ISO 9001:2015 Certified · Nashik, India
Margo Rubber Products moulds compression sealing rubber for alloy-wheel leak-test rigs at its ISO 9001:2015 certified plant in Nashik, India — profiled to your rim diameter and bead-seat geometry, 12″ to 24″ and cut to print, for test pressures of 2 to 6 bar in NBR and EPDM.
Send a Rim Drawing02 · SPECIFICATION REFERENCE
Leak-test rubber is profiled to the rim diameter and bead-seat geometry of the wheel under test. Send the rim drawing and the test pressure with the enquiry, and tell us what the rig runs on — air, water, or a line where oil or release agent reaches the seal. That last answer is what decides the compound, not the wheel size.
| 12″–15″ | 2–4 bar | NBR or EPDM | Passenger car, steel and alloy |
|---|---|---|---|
| 16″–18″ | 2–5 bar | NBR or EPDM | Passenger car and crossover alloy |
| 19″–22″ | 3–6 bar | NBR or EPDM | SUV and premium alloy |
| 23″–24″ | 3–6 bar | NBR or EPDM | Large SUV and aftermarket alloy — cut to print |
| Commercial vehicle rims | Per drawing | EPDM or neoprene | Truck and bus wheels — cut to print |
| Non-standard geometry | Per drawing | Any of the eight | Pressure-decay and air-under-water rigs, castings and housings |
Showing 6 of 6 entries. How long a rig seal lasts is a question of compression set, not of a cycle count. A compression seal fails when it has taken enough permanent set that it no longer fills the bead seat — not after a counted number of closings. Compression set is measured to ASTM D395 and ISO 815-1, both of which we run in-house. Tell us the rig, the pressure and the duty and we will state the compression set of the compound we propose, so the replacement interval is yours to calculate rather than ours to promise. Values are typical for the rim band and are not a specification for a particular part; see our technical disclaimer.
03 · MATERIAL SELECTION
A rig seal is chosen for two things: what the rig runs on, and how well the compound recovers after being held compressed. Air and water rigs take EPDM; a line where oil, coolant or release agent reaches the seal takes nitrile. Name the medium and we will tell you which to specify.
Ethylene propylene diene rubber, and the default for a wheel leak-test rig. Excellent water, steam and ozone resistance, and it holds its recovery through repeated closings on an air or water line. Not for petroleum oils — if oil or release agent reaches the seal, specify nitrile instead.
Nitrile butadiene rubber, the general-purpose industry standard. Outstanding resistance to petroleum oils and hydraulic fluids — the compound for a rig on a machining or casting line where the wheel arrives with oil or release agent still on it.
Polychloroprene. Balanced across weather, ozone and moderate oil at once, which suits a rig that sits in an open bay or handles wheels from more than one line. Also the family we reach for when flame retardancy is specified.
Polyisoprene. The highest resilience of the eight — it recovers its profile faster between closings than anything else here, which matters on a fast-cycling rig. Not for oil, fuel or sustained heat.
Vinyl methyl silicone, the widest service range of the eight and very good compression-set recovery. Poor abrasion and tear resistance, though — on a seal that a rim edge drags across on every cycle it will not last, so specify it only where the rig is hot and the contact is clean.
Styrene butadiene rubber. Abrasion resistance at low cost, for water-only rigs where the seal is a high-turnover consumable and the priority is price per piece. Not for oil or fuel contact.
Ethylene acrylic elastomer. Our signature compound, supplied to Mahindra & Mahindra for engine and transmission applications. On a rig it is a specialist answer — a hot line where oil is present and neither EPDM nor nitrile holds.
Fluorocarbon rubber, the first choice for aggressive chemical environments. On a wheel rig it is rarely justified — it appears here because we mould it, and because a rig testing castings against a solvent occasionally needs it.
04 · COMMERCIAL TERMS
Margo produces in bulk against OEM schedules. Send the rim drawing, the test pressure and what the rig runs on, with your volume, and we will quote it. Repeat orders against an existing profile ship from the same tool, which is where the lead time drops — tell us the part reference and the annual volume and we will schedule against it.
Quotation
From the rim drawing
48 hrs
Prototype
One-off seal for rig trial
48–72 hrs
Repeat order, existing tool
Ex-works Nashik · scheduled against annual volume
2–3 weeks
New profile
Tooling lead time quoted per profile
3–4 weeks + tooling
Packaging
Bulk or interleaved on request
Poly bag + card label
05 · ENQUIRIES
Send the rim drawing and the test pressure, tell us what the rig runs on, and send the worn seal if you have one — it tells us more about the duty than a drawing does. Our engineering team responds within 48 hours with a recommended compound, its compression set, and a quotation.
