Power tools cover an increasingly diverse range of products, including angle grinders, circular saws, rotary hammers and impact wrenches, widely deployed in construction, home renovation, auto‑repair and many other scenarios. Though grease is an auxiliary material, it directly impacts tool efficiency, service life and user experience. For manufacturers, grease selection must take core performance criteria such as high‑temperature resistance, extreme‑pressure anti‑wear properties, water‑damp resistance and plastic compatibility, as well as compliance certifications, to match real‑world operating conditions.

I. High‑Temperature Resistance: Core Indicator for Tool Service Life and Stability

Power tools generate substantial heat during operation. Bevel gears in angle grinders run at high speed under relatively low loads, with a linear speed exceeding 20 m/s, generating high tooth‑surface temperatures. Cylinders in rotary hammers can exceed 100 °C during reciprocating air compression, which easily carbonizes base oil.

High‑temperature performance hinges on oxidation stability and high‑temperature rheology. Insufficient oxidation stability causes grease to degrade rapidly under heat; excessive grease thinning at high temperatures leads to leakage.

• FUCHS RHEOLUBE series uses PAO and ester‑type base oils for outstanding high‑temperature resistance.
• RENOLIT PU PTO 00 adopts polyurea thickener together with PAO base oil. Its oxidation induction time reaches 57 minutes (ASTM D5483), far exceeding competitors’ 24 minutes, demonstrating superior oxidation stability. Its dynamic viscosity at 100 °C hits 157 mPa·s versus competitors’ 125 mPa·s, balancing adequate lubrication and leakage prevention in high‑temperature service.

*For extreme‑temperature applications, UNIFLOR 8517 can withstand temperatures up to 225 °C.

II. Extreme‑Pressure & Anti‑Wear Performance: Critical Protection for Gears and Cylinders

Gears inside power tools endure harsh conditions: heavy loads, high‑speed rotation and frequent start‑stop cycles. High‑load tools such as circular saws place stringent demands on anti‑wear and extreme‑pressure performance. Common vibration and jolting also require good resistance to fretting wear and emergency‑lubrication capability.

FUCHS achieves greatly enhanced extreme‑pressure performance through the synergistic design of solid additives and optimized thickeners. RHEOLUBE 380 & 380 G1 deliver markedly superior load‑wear index, SRV load and weld load compared with conventional synthetic greases. For over two decades, they have been mainstream long‑term OEM selections for the power‑tool industry.

IV. Plastic Compatibility: Key to Preserving Structural‑Part and Insulation Performance

Power tools extensively use plastics and elastomers for housings, switches, connectors and other structural / insulating components. Grease‑plastic incompatibility may trigger material swelling, cracking or performance degradation, endangering tool safety and shortening service life.

FUCHS switch & connector greases are engineered for demanding temperature ranges and chemical exposure, ensuring compatibility with plastic materials.

• NYOGEL 760G: good compatibility with common connector materials.
• UNIFLOR 8517: compatible with a wide variety of plastics and elastomers.

For dry‑film lubrication, the GLEITMO‑series solid‑film lubricants suit surfaces of metals, plastics, elastomers, ceramics and glass. Excellent plastic compatibility enables FUCHS products to deliver lubrication without impairing tool structure or electrical performance.

V. Compliance Certifications: Value and Credentials of RoHS & REACH

Stricter global environmental regulations make compliance a hard threshold for procurement decisions. RoHS and REACH represent core requirements.

RoHS

RoHS restricts hazardous substances within electrical and electronic equipment. For power tools exported to the EU, non‑compliant grease will block whole‑market access. FUCHS products satisfy current RoHS regulatory requirements.

REACH

REACH governs the registration, evaluation, authorization and restriction of chemical substances. For example, substances recently added to ECHA SVHC candidate list such as TPP (Triphenyl phosphate) / TPPT (Triphenyl phosphorothioate) are either absent or kept below concentration limits in FUCHS formulations, complying with prevailing REACH rules.