Commercial & Industrial Machinery Repair and Maintenance (U.S.)

NAICS 2022 code 811310 — Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance. NAICS is the North American Industry Classification System, the U.S. government's standard scheme for grouping businesses. [4]

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1. Overview

This is the industry that keeps America's heavy machines running: the independent shops and field-service crews that repair, rebuild, and maintain forklifts, machine tools, construction and mining equipment, industrial pumps, motors and compressors, commercial refrigeration, agricultural machinery, and factory production lines. [4] It is fundamentally an uptime business — customers pay to keep essential equipment operating, safe, and productive — and a labor-and-parts service business, not a manufacturing one. Owners sell skilled technician hours, replacement parts, and maintenance contracts rather than new machines.

Two features make it worth an investor's attention. First, it is counter-cyclical at the margin: when new-equipment prices rise or capital budgets tighten, owners fix and rebuild what they already own instead of buying new, which pushes work toward repair shops. Second, it is enormously fragmented — roughly 22,000 mostly small employer firms with no dominant player — which makes it a classic "roll-up" hunting ground for private buyers.

• Public-market investors have no pure play here. Exposure comes indirectly through equipment dealers, industrial distributors, flow-equipment makers, and rental companies whose parts-and-service arms sit inside this activity (Section 4).
• Private investors are where this industry actually lives: buying, backing, or consolidating independent repair shops, authorized dealer territories, and specialty service platforms — many small enough to finance with a Small Business Administration (SBA) loan.

The key investment question in either case is whether a business can turn scarce technical labor, parts availability, and local service density into repeatable revenue and cash flow.

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2. What it is, and how it's structured

Scope. Establishments primarily engaged in repairing and maintaining commercial and industrial machinery and equipment: agricultural, construction, and mining machinery; forklifts and other material-handling equipment; machine tools; industrial motors, pumps and compressors; commercial refrigeration equipment; and general/industrial welding repair, including sharpening or installing industrial blades and saws. [4]

What it explicitly EXCLUDES — the boundaries matter, because adjacent work is counted under other codes:

• Automotive repair (except welding) → NAICS Industry Group 8111, Automotive Repair and Maintenance. [4]
• Electronic and precision equipment — computers, office machines, communications gear, medical and lab instruments → NAICS 811210. [4]
• Home/household and appliance repair → NAICS 8114. [4]
• Heating, ventilation, and air-conditioning (HVAC) contracting and building-equipment installation done as a construction trade → NAICS 238 (e.g., HVAC 238220). Refrigeration equipment repair, by contrast, is in scope. [4]
• Elevator and escalator maintenance → generally a building trade (NAICS 238290), which is why elevator specialists sit adjacent to, not inside, 811310. [4]
• Equipment rental and leasing (NAICS 5324), plus specialized support such as oil-and-gas rig support (213112), aircraft repair (488190), and railroad rolling-stock repair (488210). [4]

811310 is an establishment classification, not a clean company-level business model. A dealer, OEM (original equipment manufacturer), or rental company may perform substantial 811310-type work while reporting most of its revenue under manufacturing, wholesale, rental, or construction codes. [4]

Ownership mix. Three overlapping owner types:

1. Independent repair shops — the bulk of the ~22,000 firms; owner-operated, often single-location, averaging under 10 employees. [1]
2. OEM-authorized dealer service networks — the parts-and-service departments of Caterpillar, Deere, Komatsu and similar dealers. Most large dealers are privately held regional franchises (e.g., Holt Cat, Ziegler, RDO). [26]
3. Captive (in-house) maintenance departments — the maintenance staff employed directly by factories, utilities, and mines. These are not counted in 811310 (they sit inside their employer's industry), which is the single biggest reason federal statistics understate how much machinery-repair work actually happens (see §3).

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3. How big it is

Federal figures for the employer side of NAICS 811310:

That works out to roughly $2.5 million of revenue per firm and about 10 employees per establishment [1][2] — a small-business industry by any measure. Average payroll runs near $73,000 per employee [1], reflecting skilled trades (millwrights, welders, industrial mechanics, refrigeration techs).

The undercount caveat — real, and large. The $54.6 billion / 22,000-firm employer picture understates the industry's true footprint in two ways:

• Non-employer sole proprietors (one-person mobile mechanics with no payroll) are excluded. CBP covers establishments with paid employees, and the Economic Census concentration universe also requires paid employees. [1][2] Private research firm IBISWorld, which counts solo operators, puts the field closer to ~56,000 businesses and ~$60 billion in 2025–26 revenue. [5]
• In-house maintenance performed by manufacturers, utilities, mines, and government fleets on their own equipment is enormous but is classified in their industries, not here. The federal number captures only work bought from an outside repair establishment.

So treat $54.6 billion as the measured, outsourced, employer portion — not the total economic activity of "fixing industrial machines."

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4. The investable universe

There is no pure-play public company whose entire business is NAICS 811310 machinery repair. The industry is too fragmented and too small-shop. Public-market exposure is therefore indirect, through larger businesses that carry a substantial parts-and-service (aftermarket) operation. Tickers below are exposure proxies, not clean matches; public companies rarely disclose the exact 811310 slice of their revenue.

Heavy-equipment and flow OEMs — Caterpillar (NYSE: CAT), Deere (NYSE: DE), Ingersoll Rand (NYSE: IR), ITT (NYSE: ITT) — also earn high-margin, recurring aftermarket parts-and-service revenue, though the actual wrench-turning is often done by their independent dealers. [26] Industrial field-service and inspection names such as Team, Inc. (NYSE: TISI) and Mistras Group (NYSE: MG) do mechanical repair, asset-integrity, and testing that feeds repair decisions.

Private and other owners dominate the true industry: thousands of independent shops; privately held OEM dealer groups; and private-equity-backed service platforms. Representative names:

• Crown Equipment — family-led, privately held material-handling manufacturer with company-owned and independent service dealers. [27]
• Briggs Equipment — employee-stock-ownership-plan (ESOP)-owned full-service material-handling company within Sammons Industrial. [28]
• American Equipment Holdings — overhead-crane and hoist maintenance/repair/overhaul platform backed by Rotunda Capital Partners; a live example of PE roll-up in crane service. [29]
• American Crane & Equipment Corporation — privately held crane and hoist business (inspection, preventive maintenance, emergency repair, parts). [30]

For a private investor, this private tier — not the public proxies — is the main event (see §10).

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5. How the money works

Owners make money on levers that all rest on billable technician time:

1. Labor. The core product is a skilled technician-hour billed at a marked-up shop or field rate. The key operating metric is technician utilization — the share of paid hours that are billable to a customer. Field crews add a truck-roll and travel component. Related: first-time fix rate (fixing it in one visit protects margin) and revenue per technician.
2. Parts. Replacement parts and consumables carry a markup and often out-earn labor on gross-profit dollars; parts also pull in future service work.
3. Contracts. Preventive/planned-maintenance agreements convert unpredictable break-fix work into recurring, higher-margin revenue and lock in the relationship. Contract mix vs. reactive "break-fix" mix is a core quality-of-earnings signal.
4. Rebuilds, refurbishment, modernization, inspections, and warranty/OEM-authorized work round out the revenue stack.

For dealer-attached service (Alta, Titan, Caterpillar dealers), the metric that matters most is the absorption rate — the share of a dealer's total fixed overhead covered by parts-and-service gross profit alone. A high-absorption dealer can keep the lights on from stable, recurring parts and service even when big-ticket new-equipment sales go cold, which is why parts and service — not machine sales — typically generate the majority of dealer gross profit. [19]

Metrics that matter: billable hours and revenue per technician; same-location (not same-store) service revenue; preventive-maintenance renewal rate; first-time fix rate and response time; parts gross margin and inventory turns; service attachment to equipment sales/rentals; backlog and emergency-call mix; customer concentration and receivables. The Bureau of Labor Statistics (BLS) also publishes a dedicated Producer Price Index (PPI) for NAICS 811310, useful for judging whether service prices are keeping pace with wages, parts, travel, and insurance. [6]

The economics are attractive because demand is non-discretionary (a broken machine stops production and costs the customer money by the hour), recurring (machines wear and need scheduled care), and local/relationship-based (response time and trust beat price). The binding constraint is skilled labor: revenue is effectively capped by how many good technicians you can hire and keep utilized. A dealer adds facilities, inventory, and territory rights; a rental company also carries heavy fleet capital — so the same headline revenue can mean very different economics.

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6. What drives demand

• Industrial activity and machinery utilization. The more hours factories, mines, farms, warehouses, and job sites run their machines, the faster those machines wear and the more maintenance they need. Manufacturing capacity utilization (the share of factory capacity in use) is a useful macro proxy, though not an 811310 measure — it ran about 75.7% in mid-2026 against a long-run average near 78%. [7]
• Age of the installed base. Older equipment needs more repair. Much of the U.S. industrial base is aging, and a large share of manufacturers still run reactive or time-based maintenance rather than modern predictive programs — a backlog of deferred upkeep that eventually converts to repair work. [14]
• Outsourcing of maintenance. Customers increasingly contract out upkeep to protect uptime, moving work into 811310 that was once done in-house.
• Repair-vs-replace economics. When new-machine prices, interest rates, or tariffs rise, the math tips toward fixing and rebuilding existing equipment.
• Reshoring and factory construction. Announced U.S. manufacturing investment has surged, and much of the equipment being brought back into service is old and maintenance-hungry — a forward tailwind if plans convert to spending. [13]
• Downtime cost. In continuous-process and high-throughput operations, an hour of unplanned downtime can dwarf the repair bill, keeping maintenance relatively defensive even in downturns.
• End-market cycles. The industry serves agriculture, construction, mining, oil and gas, warehousing, and general manufacturing, so demand is a blend of those cycles rather than one.

Labor is both a demand driver and a constraint: BLS projects employment of industrial machinery mechanics, machinery maintenance workers, and millwrights to grow 13% from 2024 to 2034, well above the all-occupations average. [8] Maintenance is generally more resilient than new-equipment sales because customers must keep existing assets running — but it is still cyclical, since noncritical repairs, rebuilds, and modernization can be deferred when utilization or industrial profits weaken.

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7. Regulation

Machinery repair is lightly licensed but heavily safety- and environmentally regulated, mostly at the technician and job-site level:

• OSHA (Occupational Safety and Health Administration). The Control of Hazardous Energy / lockout-tagout (LOTO) standard, 29 CFR 1910.147, governs how machines are de-energized before service; OSHA estimates it prevents roughly 120 deaths and 50,000 injuries a year. [9] The Powered Industrial Trucks rule, 29 CFR 1910.178, governs forklift maintenance, authorized repair personnel, inspections, and removing unsafe trucks from service. [10] Welding/"hot work," confined-space entry, and machine-guarding rules also apply directly to this work.
• EPA (Environmental Protection Agency). Technicians who service equipment that could release refrigerants must hold Section 608 certification under the Clean Air Act (40 CFR Part 82). [11] The ongoing hydrofluorocarbon (HFC) phase-down raises the stakes on proper refrigerant handling in commercial-refrigeration repair.
• Trade licensing and codes. State/local licensing for refrigeration and certain trades; ASME boiler and pressure-vessel codes; crane and rigging certifications; DOT (Department of Transportation) rules for service trucks; environmental-disposal rules; and customer- or procurement-specific safety requirements.
• Right to repair — the regulation to watch. Independent shops depend on access to OEM parts, manuals, diagnostic software, and tools. As machines fill with proprietary electronics and locked software, OEMs can steer service back to themselves. Right-to-repair laws push the other way: Colorado passed the first U.S. agricultural-equipment right-to-repair law (2023), several states have electronics statutes, and farm-equipment makers have signed voluntary repair-access commitments. [12] The outcome directly shapes how much repair work independents can capture versus OEM dealer networks.

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8. Competitive dynamics & consolidation

The federal concentration data confirm an unusually fragmented market — the largest firms hold very little share:

(The Herfindahl-Hirschman Index, or HHI, a standard concentration gauge, is suppressed for this industry in the federal data, so none is used here. [2]) A CR4 of just 10.6% means the four biggest players together hold barely a tenth of the market — the definition of a fragmented industry.

Competition is local and equipment-specific. The strongest businesses combine dense technician coverage, fast parts access, OEM authorization or proprietary equipment knowledge, reliable emergency response, and digital condition-monitoring/dispatch. Independents compete through multi-brand flexibility, lower overhead, and willingness to service older equipment; OEM dealers compete through technical data, warranty support, and parts access.

What's consolidating it:

• Distributor and PE roll-ups. Industrial distributors are bolting service onto product — DXP is actively acquiring pump-repair and rotating-equipment shops [16]; Applied has built an engineered-service arm [17]. Private-equity platforms such as American Equipment Holdings (Rotunda Capital) are buying independent shops to build regional service networks. [29]
• OEM push into aftermarket. Equipment makers increasingly treat service, parts, and connected/telematics monitoring as recurring revenue and use it to lock customers into their dealer networks. [26]
• Rental-company scale. The 2025 Herc–H&E deal (~$5.3 billion) shows how much scale is concentrating in equipment rental, which carries large captive fleet-maintenance operations. [23]

Consolidation is likely to continue, but integration risk is high because local relationships and technical talent are hard to standardize. The independents' durable defenses — response time, local relationships, technician skill, and multi-brand capability — are advantages a national roll-up cannot easily replicate.

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9. Risks

• Cyclicality. Tied to industrial capital spending, farm income, construction, mining, energy, and rental activity, which can weaken together. A downturn defers the discretionary portion of maintenance (the counter-cyclical repair-vs-replace effect only partly offsets this).
• Skilled-labor scarcity. An aging technician workforce and thin trade-school pipeline cap growth; wage inflation and turnover raise costs. The binding constraint is people, not demand. [8]
• Input-cost inflation and tariffs. Steel/aluminum tariffs and parts inflation squeeze margins if they can't be passed through — the same tariffs that nudge customers toward repair also raise repair-part costs. [5]
• Parts and supply-chain risk. Unavailable components delay repairs and idle billable technicians.
• OEM encroachment and proprietary lock-out. Software-gated diagnostics and parts can push work to OEM dealers; the direction of right-to-repair law is a real swing factor. [12]
• Customer insourcing. Large industrial customers can pull routine maintenance back in-house when they have spare labor.
• Safety and environmental liability. Accidents, equipment failures, refrigerant violations, and worksite claims can be costly. [9][10][11]
• Technology transition. Electric, automated, and connected equipment demands new skills and tools.
• Small-business fragility / acquisition risk. Owner-operated shops face succession risk, key-person dependence, and thin balance sheets; roll-ups can overpay, lose technicians, dilute service quality, or add excessive debt.

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10. How to invest, and the outlook

Public routes (indirect). No listed company is a pure machinery-repair play, so public investors buy the aftermarket inside larger businesses. Start with exposure quality, not ticker popularity — separate equipment sales, rentals, parts, warranty work, and recurring service revenue, and favor disclosures showing recurring maintenance, strong same-location growth, technician productivity, pricing power, parts availability, and disciplined acquisitions.

• Highest service/aftermarket weighting: Flowserve (FLS) and DXP (DXPE) for rotating-equipment repair; Applied Industrial (AIT) for MRO and engineered service. [15][16][17]
• Dealer parts-and-service exposure: Alta (ALTG), Titan (TITN), Konecranes (KCR), and — for aftermarket-heavy OEMs — Caterpillar (CAT), Deere (DE), Ingersoll Rand (IR). [18][19][20][26]
• Fleet-service and field-service exposure: United Rentals (URI), Herc (HRI), Sunbelt (SUNB), EquipmentShare (EQPT), Team (TISI), Mistras (MG). [21][22][23][24]

Reserve valuation work — dividend yields, earnings multiples, EV/EBITDA (enterprise value to earnings before interest, taxes, depreciation, and amortization) — for the extent to which a name's repair/service segment actually drives the thesis, and only after adjusting for capital intensity. A rental company that owns a large fleet should not be valued like an asset-light local repair shop.

Private routes (direct — where the industry really is). This is a textbook small-business acquisition and roll-up space:

• Buy an established shop. Most firms fall under the SBA's $12.5 million size standard [3], so acquisitions are financeable with SBA 7(a) loans and are a common target for individual buyers and search funds.
• Build a platform. Acquire a well-run regional shop and bolt on neighbors to gain density, cross-brand capability, and preventive-maintenance contract scale — the PE thesis DXP and American Equipment Holdings are executing. [16][29]
• Private credit. Equipment-backed loans and acquisition financing offer indirect exposure, but leverage and collateral quality need close review.
• Value drivers to underwrite: contract (recurring) vs. break-fix mix, technician utilization and retention, parts-margin capture, OEM-authorization status, and customer concentration.

Near-term outlook. The base case is steady, low-single-digit growth — IBISWorld models roughly $60 billion in 2025–26. [5] The upside rests on reshoring converting announced factory investment into real maintenance demand [13] and on an aging installed base with a deferred-maintenance backlog. [14] The swing factors are skilled-technician supply (a hard ceiling on growth), tariff-driven parts inflation (a margin risk that simultaneously nudges customers toward repair over replacement), and the direction of right-to-repair policy (which decides how much of the pie independents keep versus OEM networks). Net: a defensive, cash-generative, deeply fragmented service industry — modest as a public-equity theme, but a rich field for private ownership and consolidation.

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Sources

1. U.S. Census Bureau, County Business Patterns (CBP), 2023 — NAICS 811310 establishments, employment, and payroll. https://www.census.gov/data/datasets/2023/econ/cbp/2023-cbp.html
2. U.S. Census Bureau, 2022 Economic Census, EC2200SIZECONCEN — Concentration of Largest Firms — NAICS 811310 firms, receipts, CR4/CR8/CR20/CR50 (HHI suppressed). https://data.census.gov/table/ECNSIZE2022.EC2200SIZECONCEN
3. U.S. Small Business Administration, Table of Size Standards, 2023 — NAICS 811310 ($12.5 million average annual receipts). https://www.sba.gov/document/support-table-size-standards
4. U.S. Census Bureau, 2022 NAICS Manual — code 811310, Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance. https://www.census.gov/naics/reference_files_tools/2022_NAICS_Manual.pdf
5. IBISWorld, Machinery Maintenance & Heavy Equipment Repair Services in the US — Industry Report and Market Size (NAICS 811310), 2025–2026. https://www.ibisworld.com/united-states/industry/machinery-repair-maintenance/1708/
6. U.S. Bureau of Labor Statistics, Producer Price Index Introduced for Commercial and Industrial Machinery and Equipment Repair and Maintenance — NAICS 811310. https://www.bls.gov/ppi/factsheets/producer-price-index-introduced-for-commercial-and-industrial-machinery-and-equipment-except-automotive-and-electronic-repair-and-maintenance-naics-811310.htm
7. Federal Reserve Board, Industrial Production and Capacity Utilization (G.17), Table 7. https://www.federalreserve.gov/releases/g17/Current/table7.htm
8. U.S. Bureau of Labor Statistics, Industrial Machinery Mechanics, Machinery Maintenance Workers, and Millwrights — Occupational Outlook Handbook (13% projected growth, 2024–2034). https://www.bls.gov/ooh/installation-maintenance-and-repair/industrial-machinery-mechanics-and-maintenance-workers-and-millwrights.htm
9. Occupational Safety and Health Administration, 29 CFR 1910.147 — The Control of Hazardous Energy (Lockout/Tagout). https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.147
10. Occupational Safety and Health Administration, 29 CFR 1910.178 — Powered Industrial Trucks. https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.178
11. U.S. Environmental Protection Agency, Section 608 Technician Certification Requirements (Clean Air Act, 40 CFR Part 82, Subpart F). https://www.epa.gov/section608/section-608-technician-certification-requirements
12. National Conference of State Legislatures, Right to Repair 2023 Legislation (incl. Colorado agricultural-equipment right-to-repair law). https://www.ncsl.org/technology-and-communication/right-to-repair-2023-legislation
13. Reshoring Initiative, 2024 / Q1-2025 Data Report — announced U.S. manufacturing reshoring and investment. https://reshorenow.org/content/pdf/2024-1Q2025_RI_DATA_Report.pdf
14. Manufacturing Today, Why Predictive Maintenance Is Manufacturing's Next Big Advantage — prevalence of reactive/time-based maintenance and deferred-upkeep backlog. https://manufacturing-today.com/news/why-predictive-maintenance-is-manufacturings-next-big-advantage/
15. Flowserve Corporation, Quick Response Centers / Aftermarket Services and FY2024 results (~$4.6B revenue; services/aftermarket 40%+ of sales). https://www.flowserve.com/services/quick-response-centers/
16. DXP Enterprises, Inc., Form 10-K, Fiscal Year 2024 — total sales ~$1.8B; Service Centers, Innovative Pumping Solutions, Supply Chain Services segments. https://www.sec.gov/Archives/edgar/data/1020710/000102071025000036/dxpe-20241231.htm
17. Applied Industrial Technologies, Inc., Fiscal 2024 Full-Year Results — net sales ~$4.5B; Service Center Based Distribution and Engineered Solutions segments. https://www.sec.gov/Archives/edgar/data/109563/000010956324000063/a8k8152024releaseexhibit991.htm
18. Alta Equipment Group Inc., 2025 Form 10-K / Annual Report — total revenue ~$1.84B; parts $291.0M, service $256.7M, new/used equipment $999.3M. https://www.sec.gov/Archives/edgar/data/1759824/000119312526076932/altg-20251231.htm
19. Titan Machinery Inc., Quarterly Results (Form 8-K) — parts and service as roughly half of dealer gross profit. https://www.sec.gov/Archives/edgar/data/0001409171/000110465913088507/a13-25691_1ex99d1.htm
20. Konecranes, Annual Review 2025 — global crane and industrial-equipment service business. https://investors.konecranes.com/sites/konecranes/files/Annual_report_2025/annual_review_2025.pdf
21. EquipmentShare, EquipmentShare Debuts on Nasdaq as "EQPT" — rental, parts, and repair services. https://www.equipmentshare.com/press-releases/equipmentshare-debuts-on-nasdaq-as-eqpt-advancing-the-digital-transformation-of-construction
22. United Rentals, Customer Equipment Solutions / Equipment Service & Maintenance. https://www.unitedrentals.com/services/equipment-service-maintenance
23. Herc Holdings Inc., Acquisition of H&E Equipment Services (~$5.3 billion, completed 2025); 2025 Form 10-K. https://www.sec.gov/Archives/edgar/data/1364479/000136447926000050/hri-20251231.htm
24. Sunbelt Rentals Holdings, Sunbelt Rentals Shares Begin Trading on New York Stock Exchange. https://ir.sunbeltrentals.com/filings/sec-filings/content/0001193125-26-085376/d121042dex991.htm
25. Otis Worldwide, 2025 Form 10-K — elevator/escalator maintenance and repair (adjacent building-equipment proxy). https://www.sec.gov/Archives/edgar/data/1781335/000178133526000011/otis-20251231.htm
26. Caterpillar Inc., 2025 Form 10-K — construction/mining/power OEM with independent dealer service network and recurring aftermarket. https://www.sec.gov/Archives/edgar/data/18230/000001823026000008/cat-20251231.htm
27. Crown Equipment, About Crown — privately held material-handling manufacturer with company-owned and independent service dealers. https://www.crown.com/en-us/about-us.html
28. Briggs Equipment, About Us — ESOP-owned full-service material-handling company (Sammons Industrial). https://www.briggsequipment.us/about/
29. Rotunda Capital Partners, Rotunda Acquires and Combines American Equipment, Pacific Crane & Hoist and Allied Crane — overhead-crane service roll-up (American Equipment Holdings). https://www.rotundacapital.com/rotundacapitalpartnersacquiresandcombinesamericanequipment/
30. American Crane & Equipment Corporation, Capabilities Statement — privately held crane and hoist inspection, preventive maintenance, emergency repair, and parts. https://www.americancrane.com/capabilities-statement/