Light Manufacturing, Warehouse & Drivers
Class Code 3632: Machine Shop NOC — Workers' Comp Insurance
Covers machine shops that manufacture or repair metal parts and components using machine tools such as lathes, mills, and grinders. It's a broad, catch-all classification for general machining work not falling under a more specific manufacturing code.
- Risk level:
- elevated
What code 3632 covers
Class 3632 applies to machine shops performing precision metalworking using lathes, milling machines, grinders, drill presses, and similar machine tools to produce or repair metal parts and components. The work involves close contact with moving machinery, metal chips and swarf, and the use of cutting fluids and coolants, all of which are central to this classification's elevated risk profile. This is an NOC classification, meaning it applies broadly to general machine shop work; businesses manufacturing a specific, more narrowly classified product may fall under a different, product-specific manufacturing code instead. Machine shops performing both production manufacturing and repair/rebuild work for outside customers are typically covered under this same classification regardless of that mix.
Included operations
- Lathe, milling machine, and grinder operation
- Precision metal cutting and machining of parts
- Machine setup, tooling, and quality inspection
- Repair and rebuild of metal components and machinery parts
Assigned elsewhere
- Electrical apparatus manufacturing — see code 3179
- Sheet metal fabrication shops — see code 5538
- Welding performed as a standalone contracting service away from a shop, evaluated under the applicable classification
- Products with their own specific manufacturing classification, evaluated under that more specific code
Businesses that typically carry 3632
- Precision machine shops
- Metal parts manufacturers
- Machinery repair and rebuild shops
- Small and mid-size production shops
- Contract manufacturers serving other businesses
- Regional production and distribution facilities
Common misclassifications
Code 3179
Machine shops that also assemble electrical apparatus or components can blend two distinct manufacturing classifications if that scope isn't tracked separately.
Code 5538
Machine shops that also do sheet metal fabrication for customers can blend two distinct manufacturing classifications if that scope isn't tracked separately.
Compare up to 10 carriers in minutes.
One application goes out to every carrier we can access for your class of business. You get a ranked comparison you can review and purchase online — with a licensed agent available whenever you want one.
Mon–Fri, 8:00am–6:00pm ET · Independent agency licensed in 23 states
What drives the cost of code 3632
- Total annual payroll for employees assigned to this classification
- Experience modification factor based on claims history
- State-specific base rates and loss costs filed for this class code
- Claims frequency and severity trends for the business
- Safety programs, training, and workplace controls in place
- Payroll mix across multiple classifications at the same location
What underwriters look for
- Machinery and equipment used, including guarding and lockout/tagout procedures
- Shift patterns, overtime, and production volume
- Prior claims history, especially repetitive-motion and machine-related injuries
- Safety program documentation and OSHA history
State differences
This entry uses standard NCCI class code phraseology, which applies in most NCCI-governed states. Pennsylvania (PCRB), Delaware (DCRB), California (WCIRB), New Jersey (NJCRIB), Michigan, New York (NYCIRB), and Massachusetts maintain their own classification manuals, and code numbers or phraseology can differ there. Our agency confirms the correct classification for your state before quoting.
Quote class code 3632.
One application goes out to every carrier we can access for your class of business. You get a ranked comparison you can review and purchase online — with a licensed agent available whenever you want one.
Mon–Fri, 8:00am–6:00pm ET · Independent agency licensed in 23 states
Class code 3632 questions
Does this code cover both manufacturing new parts and repairing existing ones?
Yes, 3632 covers machine shop work broadly, whether producing new parts or repairing and rebuilding existing components.
What kind of equipment is central to this classification?
Lathes, milling machines, grinders, and similar precision machine tools are the core equipment this class is built around.
Does this apply to a shop that makes a very specific type of product?
If that product has its own more specific NCCI manufacturing classification, that code would typically apply instead of the general machine shop NOC code.
Is this a higher-risk classification?
Yes, close contact with moving machinery and metalworking equipment places this classification on the higher end of the manufacturing risk spectrum.
Last reviewed · Reviewed by Provident Financial Group licensed agents