IndustryHeavy Machinery

Heavy Machinery

Construction, agriculture and material handling

We serve manufacturers of excavators, front loaders, cranes, tractors and equipment for construction, mining and agriculture, where every component works long shifts under heavy load, impact, vibration and fatigue. Shafts, gears, pins, bushings, buckets and frames need materials of great strength and toughness, often heat treated or coated, able to withstand severe conditions without failing or deforming. At NAT MAC we supply alloy and high-strength steels, machinery-grade and tool steels, and abrasion-resistant grades, in the dimensions required for both new equipment and spare parts. We complement them with cutting services, specialty lubricants and technical advice to specify the ideal material, helping machinery run reliably and making maintenance and part replacement faster and more economical.

Main features
Materials for heavy loads, impact, fatigue and wear.
Highly stressed mechanical components such as shafts, bolts, gears and bushings.
Fabrication, repair and maintenance of industrial machinery and equipment.

What is made in this industry?

Frames and chassis
Main structures for high-capacity machinery and equipment.
Axles and shafts
Rotating components subject to torque, load and fatigue.
Gears and pinions
Drive elements used in machinery and motion systems.
Bolts and pins
Components for joints, connections and moving systems.
Bushings and bearings
Support and friction elements used in mechanisms and joints.
Hydraulic components
Rods, supports, fittings and parts for hydraulic systems.
Wear parts
Blades, guides, reinforcements and components subject to abrasion.
Rollers and pulleys
Elements used in motion and conveying systems.
Spare parts
Replacement parts for equipment repair and maintenance.

Featured products

4140 Steel4140 SteelGeneral use4340 Steel4340 SteelDemanding applications8620 Steel8620 SteelCarburized gears9840 Steel9840 SteelHigh performance1018 Steel1018 SteelLow-carbon steel1045 Steel1045 SteelMedium-carbon steel1045 Chrome-plated Bar1045 Chrome-plated BarHard-chrome plated ground barA36 SteelA36 SteelGeneral-purpose structural plateA572 SteelA572 SteelHigh-strength low-alloyS7 SteelS7 SteelShock resistant1.2714 Steel1.2714 SteelHot work6061 aluminum6061 aluminumStructures and precision machiningSAE 660 BronzeSAE 660 BronzeGeneral-purpose bearing bronzeSAE 68 BronzeSAE 68 BronzeHigh-strength aluminum bronzeC36000 BrassC36000 BrassHigh-machinability brassNylon M naturalNylon M naturalCast polyamide 6Nylon SL blackNylon SL blackAnti-friction cast polyamide 6Nylon HS blueNylon HS blueCast polyamide 6 with UV and heat protectionAcetal (POM)Acetal (POM)High-stiffness, dimensionally stable polyacetalUHMW Polyethylene PE 1000UHMW Polyethylene PE 1000UHMWPE with maximum abrasion and impact resistanceHMW Polyethylene PE 500HMW Polyethylene PE 500Impact- and wear-resistant HMWPETeflon (PTFE)Teflon (PTFE)Non-stick, chemically inert fluoropolymerPolycarbonate (PC)Polycarbonate (PC)Transparent thermoplastic with extremely high impact resistancePET PolyesterPET PolyesterSemi-crystalline polyethylene terephthalate, rigid and highly stableCeloronCeloronPhenolic canvas laminate, mechanical-electrical gradePrimalloy™Primalloy™Starrett bi-metal band saw blade with Extended Life (EXT) treatment for maximum fatigue life.Intenss™Intenss™Starrett M42 bi-metal band saw blade with a strong tooth geometry for workshops and maintenance.Intenss™ PROIntenss™ PROStarrett full-line bi-metal band saw blade for production cutting of ferrous and non-ferrous materials.Versatix™ MPVersatix™ MPStarrett bi-metal band saw blade with a geometry developed for structural materials.NATCUT™ M42-PNATCUT™ M42-PM42 bi-metal band saw blade with pointed tooth for general-purpose cutting.NATCUT™ M42-TNATCUT™ M42-TM42 bi-metal band saw blade with tensile tooth for hollow sections and structural shapes.NATCUT™ M42-HNATCUT™ M42-HM42 bi-metal band saw blade with turtle-back (H) tooth for heavy loads and bundle cutting.NATCUT™ M51-PNATCUT™ M51-PPowder-metallurgy M51 bi-metal band saw blade with pointed tooth for high-hardness materials.NATCUT™ M51-TNATCUT™ M51-TM51 bi-metal band saw blade with tensile tooth for structural shapes and high-hardness materials.Advanz™ MC7Advanz™ MC7Starrett carbide band saw blade with progressive ground trapezoidal tooth (7 chips) for difficult steels.Advanz™ CSAdvanz™ CSStarrett triple-chip carbide band saw blade with negative rake for hardened materials.Advanz™ TSAdvanz™ TSStarrett carbide band saw blade with triple chip geometry and aggressive rake angle, general purpose.CONDACUT®CONDACUT®Specialty lubrication for precision cutting and machiningMECAGREEN®MECAGREEN®Plant-based water-soluble machining fluidsPOLYBIO®POLYBIO®Soluble oils for multi-metal machining and grindingCONDAFORGE®CONDAFORGE®Water-based graphite lubricants for hot and warm forgingORAFOR®ORAFOR®Water-based synthetic lubricants for hot and warm forgingCalipersCalipersOutside, inside, depth and step measurement, with digital or vernier reading.MicrometersMicrometersHigh-precision outside measurement, with carbide faces and electronic models.Inside and depth gagesInside and depth gagesDepth of holes, slots and steps.Indicators and dial gagesIndicators and dial gagesDial and digital indicators for tolerance verification.Bore gagesBore gagesInside diameter measurement, including 3-point AccuBore.SquaresSquaresSquareness and right-angle verification in the shop.Rules and parallelsRules and parallelsLayout, alignment and reference surfaces.Protractors and angle gagesProtractors and angle gagesPrecise angle measurement and layout.Dividers and layout toolsDividers and layout toolsLayout, dimension transfer and long distances.Height gagesHeight gagesVertical layout and measurement on a granite surface plate.Hardness testersHardness testersPortable and bench hardness testing.Thickness and coating gagesThickness and coating gagesWall and coating thicknessSurface roughness testersSurface roughness testersRoughness measurement (Ra, Rz…)M1® LubricantM1® LubricantMulti-purpose oil that cleans, penetrates, lubricates and protects against corrosion.