted operating procedures.

Read all instructions thoroughly before operating your shear.

Also contained in this manual is the parts list for your shear. It is recommended that only TENNSMITH factory authorized parts be used for replacement parts.

WARRANTY

Your shear has a three year limited warranty from the date of purchase. The terms of the warranty are stated on the warranty registration card shipped with your machine. Please complete and return this card to activate your warranty.

SAFETY INSTRUCTIONS

1.

2.

3.

4.

Know the safety and operating instructions contained in this manual prior to operation of this shear. Become familiar with and understand the hazards and limitations of this shear. Always practice safety.

Wear approved eye safety protection, such as safety glasses or goggles, etc., when operating the shear to protect your eyes.

Protective type footwear should be worn, and jewelry such as rings, watches, necklaces, etc., should be removed prior to operation of this shear.

Do not remove the front hold-down guard (Index # 3). This is a protective device. If the hold-down is inoperable, immediately disconnect the power and lock the main power to the machine, and contact Tennsmith or your authorized distributor for a replacement part

.

Keep the hold-down (Index #3) at the minimum gap required to feed the material into

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6.

7.

8.

9.

the shear. The gap should never be higher than 3/16” from the table

. If you have questions regarding the Hold-down, please consult the factory.

Always keep hands clear of the blade.

Do not misuse the shear by using it for other than its intended purpose.

Never exceed the rated capacity of this machine.

Keep the work area clear and clean to avoid tripping or slipping.

10. Always disconnect the power to the shear prior to performing any maintenance or adjustments to the machine.

11. Turn off machine when not in use.

12. Any malfunction or abnormality pertaining to this machine should be reported to the maintenance supervisor immediately.

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RECEIVING THE SHEAR

Examine the shear and accessories package for evidence of any possible damage sustained during transit. Any damage should be reported to your distributor immediately.

INSTALLING THE SHEAR

Carefully remove the shear from the shipping pallet. Locate the shear in a well-lighted area on a solid level floor. Use lag screws or bolts with expandable shields or similar holding devices through the mounting feet, located on the bottom of the side panels.

Place an accurate machinist level on the table top, and check the level of the machine in both directions. Use metal shims between the floor and the shear mounting surface to adjust the level. After the machine is level, tighten the mounting bolts. Periodically, recheck the unit for levelness.

NOTE: Proper levelness greatly affects the performance of your shear, it is very important to ensure your machine is level prior to operation.

The 36A and 52A shear is available only for air operation. Only certified technicians should perform air connections and any necessary maintenance on this machine. If you have any questions, please consult Tennsmith.

OPERATION INSTRUCTIONS

The mild steel capacity of the Model 36A and 52A shear is 16gauge. Included in the manual is a standard shearing, bending, and forming conversion chart for various materials including Aluminum, Stainless, and Plastics. If you have any capacity related questions on materials that do not appear on the chart, please contact Tennsmith technical support to help determine the exact capacity ratings.

NEVER ATTEMPT TO SHEAR ANY MATERIAL GREATER THAN THE MAXIMUM RATING FOR

YOUR SHEAR.

The 36A and 52A is a fixed angle designed machines. Reducing the maximum width of your material does not increase the capacity rating of this shear.

Never attempt to shear any material which would be less than a ½” cut across the full length of the table under full capacity.

BLADE GAP ADJUSTMENT

The factory setting for the gap between the upper and lower blade is .002. This setting is the optimal clearance for the entire range of material likely to be sheared on this machine. Different materials and thickness may require a larger or slightly smaller clearance. If you have any specific questions regarding optimal blade gap, please consult Tennsmith.

To adjust the blade gap of your shear, the turnbuckles (55) are utilized to move the cutter bar down and hold the position while the blade adjustment is being made. Please note: when checking the blade clearance between the blades at any particular point across the travel of the bed, check the gap at the point where the upper blade intersects the lower blade by 1/8” depth.

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To start, disconnect the main air supply connection to the shear.

Loosen the jam nuts (54) that lock the turnbuckle in position. 1.

2.

3.

Move the cutter bar down by tightening each turnbuckle. To avoid putting the cutter bar in a bind, tighten each turnbuckle evenly. The first checkpoint when verifying or changing the blade gap is 2 inches from the right side end of the blade facing the machine. Make sure the upper blade intersects the lower blade by 1/8”. Once you have moved the cutter bar into the desired position, use a set of shim feeler gauges to verify the blade clearance between the two blades. The second checkpoint is the center of the shear, and the last is 2 inches from the left end of the blades.

To close the gap on the either the left or the right ends of the blade, loosen the table bolts(24) for the particular end you are adjusting, and loosen the 9/16” adjustment screw (22) located in the front of your side panel by a ¼ turn. Next tighten the set screw (21) to move the lower blade towards the upper blade. When you have reached the desired gap verified by your feeler gauge, tighten the adjustment screw (22) to ensure the proper tension on the set screw. To open the gap, reverse the previous procedure.

4. After you have reached the desired gap, tighten the table bolts (24) on each side.

5. The blade gap in the center of the shear is controlled by the adjustment screw (40) located on the backside of the cutter bar of the shear. To close the gap, tighten the screw in ¼ increments until you have reached the desired gap.

6. After you have adjusted the shear gap to the desired settings, move the cutter bar back to its original settings.

This is called the pitch or rake of the blade:

Rake angle settings:

MODEL 36A

Use a marker to mark the shear bed 2 inches to the from the right side edge of the table. Next, measure over 32 inches from the right side edge of the table and make another mark. Starting at the right hand side (facing the machine) at the designated mark on the table, rotate the turnbuckle (55) until the distance between the top and bottom blades is approximately 3/8 of an inch. At the opposing end, repeat the procedure allowing 1 ¾ inches clearance between the upper and lower blades. After you have the desired clearance between the upper and lower blades slightly adjust the turnbuckles so that they have an equal amount of tension. That is, if one turnbuckle has more play or lost motion in it than the other, it should be readjusted accordingly. Once the rake has been set and equal tension verified between the turnbuckles, retighten the jam nuts (54) and lock the turnbuckles in place.

MODEL 52A

Use a marker to mark the shear bed 2 inches to the from the right side edge of the table. Next, measure over 48 inches from the right side edge of the table and make another mark. Starting at the right hand side (facing the machine) at the designated mark on the table, rotate the turnbuckle (55) until the distance between the top and bottom blades is approximately 3/8 of an inch. At the opposing end, repeat the procedure allowing 1 ¾ inches clearance between the upper and lower blades. After you have the desired clearance between the upper and lower blades slightly adjust the turnbuckles so that they have an equal amount of tension. That is, if one turnbuckle has more play or lost motion in it than the other, it should be readjusted accordingly. Once the rake has been set and equal tension verified between the turnbuckles, retighten the jam nuts (54) and lock the turnbuckles in place.

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HOLD-DOWN ADJUSTMENT

CAUTION: THIS SHEAR SHOULD NOT BE OPERATED WITHOUT THE HOLDDOWN IN

PLACE AND PROPERLY ALIGNED.

The hold-down (3) is designed to engage the material before the blades yet allow only minimal clearance between the guard’s feet and the table surface. The gap between the hold-down

feet and table surface should never be above 3/16” of an inch. The gap between the hold-down and the table is controlled by turning the nut on the hold-down studs (11). Clockwise rotation will increase clearance; counter clockwise turns will decrease the gap.

The guard should be held snug against the milled pads on the cutter bar and not feel loose. You must be careful, however, that the hold-down bolts (13) are not so tight as to bind the guard when the cutter bar is in the down position.

Properly aligned, the bolts will snug but still allow rotation of the hold-down screw washers (14). At the rear of the cutter bar you will find two tapped holes wherein hold-down jam screws (45) are located. Once you have applied proper tension to the hold-down screws, tighten the jam screws to lock alignment in place. (Note: The milled pads on the front and rear of the hold-down should be greased periodically to maintain proper action.

BACK GAUGE ADJUSTMENT

Slide back gauge rods (62) through the adjustment blocks (66) and brackets (71). Mount the rods in the holes found at the rear of the cutter bar. Move the gauge angle (63) up the rods until it contacts with the lower blade. Observe the pointers attached to the adjustment blocks and adjust the rods in or out until the embossed scales read zero on the pointers. Tighten the set screws (44) to lock the rods in place.

To attain a particular setting, loosen the four lock screws (70) and slide the gauge to an approximate position. Fine tune adjustments are accomplished by locking the screws of the two adjustment brackets (71) while keeping those of the blocks (66) loose. The adjustment dial (68) can then be used to position the gauge in or out.

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SHARPENING BLADES

Your TENNSMITH shear features “Tri-Action” ground blades. The upper blade has two cutting edges which are ground with a 2 degree edge relief. The upper blade can be turned over to expose the new cutting edge. It can be sharpened on a surface grinder by grinding both wide sides to the blade. The lower blade has one cutting edge with a 2 degree cutting edge relief and a 1 degree face relief. It can be sharpened on a surface grinder by grinding the wide side of the blade having the 1 degree relief. See Figure 2). Blade sharpening service is available from the factory.

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MACHINE SPECIFICATIONS

Maximum shearing capacity, mild steel

Maximum shearing capacity, stainless steel

Maximum cutting length

Model 36A

16 gauge / 1,6mm

20 gauge / 1,0mm

52-1/4 in. / 1327mm

Floor space, gauges in position

Overall dimensions, less gauges, LxWxH

Strokes per minute, full length

Maximum operating pressure

Air consumption per stroke

Maximum shearing capacity, mild steel

Maximum shearing capacity, stainless steel

Maximum cutting length

45 x 80 in. / 1143 x 2032 mm

46-1/4 x 24 x 42 in. / 1181 x 686 x 1067 mm

40

75 psi / 5.1 atmos.

1.1 cu. ft. / 0.031 cu. m

Model 52A

16 gauge / 1,6mm

20 gauge / 1,0mm

52-1/4 in. / 1327mm

Floor space, gauges in position

Overall dimensions, less gauges, LxWxH

Strokes per minute, full length

Maximum operating pressure

Air consumption per stroke

60 x 80 in. / 1524 x 2032 mm

61 x 25 x 42 in. / 1550 x 915 x 1067 mm

40

75 psi / 5.1 atmos.

1.33 cu. ft. / 0.038 cu. m

APPROXIMATE SHEARING, BENDING AND FORMING

CAPCITIES FOR VARIOUS MATERIALS COMPARED TO MILD STEEL

Mild Steel Capacity

NON-FERROUS

1100-0,

20ga. 18ga. 16ga. Mild Steel Capacity

.070 .090 .125 Steel

METALS carbon

20ga. 18ga.

Iron-dead 20ga.

16ga.

5052-0. 6061-T4

2024-T3,

.070 .090 .125 1074, 1095 C.R. Spring Steel

5052-H34 .048 .063 .090 Hot

5086-H36, Low and carbon

Alloys Stainless

24ga. 22ga. 20ga.

Rolled 20ga. 18ga. 16ga.

Electrolytic

Bronze

18ga. 16ga. 14ga. OTHER

Commercial 18ga. 16ga. 14ga. Plastics

70-30

Alloys

18ga. 16ga. 14ga.

Polycarbonate

600

Monel

Zinc as Rolled 20ga. 18ga. 16ga.

Copper-Clad

.086 .115 .150

Gauge

Approximate Gauge Equivalents

28 26 24 22 20 18 16 14 12 11 10

Inches .015 .018 .024 .030 .036 .048 .060 .075 .105 .120 .135

Millimeters .38 .46 .61 .76 1.00 1.25 1.60 2.00 2.70 3.05 3.50

6926 Smithville Hwy. McMinnville, TN 37110

Phone: (931) 934-2211 • Fax (931) 934-2220

Email: [email protected]

www.tennsmith.com

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