# NAICS 333613: Mechanical Power Transmission Equipment Manufacturing

Breadcrumb: [NAICS codes](https://bidrover.com/naics) › [333613 Mechanical Power Transmission Equipment Manufacturing](https://bidrover.com/naics/333613)

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.

- NAICS code: 333613
- Title: Mechanical Power Transmission Equipment Manufacturing
- Sector: 31-33 Manufacturing
- Subsector: 333 Machinery Manufacturing
- Industry group: 3336 Engine, Turbine, and Power Transmission Equipment Manufacturing
- NAICS industry: 33361 Engine, Turbine, and Power Transmission Equipment Manufacturing
- SBA size standard: 750 employees
- Open bids on BidRover: 5
- Updated: Oct 13, 2026

## Open bids (5)

- [30--COOLER,FLUID,TRANSMISS](https://bidrover.com/bids/30-cooler-fluid-transmiss--791cd993-c6bd-4f1d-9023-f09a90221e2e) — General procurement · United States · due 2026-10-23
- [25--PROPELLER SHAFT,VEHICU](https://bidrover.com/bids/25-propeller-shaft-vehicu--2d803e33-ac70-471c-8025-ad00519c6c22) — General procurement · United States · due 2026-10-23
- [25--TRANSFER TRANSMISSION](https://bidrover.com/bids/25-transfer-transmission--474544d5-dc72-4a81-bce2-1406f4801c4f) — General procurement · United States · due 2026-10-27
- [30--ACTUATOR,MECHANICAL,NO](https://bidrover.com/bids/30-actuator-mechanical-no--2adc27d7-acc0-439d-ab7e-38f7ce378c5c) — General procurement · United States · due 2026-10-27
- [25--SHAFT,AXLE,AUTOMOTIVE](https://bidrover.com/bids/25-shaft-axle-automotive--9693c605-a17f-42dc-aade-a55db8920c25) — General procurement · United States · due 2026-10-23

## Frequently asked questions

### What is NAICS code 333613?

NAICS 333613 is "Mechanical Power Transmission Equipment Manufacturing" in the 2022 North American Industry Classification System, in sector 31-33 (Manufacturing). 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.

### What is the SBA size standard for NAICS 333613?

A business is small under NAICS 333613 at or below 750 employees, including affiliates (13 CFR 121.201). Confirm the standard named in each solicitation.

### How many government bids are open under NAICS 333613?

BidRover counts 5 open bids that cite NAICS 333613 as of Oct 13, 2026, refreshed every hour from official public sources. Many state and local notices do not list a NAICS code, so search by keyword too.

### How do I get alerts for NAICS 333613 bids?

Save an alert on this page. A free account gets new matching bids by weekly email; the Team plan ($19/mo) sends daily alerts with match scores, the buyer, source link and documents.

## Related NAICS codes

- [336350 Motor Vehicle Transmission and Power Train Parts Manufacturing](https://bidrover.com/naics/336350)
- [336413 Other Aircraft Parts and Auxiliary Equipment Manufacturing](https://bidrover.com/naics/336413)
- [332991 Ball and Roller Bearing Manufacturing](https://bidrover.com/naics/332991)
- [333612 Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing](https://bidrover.com/naics/333612)
- [333611 Turbine and Turbine Generator Set Units Manufacturing](https://bidrover.com/naics/333611)
- [333618 Other Engine Equipment Manufacturing](https://bidrover.com/naics/333618)

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Code titles and definitions: U.S. Census Bureau, North American Industry Classification System (NAICS), 2022 (https://www.census.gov/naics/). Size standards: U.S. Small Business Administration, Small Business Size Standards, 13 CFR 121.201, eCFR text current as of 2026-10-21 (https://www.ecfr.gov/current/title-13/section-121.201).

BidRover lists bids from official public sources. It is not an issuing authority; confirm the NAICS code and size standard named in each solicitation.