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PAG-Urea Grease for Electric Power Steering and Brake Actuators
Kyodo Yushi’s 2025 NLGI paper proposes a new PAG oil plus urea grease for EPS and electro-hydraulic brake mechanisms — plastic compatibility, low torque and rubber swell that mineral lithium cannot hit. CASE vehicles need this SKU even if…
Direct answer
Kyodo Yushi’s 2025 NLGI paper proposes a new PAG oil plus urea grease for EPS and electro-hydraulic brake mechanisms — plastic compatibility, low torque and rubber swell that mineral lithium cannot hit. CASE vehicles need this SKU even if the traction motor grease is a different polyurea/PAO.
- Kyodo Yushi’s 2025 NLGI paper proposes a new PAG oil plus urea grease for EPS and electro-hydraulic brake mechanisms — plastic compatibility, low torque and rubber swell that mineral lithium cannot hit.
- PAG urea greases proposed for EPS and brake actuators (Kyodo Yushi / NLGI) are a polymer + polyurea duty, not an EP2 chassis grease. Paint compatibility, noise and low-temperature torque dominate. Do not put a mineral CaSX in an EPS gearbox
- Name the test method on any number that reaches a TDS.
- Patents and papers are prior art, not a product Lubechem sells.
- Written for Automotive component suppliers and specialty grease plants.
Why EPS grease is not wheel-bearing grease
Why EPS grease is not wheel-bearing grease. Kyodo Yushi’s 2025 NLGI paper proposes a new PAG oil plus urea grease for EPS and electro-hydraulic brake mechanisms — plastic compatibility, low torque and rubber swell that mineral lithium cannot hit. CASE vehicles need this SKU even if the traction motor grease is a different polyurea/PAO.
PAG urea greases proposed for EPS and brake actuators (Kyodo Yushi / NLGI) are a polymer + polyurea duty, not an EP2 chassis grease. Paint compatibility, noise and low-temperature torque dominate. Do not put a mineral CaSX in an EPS gearbox because it is ‘premium’.
Literature/prior art for this note: NLGI Spokesman Q3 2025 — Nagasawa, Saito, Tsutsui, Kyodo Yushi, ‘New PAG Urea Grease Proposal’. Read it as evidence under its own method, not as a formula you can paste onto an Indian CoA.
The reader is Automotive component suppliers and specialty grease plants. Search phrases around “PAG urea grease EPS” should land on a decision: duty, method, purge, SKU sequence — then a link to the manufacturing page, not a second SOP.
PAG vs ester vs PAO for plastics and torque
PAG vs ester vs PAO for plastics and torque. Kyodo Yushi’s 2025 NLGI paper proposes a new PAG oil plus urea grease for EPS and electro-hydraulic brake mechanisms — plastic compatibility, low torque and rubber swell that mineral lithium cannot hit. CASE vehicles need this SKU even if the traction motor grease is a different polyurea/PAO.
PAG urea greases proposed for EPS and brake actuators (Kyodo Yushi / NLGI) are a polymer + polyurea duty, not an EP2 chassis grease. Paint compatibility, noise and low-temperature torque dominate. Do not put a mineral CaSX in an EPS gearbox because it is ‘premium’.
The reader is Automotive component suppliers and specialty grease plants. Search phrases around “PAG urea grease EPS” should land on a decision: duty, method, purge, SKU sequence — then a link to the manufacturing page, not a second SOP.
Urea thickener on PAG — process notes
Urea thickener on PAG — process notes. Kyodo Yushi’s 2025 NLGI paper proposes a new PAG oil plus urea grease for EPS and electro-hydraulic brake mechanisms — plastic compatibility, low torque and rubber swell that mineral lithium cannot hit. CASE vehicles need this SKU even if the traction motor grease is a different polyurea/PAO.
The reader is Automotive component suppliers and specialty grease plants. Search phrases around “PAG urea grease EPS” should land on a decision: duty, method, purge, SKU sequence — then a link to the manufacturing page, not a second SOP.
A realistic Indian specialty SKU
A realistic Indian specialty SKU. Kyodo Yushi’s 2025 NLGI paper proposes a new PAG oil plus urea grease for EPS and electro-hydraulic brake mechanisms — plastic compatibility, low torque and rubber swell that mineral lithium cannot hit. CASE vehicles need this SKU even if the traction motor grease is a different polyurea/PAO.
The reader is Automotive component suppliers and specialty grease plants. Search phrases around “PAG urea grease EPS” should land on a decision: duty, method, purge, SKU sequence — then a link to the manufacturing page, not a second SOP.
Lubechem will not invent a client list or a certificate. If the next step is a trial, send the duty brief. If the next step is legal clearance of a filing, that sits with a patent attorney.
What this page is for
OEM-adjacent, high-margin, almost no Indian content. Complements EV motor grease without cannibalising it. Images are labelled conceptual illustrations. Patents and papers are cited so you can go read them.
What the paper is evidence for — and what it is not
| Paper says | Useful to a plant | Over-read |
|---|---|---|
| A mechanism or ranking under stated conditions | Adds a test or a caution to the brief | Not a drop-in Indian SKU |
| NLGI Spokesman Q3 2025 — Nagasawa, Saito, Tsutsui, Kyodo Yushi, ‘New PAG Urea Grease Proposal’ | Read the method section before the conclusion | Do not market the DOI on a drum |
| Limited speed / load / oil | Match your duty or discard | Do not scale a ball-on-disc to a kiln girth gear |
| Additive name or treat | A screening idea | Treat rates in papers are not commercial packages |
People-first note: this is dated editorial for decision-making. It is not a scaled rewrite of the manufacturing pages, and it is not legal or certification advice.
Questions plants actually ask
Is PAG urea grease EPS a drop-in for whatever we run today?
Almost never. Thickener family, base-oil viscosity, NLGI grade and additive response all have to be matched to the duty. A purge plan comes before a plant-wide switch. Compatibility charts are screens, not guarantees.
Can we put PAG urea grease EPS on the TDS because a patent or paper mentioned it?
No. Patents are prior art. Papers are evidence under stated conditions. A TDS line has to be backed by a method you actually ran, on oil you actually stock, at a treat you can buy twice.
Who owns the formula if Lubechem develops it?
Ownership is the contract. The practice is independent formulation with IP transfer as scoped — not a branded additive package you can never leave. Ask for the assignment language before the first kettle.
What should Automotive component suppliers and specialty grease plants send in the first brief?
Duty (load, speed, water, temperature, relube), the current TDS and fail mode, target specs (IS / ASTM / OEM), and whether the product is sold, used in-house, or exported. Photographs of the failed component help more than adjectives.
Literature and prior art
Citations below are orientation, not a freedom-to-operate opinion. Lubechem does not copy claimed compositions and does not treat a patent as a product endorsement.
- NLGI Spokesman Q3 2025 — Nagasawa, Saito, Tsutsui, Kyodo Yushi, ‘New PAG Urea Grease Proposal’ — cited as prior art or literature, not as a product Lubechem sells
- EU REACH lithium-hydroxide classification trajectory — labelling and supply, not a ban on every lithium grease
- NLGI High-Temperature Performance Limit discussion — operating temperature is not drop point
- NSF H1 / ISO 21469 — incidental food contact, not a licence to invent ingredients