A collar harness is the most efficient way to use a horse’s or mule’s power: a padded oval collar sits on the shoulders with 2-3 cm of clearance around the neck, hames clamp to the collar, and traces carry the pull back to the load. It handles heavier loads than a breast harness, which causes chest sores once loads pass roughly 150-200 kg on flat ground.
Part of Harness & Yoke Making
The collar system for horses and mules: what its parts are, why it carries heavy loads, and where to go for building and fitting.
The Collar Puts The Pull On The Shoulders, Not The Throat
The collar harness distributes pulling force across the shoulders and chest, so the animal can lean into the work with its full body weight. Because the pad rests on the muscle of the shoulders and the opening clears the windpipe, the animal breathes freely under load. A breast harness spreads the force over a smaller area and is reserved for lighter loads.
The system has three parts, each with its own article:
- The collar — the padded oval on the shoulders. See Building the Collar.
- Hames and traces — the clamps and straps that carry the pull. See Hames & Traces.
- Fitting — pressure points, clearance and refitting. See Fitting & Adjustment.
For the wider design theory, including trace angle and breeching, see Harness Design.
What You Need
- A hardwood or laminated frame — ash, oak or hickory, steam-bent.
- Leather or canvas for the outer shell, with smooth leather or canvas on the inner face.
- Stuffing — straw, wool, cattail fluff or salvaged foam.
- Hames and traces — wood or metal hames, with leather, chain or strong rope traces.
- The animal to measure — no two necks are the same.
Method: Choose The Harness By The Load
Step 1: Estimate the load. The source quotes 150-200 kg on flat ground as the point where a breast harness begins to cause chest sores. It does not say whether the vehicle counts toward that figure, so count the cargo and the vehicle together to stay safe.
Step 2: Under that, a breast harness is enough. For light carts and occasional hauling, see Breast Harness.
Step 3: Over that, use a collar. Build or find a collar that fits this animal. See Building the Collar.
Step 4: Fit before work. A collar that rocks, pinches or lies on the throat is worse than none. See Fitting & Adjustment.
Worked Example
A cart weighs about 80 kg (an assumed figure) and carries 150 kg of firewood on flat ground. The load is 80 + 150 = 230 kg, above the 150-200 kg limit, so use a collar. The 150-200 kg figure is a load in kilograms of mass; it is not the pull in newtons the animal exerts, which depends on the surface and wheels, and the source does not give it.
Common Mistakes
- Using a breast harness past its limit — chest sores develop. Switch to a collar.
- Taking the first collar that fits over the head — it must fit the shoulders and neck of this animal.
- Ignoring seasonal condition change — a fat horse and a thin horse need different fit.
Safety
A harness failure under load can injure animal and driver
A broken trace or hame recoils, and a collar on the throat restricts breathing. Inspect traces, hames and straps before every use, and check that the collar clears the windpipe. Keep a quick release at the hitch so a bolting animal can be freed from the vehicle.
What’s Next
- Learn next: Building the Collar — frame, padding and shape
- Combine with: Cart Introduction — the first hitching