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Read articles →Tim debuts his own custom 34-inch stump grinder design, a departure from the common 24-inch units, explaining the engineering logic behind the larger diameter and increased tooth count to reduce jumping and deliver more bites per second. The video shows a first real-world grind on a silver maple stump, with operating tips on bite size, chip size as an effectiveness indicator, and why to skip the clutch. Best for compact tractor owners curious about this specific prototype from Bomalite.
Tractor Time with Tim is an owner-operator hobby-farm channel where Tim develops and tests his own attachment ideas, and this video involves a product he personally designed and promoted through a specific vendor, so expect an enthusiastic, invested perspective rather than a neutral review.
He believed 24-inch grinders jump because each tooth bites more than it can handle, so a larger diameter with more teeth increases tip speed and bites per second without needing faster RPM.
No, Tim says not to use the clutch. The tractor's transmission, with its shuttle lever and brake pedal, makes the clutch unnecessary for this operation.
Watch the chip size. Huge chips indicate the grinder is doing a great job and working fast, while tiny chips mean it is not being very effective.
The Yanmar hydrostatic transmission allowed effortless creeper-like slow speed, so the operator could throttle up fully and let it creep through the stump.
