Imetra, Inc., Precision Components for the Instrument Industry - custom engineering, tools, measurement tools, carbide, ceramics, alloy, crystal, balls, bearing, carbide, ceramic, glass balls, instrument balls, ruby balls, ruby, sapphire balls, sapphire, tungsten carbide balls, tungsten carbide, zirconium oxide, zirconium oxide balls, glass beads, agate bearings, carbide bearings, agate, glass,  industrial jewels, jewels, jewel bearings, brass, bronze, copper, bushings, coils, magnets, magnetic, miniature coils,  miniature, toroidal, transducer, industrial diamonds, tungsten carbide dies, drills, microscopic drills, ferrules, gages, gearheads, gears, guides, ceramic guides, thread guides, textile guides, wire guides, hairsprings, diamond inserts, lenses, infrared lenses, magnets, alnico magnets, ceramic magnets, ferrite magnets, permanent magnets, rare earth, rare earth magnets, mortars & pestles, mortar, pestle, clock, switch, phonograph needles, carbide nozzles, sapphire nozzles, water blasting nozzles, optical flats, optical goods, fiber optics, infrared optics, atomizer orifices, gas orifices, recording instrument pens, pens, pivots, molded plastics, pointers, prisms, rods, rollers, rubies, screw machine, scribers, diamond scribers, heat shields, styli, styluses, substrates, burnishing, check valves, valves, ball type, spring loaded,  stop valves, vials, spirit level vials, winding, windows
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About Imetra
Product Lines
Industries Served
Contact Us
Imetra, Inc.
140A Metro Park
Suite 620
Rochester, NY 14623
Tel. (914) 592-2800
Fax: (914) 592-1637
[email protected]


  • Sapphire/Ruby
  • Ceramic/Zirconium Oxide Zirconia features the lowest coefficient of friction of all materials.

Types of bearings:

  • Ring Jewels
  • End Stones, or combination with Ring Jewel
  • V-Jewel
  • Cup Jewel
(click images for larger versions)

Jewel Bearing Assemblies:

Set in bushings per customer’s specifications.

Set in set screws per customer’s specifications.

Spring-loaded for shock absorbing feature.

Standard sizes available.

Bearing, Jewel-Bar HoleBearing, Jewel - Olive Hole, Loulle CupBearing, Jewel - Olive Hole, BombeBearing, Jewel - Olive Hole, RingstoneBearing, Jewel - Vee

(click images for larger versions)
Bearing, Jewel - CupBearing, Jewel - EndstoneBearing, Jewel - Olive Hole, Single CupBearing, Jewel - Bar Hole, Bombe'

Engineering assistance available for all applications, including matching pivots and/or shaft designs and lubrication.

Jewel bearings are our specialty. Please send us your application criteria. We will submit the proper and most economical solution to your bearing problem.

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