You can have the biggest mixer on the yard and still spend more time loading than mixing. It happens every day on operations that sized their tub correctly and never once looked at how high the loader has to climb to get there. With corn silage fast approaching in the Midwest and feedlots building up inventory ahead of fall, this is exactly the wrong time to find out your loader is the constraint, not your mixer.
How Loading Height Multiplies Across a Batch
Think through the arithmetic. A typical 14 m³ (494 ft³) batch on a mid-sized dairy might require 18 to 24 loader buckets depending on silage density and what else is going in. Each extra foot of lift height adds roughly two to four seconds per bucket when you factor in the loader slowing to reach peak height, the slight hesitation at the top, and the drop back down. That sounds like nothing.
Run the numbers. Twenty buckets at three extra seconds per bucket is a minute per batch. Four batches a day is four minutes. Across a 300-day feeding year, you have just burned 20 hours on a single crew and a single machine, and that is a conservative estimate. On operations running six or eight batches daily, the number gets uncomfortable fast.
Height also puts stress on the loader itself. Telescopic handlers and skid steers operating at or near their maximum reach are slower, less stable, and burning more fuel than they do at mid-range lift. Operators know this instinctively. What they do not always account for is the cumulative effect on throughput over thousands of feeding cycles.
What Published Loading Heights Actually Tell You
Manufacturers publish loading height as the measurement from ground level to the top of the mixer tub wall where feed is deposited. That number determines two things: which loader you need to work efficiently with the machine, and whether the mixer can benefit from a pit, a drive-over bunk, or a low silage face arrangement.
Smaller machines tend to have genuinely low figures. The 7006 VT, a 6 m³ (212 ft³) dual-auger unit in the LEO Agriculture VT Series catalog, lists a loading height of 1.98 m (78 inches). The 7003 single-auger compact unit drops to 1.88 m (74 inches). Those figures are manageable with a standard skid steer operating well below its rated lift capacity, which keeps cycle times short and fuel consumption down.
The tradeoff, as any feedlot manager knows, is that smaller tubs mean more batches per day to hit the same headcount. If you are sizing for a growing herd, getting that batch count right before you buy is more valuable than chasing the lowest possible loading height.
Larger commercial machines climb higher because the tub volume demands more wall depth. That is physics, not a design flaw. But it does mean your loader choice and your yard layout need to be thought through before the mixer arrives, not after.
Pit Siting and Loader Matching
A shallow pit or a drive-over pad alongside the silage face can recover most of the height penalty on a large mixer. Dropping the mixer 18 inches (460 mm) into a concrete pad recesses the working load height by the same amount. On a machine with a 3.2 m (126-inch) load height, that single piece of yard infrastructure brings you back into the comfortable operating range of most telehandlers without any modification to the machine itself.
The alternative is matching your loader to the published spec. A telehandler rated to lift comfortably at 3.5 m (138 inches) with a full bucket will handle most large mixer heights without laboring. The key word is comfortably. A loader operating near its rated maximum height is slower, tips the nose up under load, and puts wear on the frame and mast that compounds over seasons. Size for 80 percent of rated height, not 100.
Single-axle mixers can sometimes be positioned closer to the face or under a bunker overhang in ways that tandem-axle units cannot. If yard flexibility matters to your operation, that tradeoff is worth thinking through before committing to a configuration.
A Simple Timing Check You Can Run This Week
Before you redesign your yard or spec a new loader, do this. Pick a typical batch day and time four consecutive loader cycles from the moment the bucket starts to lift to the moment the operator is driving back for the next scoop. Write down the height at which the bucket tips into the mixer relative to what looks like the loader’s comfortable mid-range.
If tip height is above roughly 75 percent of the loader’s rated lift, you are in the slow zone. Now calculate total loader time for that batch and compare it against your recorded mix time. On a well-designed vertical mixer with good auger geometry and a decagonal tub that prevents feed from spinning rather than cutting, mix time on a standard ration should be short. If your loader time is running equal to or longer than your mix time, the loader height is the bottleneck.
This check costs you 20 minutes and a stopwatch. The fix might be as simple as reshaping the silage face lower rather than pushing it back, which reduces working height without moving any infrastructure. Silage operators in Wisconsin and across the Corn Belt commonly manage face height for loading efficiency during peak summer feeding, but they are usually thinking about face quality, not loader geometry. Both matter.
Tub Design Affects More Than Height
Loading height is a fixed spec. What happens once feed is in the tub is where design differences actually show up in daily throughput. A tub with flat decagonal walls creates friction against bales rather than letting them rotate freely, so the auger cuts into material more aggressively and mix time drops. Less time in the bowl per batch means more batches per hour if your loading cycle is not the constraint.
The interaction between auger design, tub geometry, and mix speed is worth understanding in detail if you are deciding between machine sizes. How tub floor geometry cuts mix time and HP demand gets into the specifics of how that works mechanically.
The short version: a mixer that processes faster reduces the window in which your loader is idle waiting for the tub to clear. If your loader height at the face is already at the margin, every minute shaved from mix time gives that loader more breathing room in the daily schedule.
Before the Next Corn Silage Push
Corn silage harvest is close enough that planning changes now is still practical. If a timing check reveals that loading height is eating your throughput, the lowest-cost fixes are sequenced as follows: reshape the silage face to the lowest practical working height, evaluate whether a shallow pit is feasible in your yard, then look at whether your current loader is operating above its efficient lift range. A new mixer or a new loader is the last resort, not the first move.
Published loading heights in product catalogs are not marketing numbers. They are real constraints that interact with your specific loader, your silage face height, and your yard layout. Match them carefully before buying, and you will not be retrofitting your infrastructure six months after delivery.
