Lubricant composition for speed reducer and speed reducer

  • US 11,021,672 B2
  • Filed: 12/08/2016
  • Issued: 06/01/2021
  • Est. Priority Date: 12/25/2015
  • Status: Active Grant
First Claim
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1. A lubricant composition for an eccentrically oscillating speed reducer of planetary gear type, consisting of:

  • (a) a base oil which is a poly-alpha-olefin or a mixture of a poly-alpha-olefin and a mineral oil,(b) a hydrocarbon wax which is a polypropylene wax or a ethylene-propylene copolymer wax, each of said waxes having a weight-average molecular weight of 1,000 to 20,000,(c) at least one calcium salt selected from the group consisting of a calcium salt of petroleum sulfonic acid, a calcium salt of alkyl aromatic sulfonic acid, a calcium salt of oxidized wax, an overbasic calcium salt of petroleum sulfonic acid, an overbasic calcium salt of alkyl aromatic sulfonic acid, and an overbasic calcium salt of oxidized wax, and(d) an optional additive.

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