500 mm Rubber-Tired Grain Thrower Wheel (ZPT 1.6.3)

500 mm Rubber-Tired Grain Thrower Wheel (ZPT 1.6.3)

The ZPT 1.6.3 reverse rubber-tired wheel (500 mm diameter) is a driving and support running gear element of the ZP 01.220 rear axle (running gear), specifically engineered for modern self-propelled ZM-60U, ZM-90U grain throwers and OVS-25 grain cleaners.

Within the overall architecture of heavy agricultural machinery, this wheel performs two primary functions: acting as a reliable propulsion unit for navigating the threshing floor and serving as a primary dampening buffer. Thanks to its massive rubber layer, it absorbs harsh impacts and vibrations caused by ground unevenness, shielding drive half-axles, hubs, and the welded load-bearing frame of the machine from premature structural degradation.

Utilizing enlarged 500 mm ZPT 1.6.3 wheels on the rear axle (instead of standard 400 mm ZPT 1.6.2 wheels) addresses the increased load distribution on the machine's rear assembly. This section of the frame bears the static weight of the loading trimmer, self-propelled gearbox, and electric motors. Transitioning to an expanded diameter elevates the machine's ground clearance, enhances its tractive and grip performance on soft or uneven surfaces, and ensures smoother grain thrower mobility.

Technical Specifications of the ZPT 1.6.3 Rubber-Tired Wheel

• Catalog number: ZPT 1.6.3 (ZPT 1-6-3.000 SB) / base disk ZPT 1.6.3.1.
• Application: ZM-60U, ZM-90U grain throwers, grain loaders, OVS-25 grain cleaners. It is also utilized for modernizing and reinforcing the rear axle of classic ZM-60 and ZM-60A grain throwers.
• Outer diameter: 500 mm (contrasting with 400 mm for ZPT 1.6.2 front running wheels).
• Working surface width: 100 mm.
• Wheel disk material: St3 grade sheet structural steel, 6 mm thickness.
• Tire type: Solid bandless rubber tire.
• Hub mounting interface: Via 4 mounting holes on the ZM 01.180 hub square flange using M12x45 bolts.
• Quantity per rear axle bridge: 2 pcs. (left and right wheels).
• Country of manufacture: Ukraine.

Design Features and Engineering Advantages of the 500 mm Grain Thrower Wheel

During the design and serial production of ZPT 1.6.3 wheels, Zavod Moroza specialists accounted for the real and demanding operating conditions of machinery on open threshing floors and inside storage facilities:

1. Immunity to Punctures and Cuts

The wheel's working layer comprises a massive solid tire manufactured from a wear-resistant rubber compound. Because the wheel lacks an internal pneumatic air chamber, it remains impervious to punctures from nails, screws, metal wire remnants, or sharp stones frequently encountered on operating sites. The solid construction eliminates the risk of sudden operational halts due to flat tires, which is critically important during peak harvest seasons.

2. Durable Welded Disk Fabricated from 6 mm Steel

The core of the component consists of a thick-walled steel rim securely welded to a central sheet steel disk measuring 6 mm in thickness. The structure is engineered to withstand prolonged static loading under the heavy weight of the grain thrower. High-quality welds and metal thickness prevent crack formation, deformation, and radial runout ("figure-eights") during sharp machine turns on concrete or asphalt surfaces.

3. Precise Centering and Standard Bolt Pattern

Mounting and central bores on the steel disk are fabricated on CNC coordinate-boring machine tools, guaranteeing strict adherence to center-to-center distances for M12 bolts and ideal compatibility with the ZM 01.180 cam hub square flange. Proper coaxial centering eliminates rotational runout, protecting the hub cermet bushings and half-axle bearings from uneven wear.

4. Prevention of Tire Slippage During Maneuvering

A common issue during heavy machinery operation is the gradual creeping of the rubber mass off the steel rim under significant lateral forces during stationary pivots. At our plant, tires are press-fitted onto disks using specialized hydraulic presses with strict tension control. For high-load environments, we additionally offer a reinforced wheel version where the rubber coating is applied via hot vulcanization (lining)-in this case, the rubber bonds to the metal at a molecular level, completely eliminating slippage or delamination.

Recommendations for Installation, Compatibility, and Maintenance

To restore running gear integrity and preserve the service life of adjacent components, our plant's specialists recommend paying attention to several practical considerations.

When evaluating the feasibility of replacing the wheel as an assembly, note that while theoretically possible to replace solely the worn rubber tread, press-fitting a bandless tire onto a metal disk without an industrial hydraulic press in a standard workshop setting is virtually impossible. Impromptu tire stretching using pry bars or sledgehammers inevitably induces internal skewing, causing the wheel to wobble during transit and the tire to slip off during the grain thrower's first sharp turn. Consequently, replacing the wheel entirely as a pre-assembled factory unit represents the most rational, safe, and rapid solution for any agricultural enterprise.

Thorough inspection of mounting holes prior to installing a new wheel prevents frustrating future breakdowns. Evaluating the thread condition of bolts and the hub flange is essential; if fasteners remained loose for extended periods, holes on old disks may have elongated into ellipses, or the hub seating surface may be deformed. When installing a new wheel, we strongly recommend using exclusively high-quality new M12x45 bolts and spring washers (lock washers), tightening them evenly in a classic cross-pattern sequence to preclude the slightest misalignments.

The exceptional versatility of this upgrade renders the ZPT 1.6.3 wheel a fully interchangeable running element across generations of machinery. If you plan to transition your legacy asymmetric ZM-60 grain thrower from standard 400 mm wheels to a modern reinforced base, you can readily install our new 500 mm wheels onto standard rear hubs-both cam hubs (ZM 01.180) and blind hubs (ZM 01.104). Flange bolt patterns across all these parts are entirely identical, enabling fast and effective running gear modernization without complex workshop fabrication at the threshing floor.

Buying the ZPT 1.6.3 Rubber-Tired Wheel from Zavod Moroza

Zavod Moroza has manufactured original and upgraded spare parts for grain cleaning machinery with a full production cycle for over 20 years. Our metal structures are fabricated from high-grade rolled steel, undergoing precise machining and weld inspection.

We offer ZPT 1.6.3 running wheels in several convenient delivery configurations to fully satisfy your farm's requirements. In our classic factory execution, the wheel ships fully operational-featuring a solid rubber tire standardly press-fitted onto the steel rim, representing a reliable and optimal solution for most standard operating conditions. If your grain thrower operates under extreme regimes or frequently pivots on damaged concrete surfaces, custom orders can accommodate a reinforced hot-vulcanized wheel version, where the rubber working layer is securely bonded to the metal rim to ensure maximal wear resistance and completely eliminate delamination or slippage risks under heavy lateral loads. For those prioritizing every minute of operational time during peak harvest, the pre-assembled unit configuration represents the most rational choice. In this format, you receive a fully equipped running block where the new rubber-tired wheel is securely bolted to the proprietary ZM 01.180 cam hub featuring 25 mm cermet bushings professionally press-fitted on our factory test bench, complete with a latch-equipped half-clutch and all associated parts. Acquiring this assembled module enables rapid running gear restoration directly at the site-you simply slip the ready unit onto the axle and secure it.

Contact our technical specialists for consultation! We will help verify wheel compatibility with your axle, select necessary associated fasteners or shafts, and organize prompt dispatch so your machinery operates seamlessly and continues generating profit!