Assembled Grain Thrower Reverse Bearing Unit

Assembled Grain Thrower Reverse Bearing Unit

The ready-assembled bearing unit based on the H 026.058 cast-iron housing and the H 026.163 through cover is a universal, fully equipped support designed to ensure smooth and stable rotation of 30 mm working shafts. The unit ships in a calibrated factory assembly, freeing machine operators from the need to independently select compatible components, search for a matching bearing with a tapered adapter sleeve, and mount sealing lips. Each assembled block undergoes inspection for concentricity and tight mating surface alignment, making it immediately ready for installation on your machinery.

Composition of the Grain Thrower Reverse Bearing Kit

• Support unit designation - 30 mm cast-iron support kit assembled (housing + cover + bearing + oil seals + grease fitting).
• Bearing housing - H 026.058 (massive monolithic casting made of Sch 20 gray cast iron, equipped with two mounting feet for M10 bolted attachment).
• Bearing cover - through (pass-through) cover H 026.163 (Sch 20 gray cast iron, flanged type with two M8 bolt holes).
• Support bearing - double-row spherical ball bearing 11206 (compliant with international ISO standards - a set comprising the 1207K bearing with a tapered inner bore and the H207 clamping adapter sleeve complete with a nut and locking washer).
• Sealing elements - two reinforced rubber lip seals (30x52 mm oil seals / 1.2-30х52-1), installed on both sides of the bearing chamber.
• Lubrication device - threaded grease zerk fitting screwed into a specially prepared port on the bearing cover.

Where Is This Bearing Unit Located on a Grain Thrower?

Thanks to the ability of the 11206 spherical bearing to compensate for minor shaft deflections, vibrations, and installation misalignment of supports, this cast-iron support serves as a primary element for the highest-loaded working zones of grain cleaning machinery:

1. Running Gear - Reverse Gear (ZP 01.220)
   This is a critical, highly loaded section utilizing 4 such units simultaneously (two supports per left and right half-axle). In the running gear, the H 026.058 housings bear the full static mass of the machine's rear assembly and dynamic impacts during travel over uneven threshing floors. Because the unit operates close to the ground amidst continuous dust, it exclusively employs an open through-layout utilizing H 026.163 covers with dual-side oil seal protection.
2. Intermediate Shaft - Counter-Drive (ZP 04.000)
   Within the transmission system of classic grain thrower models (specifically ZM-60 and ZM-60A), the counter-drive designed to transmit and distribute torque from the electric motor acts effectively as an intermediate link absorbing heavy radial loads from drive belt and chain tension. The counter-drive shaft relies on 2 H 026.058 housings - however, our specific bearing unit featuring the H 026.163 through cover and oil seals resides on the shaft output side facing the drive pulley, while the opposite blind end of the shaft requires a kit equipped with the H 026.226 closed cover.

The Advantage of Ready-Made Bearing Housing Kits for Grain Throwers

Cast-iron H 026.058 housings and H 026.163 covers are manufactured by numerous foundry enterprises as standardized agricultural parts; however, in actual practice, parts originating from different batches or manufacturers often exhibit minor technological discrepancies:

• Manufacturers utilize their own unique pattern sets, chill molds, or templates for pouring liquid cast iron. Consequently, parts from various suppliers noticeably differ in external geometry - the thickness and curvature of the housing mounting "feet," the dimensions of clamping bolt bosses, or the fillet radii of the cover "ears."
• Even a minimal variance in Sch 20 cast-iron shrinkage during casting causes the center-to-center distance of the cover ears to mismatch the housing holes by fractions of a millimeter.
• Machining tolerances on mating planes between the housing and cover can also introduce gaps.

Attempting to assemble such a "mix-and-match" kit leaves the operator unable to properly torque bolts without skewing the bearing, or leaves the joint unsealed. Through gaps, lubricant quickly washes out while fine grain dust penetrates inside, accelerating wear on bearing raceways and balls. Therefore, purchasing a kit from a single manufacturer - specifically Zavod Moroza - is preferable. We manufacture H 026.058 housings and H 026.163 covers on our own high-precision machine tools, executing precise lapping and calibration of mating planes. Our assembled units feature guaranteed leak-tight joints, 100% component concentricity, and a calibrated installation clearance for unrestricted shaft rotation.

Note: The original text includes helpful maintenance guidelines emphasizing the use of high-viscosity greases like Litol-24, filling internal chambers to 1/3–1/2 capacity to prevent over-pressurization and oil seal blowouts.

Buying Assembled Grain Thrower Bearing Units from Zavod Moroza

In-house foundry production and a modern machine park enable Zavod Moroza to supply units of impeccable quality. Our ready-assembled bearing kits represent a rational solution that significantly simplifies grain thrower maintenance. Although overhauling running gear is a labor-intensive process, having a pre-assembled and adjusted support spares you from assembling and fitting the bearing block yourself. You do not need to source oil seals or fit covers on a workbench - you receive a verified factory unit fully prepared for shaft installation.

Contact our sales department - we will consult you regarding various inquiries specific to your case. If necessary, we can equip bearing units with blind covers for alternative applications or machinery, organizing prompt spare parts shipment without delay!