NAICS 332710 · Manufacturing
OSHA Recordkeeping for Machine Shops
A machine shop is usually a single establishment: one building where the work is done (29 CFR 1904.46). The case type shops most often miss is hearing loss. It goes on the log when an annual audiogram shows a standard threshold shift and the hearing level in that ear is 25 dB or more above audiometric zero (1904.10), and it is checked in the hearing loss column, M5.
Who keeps and files OSHA records
NAICS 332710 is not on OSHA's partially exempt list, so the size rule decides the log (29 CFR 1904.1 (opens in a new tab)) and the filing appendices decide what goes to OSHA (1904.41 (opens in a new tab)).
- OSHA 300, 300A and 301
- Required
- Once the company passes 10 employees at any time in the year.
- 300A e-filing by March 2
- From 20 employees
- Per establishment; appendix A industry.
- 300 and 301 case data
- From 100 employees
- Per establishment; appendix B industry.
2024 injury rates for machine shops
Cases per 100 full-time workers, as published by BLS for NAICS 33271, machine shops. The TRIR of 2.7 is above the private-industry rate of 2.3.
- Total recordable (TRIR)
- 2.7
- Columns H, I and J
- Days away, restricted or transferred (DART)
- 1.5
- Columns H and I
- Days away from work
- 0.6
- Column H
| Full-time employees | Hours worked a year | Cases at TRIR 2.7 |
|---|---|---|
| 25 | 50,000 | 0.7 |
| 50 | 100,000 | 1.4 |
| 100 | 200,000 | 2.7 |
Your rate is recordable cases × 200,000 ÷ hours worked; the TRIR calculator works it out from your 300A.
Recordable or not: cases from machine shops
- Removing a metal chip from an eye with irrigation or a cotton swab is first aid. Any other method makes the case recordable. (29 CFR 1904.7(b)(5)(ii)(J))
- A fingertip amputation, with or without bone loss, has to be reported to OSHA within 24 hours. (29 CFR 1904.39(b)(11))
For a case of your own, the recordable checker walks through the same rules.
What 29 CFR 1904 requires
OSHA 300 log
Each recordable case, within 7 calendar days. 1904.29(b)(3) (opens in a new tab)
OSHA 301 report
One per case, same 7 days; an equivalent form works. 1904.29(b)(4) (opens in a new tab)
OSHA 300A summary
Certified by an executive, posted February 1 to April 30. 1904.32 (opens in a new tab)
Privacy cases
Six case types keep the name off the log. 1904.29(b)(7) (opens in a new tab)
Severe injury reports
Fatality in 8 hours; hospitalization, amputation, eye loss in 24. 1904.39 (opens in a new tab)
Retention
All three forms kept five years. 1904.33 (opens in a new tab)
Hazards OSHA addresses for this work
Machine Shops: recordkeeping questions
Does a machine shop with 15 employees have to keep an OSHA 300 log?
Yes. Machine shops aren't partially exempt by industry, so a company with more than 10 employees at any point last year keeps the 300 log, the 300A and the 301 forms (29 CFR 1904.1). The count is company-wide: two shops with 6 people each make 12 employees, and each shop keeps its own log.
Does a machine shop have to e-file with OSHA by March 2?
Manufacturing is in appendix A to 29 CFR 1904.41, so a shop with 20 or more employees at any time last year submits its 300A through OSHA's Injury Tracking Application by March 2. Machine shops, NAICS 3327, are also in appendix B: from 100 employees, the shop submits its 300 and 301 case data too, under the establishment's EIN (1904.41(a)(4)).
What goes on the 300 log, and what goes on the 300A, in a machine shop?
Each recordable injury goes on the 300 log within 7 calendar days (29 CFR 1904.29(b)(3)): a cut closed with sutures, a chip taken out of an eye with anything more than irrigation or a cotton swab, a hearing loss case. The 300A totals those lines once a year, adds hours worked and average headcount, and is posted from February 1 to April 30 once a company executive certifies it (1904.32). The 2024 average for machine shops was 2.7 recordable cases per 100 full-time workers.