Oil Circulation Windows

For trouble-free visual inspection
Observation windows are used to provide a clear view of gears, lube level, couplings, chains or switches in sealed or oil immersed areas. Observation Windows can also be called oil windows, oil sight glasses or circulation windows.

  • One-step fixation, self-locking, no thread required, no machine wall reinforcement needed
  • Solid, shock-resistant transparent acrylic
  • Withstands temperatures up to 158° (70° C)
  • Absolutely oil tight, withstands internal pressures up to 8.8 psi (0,6 bar)
  • NBR seals
  • Extremely stable and fracture-resistant. No protective cage required
  • Can be mounted vertically or horizontally

Observation Window Dimensions

ImageNamePart NumberOverall DiameterPQ (min)RSThf:att:pa_overall-diameterhf:att:pa_p-dimensionhf:att:pa_q-minhf:att:pa_rhf:att:pa_s-dimensionhf:att:pa_t
Oil Circulation Window
Oil Circulation Window Model 24700247001-5/8", 41mm1-1/2", 38.1mm7/32", 5mm2-7/32", 21mm9/32", 7mm7/32", 5mm1-5-8 41mm1-1-2 38-1mm7-32 5mm2-7-32 21mm9-32 7mm7-32 5mm
Oil Circulation Window
Oil Circulation Window Model 477004770080mm75mm6mm30mm8.5mm5mm80mm75mm6mm30mm8-5mm5mm
Oil Circulation Window
Oil Circulation Window Model 48700487003-3/16"3"1/4"1-3/16"11/32"7/32"3-3-1631-41-3-1611-327-32