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Agricultural machinery sealing · Delhi

Rotavator Oil Seals

A rotavator works in abrasive soil, and its gearbox and rotor shaft seals are what keep the lubricant inside and the grit outside. Ananta Venture manufactures rubber oil seals in Delhi for industrial, automotive, agricultural and heavy machinery applications — including replacement rotavator oil seals identified from your existing dimensions, markings or sample.

Discuss your seal requirement Call +91 9211305366
  • Oil seal & V belt manufacturer, Burari, Delhi
  • Replacement and bulk quantities
  • Specifications confirmed per application
Sealing points on a rotavator Schematic of a rotavator driveline showing the three oil seal positions: PTO input shaft, gearbox output to side drive, and rotor shaft end 1 2 3 1  PTO input seal 2  Gearbox output seal 3  Rotor shaft seal
Schematic of the driveline: the PTO input, the gearbox output feeding the side drive, and the rotor shaft end each need a seal suited to that position.
Product overview

Rotavator Oil Seals for Agricultural Machinery

Where the seals sit on a rotavator, what they actually do, and which parts of the assembly decide whether a seal performs or fails early.

What a rotavator oil seal is

A rotavator — a rotary tiller — is driven from the tractor power take-off through a central gearbox, then through a side drive to a horizontal rotor that carries the blades. Every one of those transfers happens on a rotating shaft passing through a housing, and at each of those points oil or grease has to stay inside the housing while soil, dust, crop residue and water are kept out. The component doing that job at the shaft exit is a rotary shaft lip seal, commonly called an oil seal.

In its usual form it is a moulded elastomer ring bonded to a metal case. The case is pressed into the housing bore; a flexible lip runs against the shaft; and a garter spring around the lip keeps it loaded against the shaft surface. A secondary dust lip may be added on the air side where contamination is heavy — which is exactly the condition a tiller works in.

What it does in service

Two jobs are done at once. The lip retains the gear oil or grease in the gearbox or bearing housing, so the lubricant level stays where it should and the bearings keep their oil film. The same lip, plus the dust lip where fitted, limits the entry of abrasive soil particles that would otherwise reach the bearing and the lubricant. The two duties pull in opposite directions: a lip pressed harder seals better against oil but wears faster and runs hotter.

A seal is therefore never a standalone part. It is one element in a system made up of the shaft (diameter, hardness, surface finish, runout), the housing bore (diameter, depth, concentricity), the lubricant (viscosity, additive package), the operating temperature, the shaft speed, and the working environment. Seal performance depends on the correct design and compound, correct installation, and the condition of the shaft and bore — not on the seal alone.

No oil seal can be described as leak-free under all conditions. A worn shaft, an out-of-round bore, a damaged lip during fitting or the wrong compound for the oil in use will each cause a leak that no amount of correct seal specification can prevent.

Section through a rotary shaft oil seal on a shaft: sealing lip, garter spring, outer case and dust lip Housing bore Shaft 1 2 3 4
Half-section of a lip seal: (1) sealing lip running on the shaft, (2) garter spring loading the lip, (3) outer case pressed into the housing bore, (4) dust lip on the contaminated side. Exact profiles vary by design and application.

This page is technical guidance, not a stock list. Rotavator models differ in gearbox layout, shaft sizes and seal profiles. Dimensions, material and availability are confirmed against your application before a rotavator oil seal is quoted.

Types and applications

Where Rotavator Oil Seals Are Used?

Four broad application groups cover most rotavator sealing work. They are described by location and duty rather than by part number, because the same position on two different machines can call for different seal designs.

  • Rotavator gearbox oil seals

    Fitted where the input shaft from the PTO enters the central gearbox and where the output shaft leaves it towards the side drive. These seals hold gear oil around the bevel or spur gear set and keep field dust out of the oil.

    • Duty: continuous rotation under load
    • Media: gear oil, sometimes grease in smaller units
    • Exposure: dust, mud, crop residue

  • Rotavator shaft and rotor oil seals

    Located at the rotor shaft ends, bearing housings and side drive or chain-case shafts. Here the seal is often the most exposed component on the machine and may need a dust lip or a more abrasion-tolerant compound.

    • Duty: high contamination, possible shaft deflection
    • Media: grease or oil depending on bearing arrangement
    • Exposure: direct soil contact and wash-down

  • Replacement seals for maintenance

    The most common requirement from workshops and spare-parts counters: one leaking seal, an old seal removed, and the replacement to be identified from its markings, its measured dimensions or the removed sample itself.

    • Typical buyer: repair workshop, dealer, fleet maintainer
    • Identification: markings, caliper dimensions, sample
    • Quantity: single pieces to workshop packs

  • Application-specific sealing arrangements

    Where a standard single-lip seal does not last — heavy slurry, repeated wash-down, high temperature near a brake or clutch, or a non-standard bore — the arrangement may need a different profile, a dual-lip design or a different elastomer.

    • Requires: duty details, not just dimensions
    • Confirm: profile, compound, lip arrangement
    • Availability: confirmed per requirement

Rotavator gearbox oil seals and rotavator shaft oil seals are not interchangeable even when their nominal dimensions match: housing depth, lip orientation, dust protection and the lubricant in use can all differ. Equipment brand and model details are only referenced when they come from the customer's own documentation, since compatibility cannot be assumed from appearance.

Materials and construction

Choosing the Right Compound for the Duty

The elastomer decides how a seal behaves against oil, heat, abrasion and weather. These are general properties of the common seal compounds, not a promise that every compound is held for every size.

Nitrile rubber NBR

The default choice for most agricultural gearbox and shaft seals. Nitrile has good resistance to mineral oils, greases and hydraulic fluids, useful mechanical strength and abrasion resistance, and a cost that suits high-volume replacement work.

Suits
Gear oil and grease sealing at normal machinery temperatures; dusty, abrasive field duty.
Limits
Poor resistance to ozone, sunlight and many synthetic fluids; heat resistance is moderate compared with FKM.
Check
Actual oil type, sustained housing temperature near the seal, and exposure to sun or chemical wash.

Fluoroelastomer FKM

Specified where the seal runs hotter than nitrile can tolerate, or where the lubricant or environment is chemically aggressive. FKM holds its properties at higher continuous temperatures and resists a wider range of oils, fuels and solvents.

Suits
Hot gearboxes, seals near exhaust or brake heat, some synthetic lubricants.
Limits
Higher cost; low-temperature flexibility is poorer than NBR; not suitable for every fluid, and some oils and additives still attack it.
Check
Real peak temperature at the lip, oil specification, and whether low-temperature start-up matters.

Silicone rubber VMQ

Used mainly for very low or very high temperature extremes where oil resistance is secondary. Silicone stays flexible in cold conditions, but it has lower tear and abrasion resistance than nitrile and only moderate resistance to oils.

Suits
Static or low-speed sealing at temperature extremes; some speciality applications.
Limits
Poor resistance to abrasion and to many hydrocarbon oils; not a general replacement for NBR in a soil-exposed rotavator position.
Check
Whether the application is genuinely temperature-driven, and whether the lip sees abrasive dirt.

EPDM EPDM

Chosen for water, steam, brake fluid and weather resistance rather than for oil. EPDM handles outdoor exposure and hot water well, but swells badly in mineral oil and grease, which rules it out of most gearbox positions.

Suits
Water-side sealing, wash-down equipment, weather-exposed covers.
Limits
Not compatible with mineral oil or grease — a critical check before use anywhere on a gearbox.
Check
The actual fluid in contact with the lip, not just the surrounding environment.

No single compound is best for every rotavator seal. Material is selected from the lubricant, the temperature at the lip, shaft speed, contamination and expected service life. The temperature figures quoted by compound suppliers are material limits under test conditions — they are not a guarantee for a finished seal in a specific machine. Confirm the compound against the equipment manufacturer's specification where one exists, and tell us the oil and duty so the selection can be checked rather than assumed.

Construction details that change performance

  • Case typeMetal-cased or rubber-covered OD; the bore material and finish decide which grips and seals better.
  • Lip arrangementSingle lip, or main lip with an additional dust lip on the contaminated side.
  • Spring loadingA garter spring maintains lip pressure as the rubber takes a set; spring material matters in wet duty.
  • ProfileStandard, stepped or flanged profiles suit different bore depths and retaining arrangements.
Dimensions

Rotavator Oil Seal Sizes and Specifications

Three measurements identify most oil seals. Getting them right, and reading them the way a seal supplier reads them, is what prevents a wrong part arriving at the workshop.

The standard dimension convention

Oil seal dimensions are written as inner diameter × outer diameter × width — ID × OD × W, also described as shaft diameter × housing bore × seal width. A seal marked 35 × 50 × 8 is intended for a 35 mm shaft, a 50 mm bore and an 8 mm housing depth. Those figures describe the space the seal occupies, not the size of the machine it fits.

Measure with a vernier caliper on the seal itself where possible, and on the shaft and bore where the old seal is destroyed. The shaft measurement is taken on the unworn band of the shaft, not in the groove left by the old lip — a worn groove can read undersize and lead to a seal that is too tight. Bore measurement should be taken at the seal seat, and housing depth checked separately from bore diameter.

What to record before ordering

  • Shaft diameterMeasured at the sealing position, with wear and runout noted.
  • Housing boreMeasured at the seat, plus the available depth for the seal case.
  • Seal widthThe case height the bore will accept, not the old seal's crushed height.
  • ProfileStandard, flanged or stepped; single lip or lip plus dust lip; cased or rubber-covered OD.
  • MarkingsAny numbers or letters moulded into the old seal, photographed before it is discarded.
  • Duty detailsLubricant type, approximate shaft speed and operating temperature.
  • ApplicationMachine make and model, and the exact position — PTO input, gearbox output, rotor end or side drive.
How oil seal dimensions are read: inner diameter against the shaft, outer diameter against the housing bore, and width across the case ID — shaft OD — bore W — width Section view
How the three dimensions are read: ID against the shaft, OD against the housing bore, and W across the case. The figures themselves are never assumed — they are measured.
ID Inner diameter Matches the shaft. Nominal ID is slightly smaller than the shaft so the lip fits with interference.
OD Outer diameter Matches the housing bore. Interference in the bore is what stops oil passing around the outside of the case.
W Width The case height that the bore and retaining arrangement will accept.

No size chart is published here on purpose. A rotavator oil seal size list that is copied between machines, or padded with illustrative numbers, does more harm than good: it invites ordering a part that does not fit. Where a machine is known, its parts documentation is the reliable source. Where it is not, the four measurements above are.

Buyer specification checklist

Rotavator Oil Seal Specification Sheet

Use this as an enquiry checklist. Every row is a detail to confirm with the application — not a standard specification held in stock.

Buyer specification checklist — rotavator oil seals. Complete what you can; the remaining items can be settled with the seal supplier or the equipment documentation.
Specification Details to confirm
Product category Rotavator oil seals — rotary shaft lip seals for agricultural machinery
Application Gearbox input or output shaft, rotor shaft end, side drive or bearing housing; state the exact position
Seal type Confirm the required profile and design: single lip or lip with dust lip, cased or rubber-covered OD, flanged or plain
Dimensions ID × OD × width in millimetres, measured or taken from the old seal's markings
Material Confirm the compound from the lubricant, temperature and contamination — NBR is common, FKM where heat demands it
Shaft condition Surface finish, hardness and wear at the lip line; a grooved shaft needs attention before a new seal is fitted
Shaft speed Operating speed at the sealed shaft, from the equipment data or measured under working conditions
Temperature range Normal and peak temperature at the seal position, compared against the selected compound's limits
Lubricant compatibility The oil or grease actually in use, including grade and any additive package that affects elastomer swell
Contamination Soil, dust, water, slurry or wash-down exposure; decides whether a dust lip or different compound is needed
Part reference Existing seal markings or the equipment manufacturer's part number, where available
Quantity Single replacement piece, workshop pack or bulk requirement — subject to supplier confirmation

Scroll the table sideways to see all columns.

Selection

Key Rotavator Oil Seal Selection Considerations

Dimensions get a seal into the housing. These twelve factors decide whether it lasts there.

  • Equipment model and application

    The same nominal size can serve different duties on different machines. Start with the machine and the position, then the dimensions.

  • Gearbox or shaft location

    Input, output, rotor end and side drive see different speeds, oil levels and contamination loads.

  • Accurate dimensions

    Measure the seat, not the worn shaft groove. Check bore depth as well as bore diameter.

  • Rotational speed

    Lip surface speed sets the heat generated at the contact line and narrows the usable compound and profile choices.

  • Lubricant compatibility

    Seal swell, hardening or softening depends on the oil base stock and additives, not on the oil's name alone.

  • Operating temperature

    Use the temperature at the seal, including heat soak after work stops, rather than ambient air temperature.

  • Dust, soil and water

    Rotavator seals live in abrasive conditions. A dust lip and an abrasion-resistant compound are often justified.

  • Seal lip design

    Single lip retains lubricant; a secondary lip protects the primary one where contamination is severe.

  • Installation conditions

    Bore condition, chamfer, access for a proper driver, and whether the shaft can be supported during fitting.

  • Replacement part identification

    Markings, sample and equipment documentation together give the most reliable identification.

  • Shaft and bore condition

    A wear groove under the old lip, a scored bore or a damaged chamfer will shorten the life of even a correctly specified seal.

  • Expected service life

    Frequent replacement intervals justify a more durable compound or a dust lip; a short remaining season may not.

Commercial

What Affects Rotavator Oil Seal Price?

Rotavator oil seal price is quoted against a confirmed specification and quantity. These are the factors that move it.

Two seals with the same appearance can differ in price by a wide margin, because the cost is driven by what the part has to survive rather than by its size. A small seal in a high-temperature compound can cost more than a much larger seal in standard nitrile.

  • Dimensions and profileUnusual bore sizes, flanged or stepped profiles and thin sections need different tooling and handling.
  • Material and compoundFKM and speciality elastomers cost more than standard NBR; compound selection follows duty, not preference.
  • Seal constructionA dust lip, a second lip, a specific case finish or a particular spring material each add operations to the part.
  • Application requirementsHigher temperature or speed duty may require a more expensive compound to achieve acceptable life.
  • Order quantityUnit price usually falls as quantity rises, because setup and handling are spread across more pieces.
  • CustomisationNon-standard sizes or special markings are quoted separately and only where the requirement justifies them.
  • Packaging and deliveryWorkshop packs, bulk cartons, labelling and dispatch destination all affect the landed cost.
  • Taxes and commercial termsApplicable taxes, freight and payment terms are stated in the quotation rather than assumed.

No price is published on this page. A figure without dimensions, compound and quantity would be a guess, and a guess is worse than a quotation. Send the specification and required quantity and you will receive a quotation built on the actual part.

Before you ask for a price

Have these ready and the quotation can be specific:

  • ID × OD × width, or the old seal
  • Machine make, model and seal position
  • Oil or grease in use
  • Quantity required
  • Any marking or part number from the old seal
Manufacturer and supplier

Rotavator Oil Seal Manufacturer and Supplier in India

Ananta Venture is a Delhi-based manufacturer of rubber oil seals and V belts, supplying industrial, automotive, agricultural and heavy machinery applications.

Buyers of rotavator oil seals usually arrive from one of four directions: an equipment manufacturer specifying a seal for a new machine, a distributor building a spare-parts range, a workshop that needs a single replacement quickly, or a wholesale purchaser sourcing repeat quantities. Each needs the same core information, and each values a different part of the answer.

For agricultural equipment manufacturers

Seal requirements are best discussed at drawing stage, with the shaft and bore dimensions, the lubricant, the expected duty cycle and the assembly method. Where a design is still open, seal selection can be considered alongside the housing and shaft specification rather than after it.

For distributors, dealers and workshops

Replacement identification is the practical bottleneck. A clear photograph of the old seal's markings, caliper readings of ID, OD and width, and the machine model are usually enough to identify a candidate. Where markings are gone, the removed seal itself is the best reference.

For wholesale and repeat buyers

Repeat orders are quoted against the specification already agreed, with quantity, packing and dispatch terms stated in writing. Where a range of sizes is needed, listing them together with annual or quarterly volumes gives a more useful commercial picture than a single-size enquiry.

Practical value

Why Correct Seal Selection Matters on a Rotavator?

A seal is a low-cost part in a high-cost assembly. Getting it right protects the gearbox; getting it wrong tends to surface as a leak, a failed bearing or a seized shaft.

  • Retains gearbox lubricant

    A correct lip and compound hold oil at the shaft exit, so the lubricant level and the bearing oil film stay as designed.

  • Limits contaminant ingress

    A dust lip and a suitable compound reduce the soil and water reaching the bearing cavity — the main cause of premature agricultural bearing failure.

  • Supports sealing performance

    Correct interference, lip pressure and bore fit let the seal work as intended instead of compensating for a mismatched part.

  • Reduces avoidable maintenance

    Fewer repeat strip-downs for the same shaft position, and less risk of a leak being cured by a seal of the wrong type.

These are expectations from correct specification and installation, not guarantees. Seal life also depends on shaft condition, bore condition, lubricant cleanliness and how the machine is operated.

Ordering process

How to Order Rotavator Oil Seals?

Four steps from a leaking machine to a confirmed seal specification.

  1. 01

    Identify the location

    Machine make and model, gearbox or shaft position, and the reason for replacement — leak, rebuild or routine service.

  2. 02

    Share the dimensions

    ID, OD and width, or the old seal's markings, or a clear photograph and the removed sample where possible.

  3. 03

    Confirm the duty

    Lubricant, temperature, speed and contamination, so the compound, profile and lip arrangement can be checked.

  4. 04

    Request a quotation

    Quantity, packing and delivery details, then a written quotation against the confirmed specification.

Send your seal details +91 9211305366
Frequently asked questions

Rotavator Oil Seals: Common Questions

Practical answers on identification, materials, pricing and supply.

What are rotavator oil seals used for?

They seal the points where rotating shafts leave a rotavator gearbox, side drive or rotor bearing housing. At each of those points the seal retains gear oil or grease inside the housing and limits soil, dust and water entering from outside. Without a functioning seal, lubricant escapes and abrasive contamination reaches the bearings.

What is the difference between a rotavator gearbox oil seal and a shaft oil seal?

The difference is position and duty rather than a fundamentally different component. A gearbox oil seal sits at the gearbox input or output shaft, sealing gear oil and often running at higher speed and temperature. A rotor or side drive shaft seal sits further along the drive line, closer to the soil, and usually faces heavier contamination and more shaft deflection.

Because of that, the two positions can need different profiles, lip arrangements and compounds even where the nominal dimensions look similar. Always identify the position as well as the size.

How do I identify the correct rotavator oil seal size?

Read the markings on the old seal first — they normally give inner diameter, outer diameter and width, sometimes with a profile code. If the markings are unreadable, measure the seal with a caliper, or measure the shaft at its unworn band and the housing bore at the seal seat.

Check the housing depth as well: a seal of the right diameter but the wrong width will not seat correctly. Where the machine's parts documentation is available, it is the most reliable reference of all.

What dimensions are needed to order a replacement rotavator oil seal?

The essential three are inner diameter, outer diameter and width — written as ID × OD × W in millimetres. Useful additions are the profile type (single lip, lip with dust lip, flanged or plain), the case type, and any marking or part number from the old seal. A photograph of the removed seal helps confirm the profile.

Which material is suitable for a rotavator oil seal?

Nitrile rubber (NBR) is the usual choice for agricultural gearbox and shaft seals because it handles mineral oils and greases well, resists abrasion and suits replacement volumes. Where the seal runs hot, or the lubricant is chemically aggressive, fluoroelastomer (FKM) may be specified instead.

Silicone and EPDM are chosen for temperature extremes, water or weather resistance rather than for oil resistance — EPDM in particular swells in mineral oil and is unsuitable for most gearbox positions. The right compound follows the lubricant, temperature, speed and contamination of the specific application.

What factors affect rotavator oil seal price?

Dimensions and profile, the elastomer compound, construction details such as an additional dust lip, the duty the seal must survive, order quantity, any customisation, packaging and delivery requirements, and applicable taxes and commercial terms.

A quotation is prepared against confirmed specifications and quantity. Published price figures are deliberately avoided here because a price without the dimensions and compound would not reflect the part actually required.

Can I purchase rotavator oil seals in wholesale quantities?

Bulk and repeat requirements are quoted against the confirmed specification, with quantity, packing and delivery terms stated in writing. For a mixed range, list the sizes and the expected volumes together — it is easier to quote and easier for you to compare. Actual stock and minimum quantities are confirmed at the time of enquiry.

How can I identify a replacement oil seal if the original markings are missing?

Use the removed seal itself and the machine. Measure the seal's ID, OD and width with a caliper; note the profile and whether it has a dust lip; measure the shaft and bore if the seal is too damaged to read. Then match against the machine's parts documentation, or send the dimensions and a photograph to the supplier.

Check the shaft for a wear groove where the old lip ran. Fitting a new seal onto a grooved shaft often shortens its life, and the shaft may need attention first.

What information should I provide when requesting a quotation?

Send as much of the following as you have:

  • Dimensions (ID × OD × width) or the old seal's markings
  • Machine make, model and the exact seal position
  • Oil or grease type and grade in use
  • Operating temperature and approximate shaft speed, if known
  • Contamination conditions — soil, slurry, wash-down
  • Required quantity and delivery location
How do I determine whether an oil seal is compatible with my rotavator gearbox?

Compatibility has three parts: dimensional fit (shaft, bore and width), material compatibility with the lubricant and temperature, and design suitability for the duty. The equipment manufacturer's specification settles the first two where it is available. Where it is not, confirm the lubricant, measure the seat and share the details with the seal supplier before ordering.

Physical resemblance is not proof of compatibility — two seals of the same size can differ in compound, lip design and spring, and behave very differently in service.

Answers describe general sealing practice. They are not a substitute for the equipment manufacturer's specification or for inspection of the actual machine.

Next step

Identify the seal before you replace it

A rotavator oil seal is a small part with a specific job. Send the dimensions, the machine detail and the lubricant in use, and the specification can be checked against your application rather than guessed from appearance.

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