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The Haybuster H-1135 Big Bite is a PTO tub grinder for processing hay, straw and crop residue in larger feeding and bedding operations. The rear-mounted hammermill uses forged swinging hammers, with twin belly augers carrying ground material to a hydraulic folding stacking conveyor.
An electronic governor adjusts tub feed to engine load. Remote controls operate tub direction and speed and conveyor height. The tub tilts for service access, and the eight-belt hammermill drive uses spring tensioning.
Grain grinding requires the optional hopper and suitable screens. Two screen halves must be selected with the machine; slug-buster and other feeding equipment can be specified for tough hay or crop residue.
| Specification | Details |
|---|---|
| Tub Diameter (flare) | 11 ft. 3 in. |
| Tub Depth / Base Diameter | 50″ / 8′11″ (1.27 m / 2.72 m) |
| Hammermill Length | 50″ with 88 forged ½″ hammers on 3½″ shaft |
| Feed Opening | 28″ × 52″ (71 × 132 cm) |
| PTO-Driven Belts | 8 × 5-VP belts, 1,000 RPM PTO, 21- or 20-spline shaft |
| Tub Rotation Control | Electronic governor; hydraulic valve with reverse |
| Conveyor Size & Lift | 24″ × 26′ cleated; stacks up to 18′6″ |
| Belly Augers | Dual 12″ × 4′6″, hydraulically driven |
| Tub Tilt | Full 90° hydraulic tilt |
| PTO Power Requirement | 200–315 PTO HP |
| Hydraulic Requirement | 8 GPM at 1,500 psi; two double-acting valves |
| Weight | 14,500 lb (6,577 kg) |
| Transport Dimensions (L×W×H) | 21′8″ × 11′4″ × 10′7″ (6.6 × 3.45 × 3.2 m) |
| Tub Loading Height | 9′2″ (2.79 m) |
| Tires & Hitch | 445/50R×22.5 super-single; clevis hitch |
| Electrical System | 12 V DC |
We can review the tractor's PTO shaft, hydraulic valves and available power alongside the material and finished grind. The governor manages feed during operation; clearing a blockage or servicing the grinder requires the shutdown and isolation procedures in the manual.
Tub Grinders · Haybuster equipment · Bale Processors · Compare Roto Grind and Haybuster tub grinders by material, finished grind, power, loading, and discharge
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After confirmation, you can arrange payment by check, ACH or wire transfer, or discuss financing. Financing may be available when at least $5,000 of qualifying equipment is financed, subject to credit and underwriting approval.
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Our Henderson, Iowa team includes dedicated parts and warranty staff. If you need a replacement part or help with a manufacturer warranty question, contact us with the model and serial number of your equipment.
Call 712-566-1033 or use the specialist button above. Meet our support team.

Family owned in Henderson, Iowa
“Excellent service before and after the sale, very knowledgeable about the products they offer.”
Family-owned since 1980
The Keast family's farming roots in Southwest Iowa reach back to the 1870s, when Thomas Keast settled near Macedonia. Russ began selling equipment on the family farm in 1980, bringing firsthand experience and a practical understanding of how machinery needs to perform in the field. Today, Keast Enterprises serves customers across the country, with the same dedication to fair prices, dependable support, and quality products.
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