Agriculture
When the harvest window is 3 days, seal failure is not an option.
Agricultural equipment operates in some of the harshest sealing environments on earth — abrasive soil, standing water, wide temperature swings, and machinery running 20-hour days during planting and harvest. Most ag seal failures trace back to contamination ingress rather than wear: a wheel hub that packs with mud, a gearbox that breathes in chaff, a hydraulic rod that drags field debris past a degraded wiper. The right exclusion seal stops the failure before it starts.
Our Products
ELASFOR Product Line — Agriculture Applications
| ELASFOR Product | Agriculture Application |
|---|---|
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Wheel hubs, final drives, axles — integrated multi-lip exclusion sealing in muddy and abrasive field conditions |
70×70
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PTO shafts, gearboxes, rotary drives — NBR for mineral oil service; FKM for biodiesel-blended fluids and high-temperature gearboxes |
70×70
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High-speed PTO shafts, chemical-resistant spray system shafts — spring-energized PTFE lip maintains contact force even after wear |
70×70
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Lift cylinders, steering rams, loader arms, 3-point hitch cylinders — rod seals, piston seals, wiper/scraper seals, U-cups |
70×70
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Auger shafts, conveyor drive shafts, seed meter drives — non-contact axial exclusion seal repels mud, chaff, and grain dust by centrifugal action |
70×70
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Hydraulic fittings, valve bodies, implement couplings — NBR standard; HNBR for high-temp hydraulic circuits; FKM for biodiesel or chemical sprayer lines |
70×70
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Manure and slurry pump piston cups in polyurethane — superior abrasion resistance and pressure rating over rubber compounds in high-solids service |
70×70
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Pivot pins, linkage joints, loader pivot arms — maintenance-free bushings tolerate shock loads and intermittent lubrication typical of field service |
70×70
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Heavy-duty final drives and track rollers on large tractors and combines — floating face seal design handles axial displacement from field shock loading |
Most agricultural OEM seal kits (John Deere, CNH Industrial, AGCO/Fendt, CLAAS) specify seal dimensions to DIN 3760 / DIN 3761 or ISO 6194. We cross-reference OEM part numbers to supply direct replacements across our full product range.
Applications
Common Sealing Applications
Wheel Hubs & Final Drive Axles
The highest-wear sealing point on tractors, combines, and planters. Cassette seals are the standard replacement for single-lip oil seals in field conditions — the pre-assembled, multi-barrier cartridge excludes mud, grit, and water without relying on housing bore surface finish for sealing performance.
NBR standard for mineral oil axle lubrication. FKM for synthetic gear oils or biodiesel-lubricated final drives. Floating mechanical face seals (gray iron or ductile iron lapped faces) on heavy final drives and track rollers where shock loading exceeds lip seal tolerance.
DIN 3760 / DIN 3761 · ISO 6194 · OEM cross-reference: John Deere, CNH, AGCO
PTO Shafts, Gearboxes & Rotary Drives
Power take-off shafts, bevel gearboxes, mower conditioner drives, header drives, and auger gearboxes. Double-lip oil seals are standard; the secondary dust lip is often the first to fail in chaff-heavy environments. PTFE spring-energized lip seals are specified on high-speed shafts where elastomer heat buildup shortens service life.
NBR for standard mineral gear oil service to 100°C. FKM mandatory for gearboxes running synthetic oils above 120°C or where biodiesel contamination of lubricant is possible. PTFE lip seals for shaft speeds above 6 m/s surface velocity where elastomer friction generates excessive heat.
DIN 3760 · ISO 6194
Hydraulic Cylinders & Steering Systems
Lift cylinders, 3-point hitch, loader arms, steering rams, implement actuators. Agricultural hydraulic systems operate at 200–350 bar with rods constantly exposed to soil and crop residue. Wiper/scraper seal selection is as critical as the rod seal — the wiper is the first line of defense.
Polyurethane rod seals for abrasion resistance and high-pressure rating (to 400 bar) in piston and rod service. NBR wiper seals for standard service; FKM where hydraulic fluid contains fire-resistant or biodegradable base stocks. PTFE-fabric lined rod seals for low-friction precision cylinders on planters and seeding equipment.
ISO 7986 · ISO 6020 · OEM specs: Parker, Bosch Rexroth, Danfoss
Manure & Slurry Pumps
Reciprocating piston pumps for liquid manure, slurry tankers, and biogas digestate transfer. The working fluid is highly abrasive, chemically aggressive (ammonia, organic acids), and loaded with fibrous and particulate solids. Polyurethane piston cups outperform rubber in this environment — higher abrasion resistance, better tear strength, and pressure ratings to 200 bar.
Polyurethane (Shore 90–95A) for piston cups — 5–8× the abrasion resistance of standard NBR in slurry service. FKM shaft seals where ammonia concentration is high (animal manure) — NBR degrades in sustained ammonia exposure above 50°C. HNBR as intermediate option where FKM cost is prohibitive and ammonia levels are moderate.
ISO 1629 material classification · OEM cross-reference: Vogelsang, Börger, Houle
Augers, Conveyors & Seed Meters
Grain augers, unloading conveyors, header drives, seed meter shafts, and fertilizer applicators. These low- to medium-speed rotating shafts run in dense clouds of abrasive grain dust and field debris. V-rings provide the most practical exclusion solution — they mount directly on the shaft, require no housing modification, and self-adjust to shaft runout.
NBR V-rings for standard grain and fertilizer dust service. FKM V-rings where fertilizer chemistry is aggressive (ammonium nitrate, MAP/DAP blends). PTFE lip seals on precision seed meter shafts where low friction is required to avoid torque variation affecting seeding rate consistency.
ISO 7425 · DIN 3760 · OEM cross-reference: HORSCH, John Deere C-Series, CNH Axial-Flow
Standards & Specifications
Governing Standards
| Standard | Scope | What It Covers for Seals |
|---|---|---|
| DIN 3760 / DIN 3761 | Rotary shaft lip seals — dimensions and tolerances | Shaft and bore dimensions, surface finish requirements, lip geometry; referenced by virtually all European agricultural OEMs (CLAAS, Fendt, Deutz-Fahr) |
| ISO 6194 | Rotary shaft lip-type seals — vocabulary and general requirements | Material performance requirements, temperature and pressure ratings, shaft surface finish (Ra ≤ 0.2–0.8 µm); international parallel to DIN 3760 |
| SAE J111 | Radial lip seals — terminology and definitions | Glossary of terms for radial lip seals; not a dimensional standard — for oil seal dimensions use DIN 3760 / DIN 3761 or ISO 6194; SAE J111 is referenced in some OEM documentation but does not define seal dimensions |
| ISO 10766 | Hydraulic fluid power — wear ring housing dimensions | Dimensional standard for wear ring (bearing ring) housing dimensions in hydraulic cylinders; defines guide groove geometry, not seal groove dimensions — use ISO 7425 for piston seal grooves and ISO 7986 for performance testing |
| ISO 6020 / ISO 6022 | Hydraulic cylinders — mounting dimensions | Tie-rod and flange cylinder standards; defines piston and rod seal groove geometries used in aftermarket and OEM cylinder seal kits |
| ISO 1629 | Rubber and latices — nomenclature | Standardized material designations (NBR, FKM, HNBR, EPDM, AU/EU polyurethane); used when specifying replacement compounds across OEM seal kits |
OEM note: Most agricultural seal failures during warranty are traced to incorrect replacement material rather than dimensional mismatch. Always verify compound (NBR vs. FKM vs. polyurethane) against the original OEM specification before substituting.
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