National Sheet Metal Machines Inc
National Sheet Metal Machines Inc
National Sheet Metal Machine Inc. is a family owned business in Smartt, Tennessee. They have been in business for over 40 years as the number one shear and brake manufacturer in North America. Developing and manufacturing the most dependable products on the market has been their goal since 1977. Since they began with one machine, the U4816 hand brake, National has grown to produce a line of thirty quality machines.
Metal Shears
National foot shears are designed for precise shearing through 16 gauge mild steel. This shear is also recommended for shearing aluminum, plasitic, copper, brass and lead. All steel side frames, all steel tables and cutter heads with four cutting edge high carbon, high chromium blades, back gauges, table gauges, spring actuated hold down, front arm extensions, bottom treadle safety stop and full three year warranty.
Specifications | |
Model | N5216 |
Capacity (Tensile Strength 55,000 lbs. @ rated capacity) |
Mild Steel 16 Gauge: 1.6mm Stainless Steel 20 Gauge: .9mm |
Cutting Legnth | 52″ 1321mm |
Shipping Weight | 980 lbs 445 kgs |
Floor Space w/ Gauges | 61″ x 75 7/8″ x 42 1/4″ 1549 x 1927 x 1073mm |
Floor Space w/o Gauges | 61″ x 34 1/4″ x 42 1/4″ 1549 x 870 x 1073mm |
Air Shears
National offers three heavy duty air shears with steel side frames, all steel cutter heads and tables. These air shears are standard with four cutting edge high carbon high chromium blades, front arm extensions, table gauges, back gauges, and heavy duty foot switch.
Optional Accessories:
57″ Squaring arm
Model NSA 52
Specifications | |||
Model | NA3612 | NA5216 | NA5212 |
Capacity (Tensile Stregnth 55,000 lbs. @ rated capacity) |
Mild Steel 12 Gauge: 2.7mm Stainless Steel 16 Gauge: 1.6mm |
Mild Steel 16 Gauge: 1.6mm Stainless Steel 20 Gauge: .9mm |
Mild Steel 12 Gauge: 2.7mm Stainless Steel 16 Gauge: 1.6mm |
Strokes Per Minute | Approx. 40 | Approx. 40 | Approx. 40 |
Cutting Legnth | 36″ 914mm |
52″ 1321mm |
52″ 1321mm |
Shipping Weight | 1100 lbs 499 kgs |
1400 lbs 635kgs |
1600 lbs 726 kgs |
Floor Space w/ Gauges | 45” x 75 7/8” x 42 1/4” 1143 x 1927 x 1073mm |
61” x 75 7/8” x 42 1/4” 1549 x 1927 x 1073mm |
62” x 75 7/8” x 42 1/4” 1575 x 1927 x 1073mm |
Floor Space w/0 Gauges | 45” x 22 3/4” x 42 1/4” 1143 x 578 x 1073mm |
61” x 22 3/4” x 42 1/4” 1549 x 578 x 1073mm |
62” x 22 3/4” x 42 1/4” 1575 x 578 x 1073mm |
Recommended p.s.i. | 100 | 100 | 100 |
Hydraulic Shears
National heavy duty power shears are equipped with a fully integrated hydraulic unit. Complete with electrical hydraulic valve, pilot operated-pressure relief valve, heavy duty foot switch that allows this unit to return to the top of the stroke when the operator removes his foot from the foot switch. Heavy duty double acting cylinders. Fully enclosed control panel. Then National shear is actuated by a portable shrouded electric foot switch attached to a long flexible cables so it may be positioned comfortable to the operator. Steel side frames, all steel cutter heads and tables with solid 4-edge high carbon high chromium blades. Quick adjusting back gauge for direct reading with a positive lock. Standard with table gauges and front arm extensions.
Specifications | ||||
Model | NH3612 | NH5216 | NH5212 | NH5210 |
Capacity (Tensile Strength 55,000 lbs. @ rated capacity) |
Mild Steel 12 Gauge: 2.7mm Stainless Steel 16 Gauge: 1.6mm |
Mild Steel 16 Gauge: 1.6mm Stainless Steel 20 Gauge: .9mm |
Mild Steel 12 Gauge: 2.7mm Stainless Steel 16 Gauge: 1.6mm |
Mild Steel 10 Gauge: 3.4mm Stainless Steel 14 Gauge: 1.9mm |
Strokes Per Minute | Approx. 40 | Approx. 25 | Approx. 25 | Approx. 25 |
Cutting Length | 36” 914mm |
52” 1321mm |
52” 1321mm |
52” 1321mm |
Shipping Weight | 1200lbs 544kgs |
1400lbs 635kgs |
1600lbs 726kgs |
1950lbs 885kgs |
Floor Space w/ Gauges | 45” x 75 7/8” x 42 1/4” 1143 x 1927 x 1073mm |
61” x 75 7/8” x 42 1/4” 1549 x 1927 x 1073mm |
61” x 75 7/8” x 42 1/4” 1549 x 1927 x 1073mm |
62” x 79 7/8” x 42 1/4” 1575 x 2029 x 1073mm |
Floor Space w/o Gauges | 45” x 22 3/4” x 42 1/4” 1143 x 578 x 1073mm |
61” x 22 3/4” x 42 1/4” 1549 x 578 x 1073mm |
61” x 22 3/4” x 42 1/4” 1549 x 578 x 1073mm |
62” x 22 3/4” x 42 1/4” 1575 x 578 x 1073mm |
Oil Reservoir Capacity | 14 gal 53 liters |
24 gal 91 liters |
24 gal 91 liters |
24 gal 91 liters |
Motor Single Phase Available |
3 h.p. 208 volt 1800 rpm 240 volt 3 phase 460 volt |
3 h.p. 208 volt 1800 rpm 240 volt 3 phase 460 volt |
3 h.p. 208 volt 1800 rpm 240 volt 3 phase 460 volt |
5 h.p. 208 volt 1800 rpm 240 volt 3 phase 460 volt |
1/4 Hydraulic Shears
National offers four powerful heavy duty precision hydraulic shears with all steel cutter heads and tables. Standard with hydraulic rubber inserted hold downs, quick adjusting back gauge for direct reading with a positive lock, front arm extensions, table gauges, heavy duty foot switch and well lighted work area. You receive a full three year warranty. The hydraulic unit conforms to J.I.C. standards featuring simplicity of design. The National hydraulic system is simple to maintain with standard replacement parts such as valves, cylinders, hoses and oil. The National shear is actuated by a portable shrouded electric foot switch attached to a long flexible cable so it may be positioned comfortable to the operator.
National Shears have high carbon, high chromium blades with four cutting edges of premium quality tool steel and will withstand nicking and wear better than relieved blades. National blades are secured to the shear with tempered flathead screws through countersunk holes in blades. Complete cuts of full width pieces are 2” longer than specified cutting length. The high strength steel side constructed side frames are made of the highest tensile strength metal needed for long life and accurate shearing. Under drive construction with downward cylinders and major hydraulics under the bed gives the shear a low profile.
Specifications | ||||
Model | NH4825 | NH7225 | NH9625 | NH12025 |
Capacity (Tensile Stregnth 55,000 lbs. @ rated capacity) |
Mild Steel 1/4”/6.4mm Stainless 1/8”/3.2mm |
Mild Steel 1/4”/6.4mm Stainless 1/8”/3.2mm |
Mild Steel 1/4”/6.4mm Stainless 1/8”/3.2mm |
Mild Steel 1/4”/6.4mm Stainless 1/8”/3.2mm |
Strokes Per Minute | Approx. 20 | Approx. 20 | Approx. 12 | Approx. 12 |
Cutting Legnth | 48”/1219mm | 72”/1829mm | 96”/2438mm | 120”/3048mm |
Shipping Weight | 5000lbs/2268kgs | 6000lbs/2722kgs | 7000lbs/3176kgs | 9000lbs/4091kgs |
Floor Space w/ Gauges | 66 1/2” x 98” x 54” 1689 x 2489 x 1372mm |
84” x 98” x 54” 2134 x 2489 x 1372mm |
116” x 98” x 60” 2946 x 2489 x 1524mm |
140” x 98” x 60” 3556 x 2489 x 1524mm |
Floor Space w/o Gauges | 66 1/2” x 38” x 54” 1689 x 965 x 1372mm |
84” x 38” x 54” 2134 x 965 x 1372mm |
116” x 39 1/4” x 60” 2946 x 997 x 1524mm |
140” x 39 1/4” x 60” 3556 x 997 x 1524mm |
Oil Reservoir Capacity | 24gal/91 liters | 24gal/91 liters | 24gal/91 liters | 24gal/91 liters |
Motor Single Phase Available |
7 1/2 h.p. 208 volt 1800 rpm 240 volt 3 phase 460 volt |
7 1/2 h.p. 208 volt 1800 rpm 240 volt 3 phase 460 volt |
7 1/2 h.p. 208 volt 1800 rpm 240 volt 3 phase 460 volt |
7 1/2 h.p. 208 volt 1800 rpm 240 volt 3 phase 460 volt |
Mechanical Shears
All USA made, rugged welded construction. Inch bed scales, accurate table side gauges. Hold down finger guard with non-marring urethane and positive spring actuation. High carbon high chrome long life tool steel blades. Upper and lower blades are interchangeable. Non-metallic gibbs, maintenance-free self-lubricating bearings. Continuous cycle, single cycle and jog for different needs. Fully guarded safety foot switch, low power consumption.
Specifications | ||||
Model | NM410 | NM610 | NM810 | NM1014 |
Capacity Tensile Strength 55,000 @ rated cap | Mild Steel 10 Gauge 3.4 mm SS 14 Gauge 2mm |
Mild Steel 10 Gauge 3.4 mm SS 14 Gauge 2mm |
Mild Steel 10 Gauge 3.4 mm SS 14 Gauge 2mm |
Mild Steel 14 Gauge 2 mm SS 16 Guage 1.6 mm |
Strokes Per Minute | Approx. 40 | Approx. 40 | Approx. 40 | Approx. 40 |
Cutting Legnth | 49″/1244 mm | 73″/1854 mm | 97″/2464 mm | 121″/3073 mm |
Shipping Weight | 3600 lbs/1632 kg | 4900 lbs/2223 kg | 6850 lbs/3107 kg | 6100 lbs/2767 kg |
Floor Space w/ Gauges | 73″x89″x53″ 1854x2260x1346 |
92″x89″x53″ 2362x2260x1346 |
117″x89″x53″ 2972x2260x1346 |
141″x32″x53″ 3581x2260x1346 |
Floor Space w/o Gauges | 73″x28″x53″ 1854x711x1346 |
93″x28″x53″ 2362x711x1346 |
117″x28″x53″ 2972x711x1346 |
141″x32″x53″ 3581x813x1346 |
Motor | 7.5 hp 208 v 240 v 460 v 3 phase |
7.5 hp 208 v 240 v 460 v 3 phase |
7.5 hp 208 v 240 v 460 v 3 phase |
5 hp 208 v 240 v 460 v 3 phase |
Bench Brakes
Simplicity of design allows these brakes to work in the most direct fashion. Easy to set up and operate. Body sections are welded steel plates, with heavy truss rods and braces for longer life and greater strength. These brakes are standard with extension handles, apron stop for repeat bends, and replaceable bushings at points of wear.
Specifications | ||||
Model | U4816 | S4816 | Stand | |
Capacity (Yield Strength 30,000 lbs. @ rated capacity) |
Mild Steel 16 Gauge 1.6mm Stainless 20 Gauge .9mm |
Mild Steel 16 Gauge 1.6mm Stainless 20 Gauge .9mm |
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Maximum Lift of Beam | 1 1/4”/32mm | 1 1/4”/32mm | ||
Finger Width | 2” 3” 4” 51mm 76mm 102mm |
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Maximum Depth of Box | 4”/102mm | |||
Bending Length | 48 1/4”/1226mm | 48 1/4”/1226mm | ||
Shipping Weight | 500lbs/227kgs 1689 x 965 x 1372mm |
470lbs/213kgs 2134 x 965 x 1372mm |
100lbs/45kgs | |
Floor Space | 54”x19”x271/4” 1372x483x692mm |
Box and Pan Brakes
National has four popular floor model box and pan brakes designed to be easy and simple to operate. Standard with 2″ x 3″ and 4″ finger widths, stop rods for repeat bends, two large counterweights, and precision bearings on the apron. All steel body construction with extra heavy tie rods for minimum deflection.
Specifications | ||||
Model | U4812 | U7216 | U7212 | U9616 |
Capacity (Yield Strength 30,000 lbs. @ rated capacity) |
Mild Steel 12 Gauge: 2.7mm Stainless Steel 16 Gauge: 1.6mm |
Mild Steel 16 Gauge: 1.6mm Stainless Steel 20 Gauge: .9mm |
Mild Steel 12 Gauge: 2.7mm Stainless Steel 16 Gauge: 1.6mm |
Mild Steel 16 Gauge: 1.6mm Stainless Steel 20 Gauge: .9mm |
Fimger Width | 2”, 3”, 4” 51, 76, 102mm |
2”, 3”, 4” 51, 76, 102mm |
2”, 3”, 4” 51, 76, 102mm |
2”, 3”, 4” 51, 76, 102mm |
Maximum Depth of Box | 4”/102mm | 4”/102mm | 4”/102mm | 4”/102mm |
Bending Length | 49”/1245mm | 73”/1854mm | 73”/1854mm | 97”/2464mm |
Shipping Weight | 1150lbs/522kgs | 1850lbs/839kgs | 2100lbs/953kgs | 2200lbs/998kgs |
Floor Space w/ counterweight | 95” x 27” x 55” 2413 x 686 x 1397mm |
119” x 27” x 55” 3023 x 686 x 1397mm |
129” x 27” x 59” 3277 x 686 x 1499mm |
143” x 27” x 55” 3632 x 686 x 1397mm |
Heavy Duty Box & Pan Brakes
National offers four heavy duty box and pan brakes made in the U.S.A. Standard with heavy body construction, precision bearings on the apron, two large cast iron counterweights and apron stop for repeat bends.
Section fingers are precision machined from rolled steel bar stock for maximum strength. The fingers can be adjusted or removed quickly by the loosening of a cap screw. Heavy duty steel plates and tension bars are precision incorporated for minimum deflection.
Specifications | ||||
Model | U6-4812 | U6-7212 | U6-9614 | U6-12016 |
Capacity (Yield Strength 30,000 lbs. @ rated capacity) |
Mild Steel 12 Gauge: 2.7mm Stainless Steel 16 Gauge: 1.6mm |
Mild Steel 12 Gauge: 2.7mm Stainless Steel 16 Gauge: 1.6mm |
Mild Steel 14 Gauge: 1.9mm Stainless Steel 18 Gauge: 1.2mm |
Mild Steel 16 Gauge: 1.6mm Stainless Steel 20 Gauge: .9mm |
Maximum Depth of Box | 6”/152mm | 6”/152mm | 6”/152mm | 6”/152mm |
Bending Length | 49”/1245mm | 73”/1854mm | 97”/2464mm | 121”/3073mm |
Shipping Weight | 1900lbs/862kgs | 2530lbs/1148kgs | 2800lbs/1270kgs | 3200lbs/1452kgs |
Floor Space w/ counterweight | 95” x 27” x 55” 2413 x 686 x 1397mm |
126 1/2” x 29” x 59” 3213 x 737 x 1499mm |
153” x 27” x 59” 3886 x 686 x 1499mm |
177” x 29” x 59” 4496 x 737 x 1499mm |
Hand Brakes
National offers these hand brakes with a great deal of pride. A simple design, utmost strength with a long life of dependable service. Streamline designed for fast, accurate bending – even for the inexprienced workman. Heavy steel body construction with extra heavy tie rods for perfect alignment. Precision bearings on the apron assures you of a smooth operating brake.
Specifications | |||
Model | N4812 | N7212 | N9616 |
Capacity (Yield Strength 30,000 lbs. @ rated capacity) |
Mild Steel 12 Gauge: 2.7mm Stainless 16 Gauge: 1.6mm |
Mild Steel 12 Gauge: 2.7mm Stainless 16 Gauge: 1.6mm |
Mild Steel 16 Gauge: 1.6mm Stainless 20 Gauge: .9mm |
Bending Length | 49”/1245mm | 73”/1854mm | 97”/2464mm |
Shipping Weight | 1050lbs/476kgs | 1800lbs/816kgs | 1600lbs/726kgs |
Floor Space w/ Gauges | 95” x 27” x 55” 2413 x 686 x 1397mm |
129” x 27” x 59” 3277 x 686 x 1499mm |
143” x 27” x 55” 3632 x 686 x 1397mm |
Specifications | |||
Model | N9614 | N12016 | N12014 |
Capacity (Yield Strength 30,000 lbs. @ rated capacity) |
Mild Steel 14 Gauge: 1.9mm Stainless 18 Gauge: 1.2mm |
Mild Steel 16 Gauge: 1.6mm Stainless 20 Gauge: .9mm |
Mild Steel 14 Gauge: 1.9mm Stainless 18 Gauge: 1.2mm |
Bending Length | 97”/2464mm | 121”/3073mm | 121”/3073mm |
Shipping Weight | 1750lbs/794kgs | 2800lbs/1270kgs | 3200lbs/1452kg |
Floor Space w/ Gauges | 153” x 27” x 59” 3886 x 686 x 1499mm |
177” x 29” x 59” 4496 x 737 x 1499mm |
177” x 29” x 59” 4496 x 737 x 1499mm |
Specifications | ||
Model | N14418 | |
Capacity (Yield Strength 30,000 lbs. @ rated capacity) |
Mild Steel 18 Gauge: 1.3mm Stainless 22 Gauge: .85mm |
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Bending Length | 145”/3683mm | |
Shipping Weight | 3450 lbs/1553kgs | |
Floor Space w/ Gauges w/ Counterweight |
201” X 29 X 59” 5105mm x 737mm x 1499mm |
Power Roll Forming Machine
National’s 3″ and 4″ power rolls are designed for simple operation. Standard with forward and reverse drum switch. Quick release upper roll. Positive chain drive. Heavy duty gear box. Front guard for additional safety. Heavy duty stand is standard.
National’s rolls incorporate three precision turned, ground, and polished high carbon steel rolls. Extra heavy duty and frames with quick release handle on the right front for speedy production forming.
The drive train is powered with a heavy duty precision reduction gear box are housed in a ventilated stand for protection.
Precision roll adjustment is achieved by turning the hand wheel on the left end of the roll. Repeatability is maintained by the forming scale above the hand wheel.
Specifications | ||
Model | NR-4816 | NR-7216 |
Capacity (Tensile Stregnth 55,000 lbs. @ rated capacity) |
16 Gauge: 1.6mm | 16 Gauge: 1.6mm |
Maximum Forming Length | 48 1/4”/1226mm | 72 1/4”/1835mm |
Diameter of Roll | 3”/76mm | 4”/102mm |
Minimum Forming Radius | 1 1/2”/38mm | 2”/51mm |
Wire Grooves (Optional) | 3/8”, 1/2”, 5/8”/10mm, 13mm, 16mm | 3/8”, 1/2”, 5/8”/10mm, 13mm, 16mm |
Roll Speed | 18 rpm/14.13 sfpm | 18 rpm/14.13 sfpm |
Motor: 110-220 Single PH 208-220-440 3 PH |
1 hp | 1 hp |
Floor Space (l x w x h) | 64” x 37” x 44 1/2” 1626 x 940 x 1130mm |
88” x 26” x 43 3/4” 2335 x 660 x 1111mm |
Shipping Weight | 970 lbs/440 kgs | 1740 lbs/814 kgs |
Quick Set
National’s Quick Set is a two turn manual digital readout back gauge. It’s a linear digital measuring system showing metric, Decimal or fractional display with accuracy and repeatability. All moving parts are guarded for safety. Travels 32 inches in two seconds. All parts are made in the USA.
Front Operated Digital Back Gauge
L.E.D. CONTROL
- Precision digital front operated back gauge
- Control panel located out of the work area, yet convenient for the operator.
- Precision Thomson bearings
- Max travel 30”/762mm
- Precision reliable repeatability improves cutting accuracy.
- Shipped assembled for easy mounting
- Digital readout in increments of one thousandth of an inch
- No memory loss due to power failure
- Easy mounting, can be retrofitted to any National Shear
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Specifications |
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Model |
NBG36 |
NBG52 |
NBG48 |
Floor Space (l x w x h) |
36” x 44” x 161/2” 915x1118x419mm |
511/4” x 44” x 161/2” 1302x1118x419mm |
511/4” x 48’ x 19” 1302x1219x483mm |
Shipping Weight |
300lbs/136kgs |
340lbs/154kgs |
380lbs/172kgs |
Travel |
30”/762mm |
30”/762mm |
30”/762mm |
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Specifications |
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Model |
NBG72 |
NBG96 |
NBG120 |
Floor Space (l x w x h) |
72” x 48” x 19” 1829x1219x483mm |
81″ x 48″ x 19″ |
88″ x 48″ x 19″ |
Shipping Weight |
480lbs/218kgs |
580 lbs/26 1kgs |
680 lbs/306 kgs |
Travel |
30”/762mm |
30”/762mm |
30”/762mm |
Squaring Arm
National brings to you a squaring arm constructed of high tensile strength, durable solid cast iron. National’s squaring arm comes with 57” to 60” black oxided scale with 1/16” increments. This squaring arm comes with jack screws for easy leveling. National’s squaring arms are easily assembled on the left side of the machine.
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Specifications |
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Model |
NSA52 |
NSA48 |
NSA72 |
NSA96 |
NSA120 |
Length |
431/2”/1105mm |
45”/1143mm |
45”/1143mm |
45”/1143mm |
45”/1143mm |
Shipping Weight |
72lbs/33kgs |
107lbs/49kgs |
107lbs/49kgs |
107lbs/49kgs |
107lbs/49kgs |