Stationary vs. trailed TMR mixer: which type fits your farm?
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TMR Mixer Buying Guide · HerdMech
Stationary vs. Trailed TMR Mixer:
Which Type Fits Your Farm?
Both mixer types deliver consistent, high-quality total mixed rations — but they serve very different farm setups. Before you invest, here's the complete side-by-side comparison to help you choose with confidence.
Quick Answer
Know what you need? Jump straight to the right machine.
Centralized feed center · High-volume · Electric-powered
Tractor-pulled · Mix & distribute · Versatile
Why It Matters
The wrong mixer type costs more than just money
Choosing a TMR mixer is one of the most consequential equipment decisions on a modern dairy or beef farm. Get it right, and you unlock lower labor costs, consistent ration quality, and better herd performance. Get it wrong, and you're fighting the machine every day — wasting tractor time, re-routing feed logistics, or running an undersized unit that limits your growth.
The question of stationary versus trailed often comes down to three things: the scale of your operation, your farm's physical layout, and whether you want to integrate with centralized automation or keep things simple and tractor-based. Neither type is universally better. Both are proven, widely used, and available in a range of capacities — including the full HerdMech lineup from 5 CBM to 50 CBM.
This guide walks through how each type works, what it costs to run, and which farm scenarios call for which machine — so you can make the decision once and make it well.
How They Work
Two different approaches to the same goal
Fixed at the feed center. Built for volume.
- Permanently installed on a concrete base at the feed preparation area
- Powered by a 3-phase electric motor — no tractor needed during mixing
- Ingredients are loaded into the stationary unit (by wheel loader or conveyor)
- Mixed ration is discharged via side belt or under-floor conveyor into a distribution vehicle
- Easily integrated with automatic weighing and ingredient dosing systems
- Available in single- or dual-auger configurations for different ration types
- HerdMech range: 5 CBM to 50 CBM (9JGL series)
Goes where your tractor goes. Simple and mobile.
- Hitched to a farm tractor via the drawbar and driven anywhere on the farm
- Powered by the tractor's PTO shaft — no external power connection required
- Tractor and mixer move together during both loading and feeding
- Discharge directly into the feed bunk while driving alongside — no separate vehicle needed
- Can feed multiple barns, pens, or separate pasture groups in a single circuit
- Lower initial investment with no installation or civil work required
- HerdMech range: available in multiple capacities
Side-by-Side Comparison
Stationary vs. Trailed TMR Mixer — 12 key factors
| Factor | 🏭 Stationary TMR Mixer | 🚜 Trailed TMR Mixer |
|---|---|---|
| Power Source | Electric motor (3-phase mains power) | Tractor PTO shaft |
| Mobility | ✗ Fixed in place | ✓ Fully mobile with tractor |
| Installation Required | Yes — concrete base, electrical supply | ✓ None — ready to use immediately |
| Upfront Cost | Higher (machine + civil works + electrical) | Lower (machine only) |
| Daily Running Cost | Lower — electricity is cheaper than diesel | Higher — tractor fuel + operator time |
| Typical Herd Size | 200 – 2,000+ cows | 30 – 500 cows |
| Capacity Range | 5 CBM to 50 CBM | 4 CBM to ~25 CBM |
| Multi-Barn Feeding | Requires a separate distribution vehicle (e.g. TMR feeding truck) | ✓ Tractor drives to each barn directly |
| Automation Integration | ✓ Excellent — links easily to ingredient conveyors, weighing, and control systems | — Limited — manual loading typical |
| Tractor Dependency | ✓ None during mixing | Yes — tractor must be available |
| Mixing Throughput | High — can run continuous batches without moving | Moderate — one batch per circuit |
| Best Fit | Single-site large dairy, feed center design, automation | Smaller/medium farms, multiple locations, simple setup |
Scenario Guide
What does your farm situation look like?
The Bottom Line
Summary: Who should choose what
HerdMech Recommendation
There's no wrong answer — only the wrong fit for your farm.
- 200+ cows or planning to grow to that size
- Feed center already designed or under construction
- You want to reduce daily tractor hours in feed prep
- You're adding a TMR feeding truck for distribution
- Lower long-term operating cost matters most
- Automation (auto-weighing, conveyor loading) is a priority
- Herd size is under 300 and unlikely to change soon
- You already have a suitable tractor (75 HP+)
- Farm layout requires feeding in different locations
- You want to avoid civil installation work
- Budget is tighter or capital is being used elsewhere
- Single operator needs to mix and feed in one pass
Frequently Asked Questions
Common questions about TMR mixer types
Can a stationary TMR mixer be used without a separate distribution vehicle?
In most setups, no. A stationary mixer is fixed at the feed preparation point, so a separate vehicle — typically a TMR feeding truck or belt wagon — is needed to transport and distribute the mixed ration to the feed bunk. This is actually an advantage on large farms, as the loading, mixing, and feeding tasks can all run concurrently, maximising throughput.
What size tractor is needed to run a trailed TMR mixer?
As a general rule, allow around 4–5 HP per cubic metre of mixer capacity. A 10 CBM trailed mixer typically requires a tractor in the 75–100 HP range. Larger units (16 CBM+) may need 120 HP or more. Always check the manufacturer's minimum PTO power recommendation for the specific model you're considering.
Which type gives a better quality mix — stationary or trailed?
Both types can produce an excellent total mixed ration when correctly specified and operated. Mix quality depends far more on auger design, knife configuration, loading order, and mix duration than on whether the unit is stationary or trailed. HerdMech's TMR mixers — both types — feature 14mm double-layer wear-resistant augers and tungsten carbide-coated blades engineered for a fluffy, uniform ration with zero dead corners.
Is a stationary TMR mixer cheaper to run than a trailed mixer in the long term?
Generally yes, on a cost-per-batch basis. Electricity is significantly cheaper than diesel per unit of energy, and a stationary mixer frees the tractor for other tasks during feed preparation. On large operations mixing 3–5 batches per day, the energy saving alone can be substantial over a season. However, the higher upfront cost (machine + civil installation + electrical supply) means the break-even point is typically at 200+ cows.
Does HerdMech offer both stationary and trailed TMR mixers?
Yes. HerdMech manufactures and supplies both types — along with truck-mounted and self-propelled options. All models are CE-certified, come with a 2-year warranty, and are available with DDP worldwide delivery direct to your farm. Contact the team for a capacity recommendation tailored to your herd size.
Ready to choose your TMR mixer?
Browse HerdMech's full range — stationary mixing stations from 5 to 50 CBM, and trailed mixers for every herd size. Factory-direct pricing, CE-certified, shipped DDP to your farm.
Published by the HerdMech Editorial Team. Updated 2025. All product specifications subject to confirmation with HerdMech sales team.
Related reading: Full TMR Mixer Range · TMR Feeding Trucks · Contact HerdMech