Used feed mill equipment for existing mills: checklist and upgrade cost worksheet
This page is for operators upgrading a line they already run. Used equipment can shorten lead times, but only if its condition, fit with your line and full installed cost are checked. FeedMatch lists no sellers, prices or stock here; every figure in the worksheet comes from your own quotes.
When used equipment fits — and when it doesn't
| Situation | Used can fit | Prefer new or retrofit |
|---|---|---|
| Replacing one bottleneck machine | Same make/model as your line, spares available | Model discontinued, no parts source |
| Adding a parallel line | Inspected units with documented history | No inspection access before purchase |
| Tight lead time | Unit available and inspectable now | Refurbishment time cancels the gain |
| Safety or hygiene upgrade | Rarely — guards and controls may be outdated | Usually: compliance is the purpose |
What to inspect before you buy
Pellet mill
- Die and roller wear, spare dies for your recipes
- Main bearings, gearbox or belt drive: noise, play, oil analysis if available
- Conditioner paddles, steam valves and feeder condition
- Motor rating and plate data versus your power supply
Hammer mill and mixer
- Rotor balance, hammer and screen wear
- Mixer ribbons/paddles, discharge gate seal, documented mix uniformity test
- Residue build-up and cleanability for your medicated or allergen-sensitive runs
Cooler, conveyors and controls
- Cooler size and airflow versus your pellet output
- Chain, bucket and belt wear
- PLC and drives: are the brand and software still supported?
- Dust control and explosion venting equipment and its documentation
Documents to request
- Proof of ownership and that the equipment is free of liens
- Manufacturer, model, serial number and year
- Maintenance and repair records, and why the unit was removed
- Electrical drawings and manuals
- Recent run video or a live run you can witness
- What is included: motors, controls, spares, dismantling, loading
- Written condition statement and any warranty or return terms
Cost-of-upgrade worksheet: used vs new vs retrofit
Fill in each column from written quotes in the same currency. Leave a cell blank rather than guess; a blank cell is a question for the supplier.
| Cost line | Used unit | New unit | Retrofit existing |
|---|---|---|---|
| Purchase price | |||
| Inspection and testing | |||
| Dismantling, loading and freight | |||
| Import duty and taxes (if any) | |||
| Refurbishment and wear parts | |||
| Foundations, structure and connections | |||
| Electrical and controls integration | |||
| Installation and commissioning | |||
| Training | |||
| Downtime of the existing line (days × your margin per day) | |||
| First-year spares | |||
| Total installed cost |
Formulas to apply to your figures
- Initial upgrade cost = sum of the individual cost lines; do not add the total row to itself. Keep recoverable taxes and working capital separate.
- Added saleable output (t/year) = (post-upgrade measured line output − current measured line output, in t/h on the same recipe) × comparable operating hours per year. Cap the scenario at output you can actually use or sell; a machine nameplate is not whole-line evidence.
- Annual net benefit = added saleable output × contribution per tonne + separately evidenced annual savings − additional annual operating costs. Do not count costs already deducted in contribution or duplicate savings.
- Simple payback (years) = initial upgrade cost ÷ annual net benefit, only when net benefit is positive and all inputs are known. Otherwise report no calculable payback. This excludes discounting; FeedMatch supplies no margins and promises no return.
- Cost per added t/h = initial upgrade cost ÷ positive increase in measured whole-line output (t/h). This is not cost per tonne produced.
Red flags
- Seller refuses an inspection or a witnessed run
- No serial numbers or ownership proof
- Price only valid for immediate payment
- Missing guards, interlocks or dust control parts
- Controls no longer supported by the manufacturer
Sources for safety and compliance checks
- FAO / IFIF — Good practices for the feed sector (2020 manual)
- OSHA — Grain handling
- OSHA — Control of hazardous energy (lockout/tagout)
- NFPA 660 — Combustible dusts (consolidates NFPA 61; confirm locally adopted edition)
- FDA — FSMA preventive controls for animal food
Requirements depend on your country and site. Confirm with your safety adviser, insurer and local authority; these links are starting points, not a compliance review.
Sources checked: 2026-10-16
Related guides for existing mills
Request quotes for used, new or retrofit equipment
Describe the line you run and the upgrade you need. A person on the FeedMatch team reads every request before contacting suppliers. Free for buyers.