333613 — Mechanical Power Transmission Equipment Manufacturing
Description
This U.S. industry comprises establishments primarily engaged in manufacturing mechanical power transmission equipment (except motor vehicle and aircraft), such as plain bearings, clutches (except motor vehicle and electromagnetic industrial control), couplings, joints, and drive chains.
Exclusions & Cross-References
- Manufacturing motor vehicle power transmission equipment--are classified in Industry 336350, Motor
- Vehicle Transmission and Power Train Parts Manufacturing;
- Manufacturing aircraft power transmission equipment--are classified in U.S. Industry 336413, Other
- Aircraft Parts and Auxiliary Equipment Manufacturing;
- Manufacturing ball and roller bearings--are classified in U.S. Industry 332991, Ball and Roller Bearing
- Manufacturing; and
- Manufacturing gears, speed changers, and industrial high-speed drives (except hydrostatic)--are classified
- in U.S. Industry 333612, Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing.
Overview Facts
| NAICS Code | 333613 |
|---|---|
| Industry Title | Mechanical Power Transmission Equipment Manufacturing |
| SBA Size Standard | 750 employees |
| IRS PBA Code | 333610 (rolled-up match) |
| Sectors Hierarchy | Sector 31-33 → 333 → 3336 |
| Source / Verified | US Census 2022 NAICS Manual / 2026-06-28 |
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 3568 - Mechanical Power Transmission Equipment, NEC (via SIC1987:3568→NAICS1997:333613→2002:333613→2007:333613→2012:333613→2017:333613→2022:333613)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 333613:
- Sector 31-33 Directory Hub — List of related industries in the Manufacturing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.
Related Industries in 3336
Frequently Asked Questions (FAQ)
Is 333613 a valid 2022 NAICS code?
NAICS 333613 is 'Mechanical Power Transmission Equipment Manufacturing', a 2022 U.S. national industry under Sector 31-33 (Manufacturing); the SBA small-business size standard is 750 employees.
What is the SBA size standard for NAICS 333613?
The SBA small business size standard for NAICS 333613 is 750 employees (based on employees).
What is the legacy SIC code mapping for 333613?
NAICS code 333613 maps to the legacy 1987 SIC codes: 3568 - Mechanical Power Transmission Equipment, NEC.