Tony M Sep 18, 2020:

@ Asker What Althea has found is exactly what I would have imagined from the term: a shallow hollow to allow something to locate in it; a small indentation

Bridget Jean (asker) Sep 18, 2020:

Merci pour vos précieuses précisions Althéa :)

Althea Draper Sep 18, 2020:

I'm glad it has helped. The dimple is a little 2mm deep cone shape that's either machined out of the surface or was cast that way. If you take a sectional cut through its centre, it makes a triangle that has a 120° angle at the point at the bottom. The diagram isn't the best!

Bridget Jean (asker) Sep 18, 2020:

@Althea J'en reviens pas !
C'est à quelque chose près ce sur quoi je travaille!
Pour ce client (mais l'agence ne m'a pas donné de schéma) et ils ont juste fait quelques modifications dans cette page parce que j'y ai retrouvé pratiquement tout le texte…
Ceci dit, je ne vois pas les "dimples" sur le schéma lol
Je vais donc conserver la suggestion de Cyril :)
Bien joué en tous cas ! Merci beaucoup Althea

Althea Draper Sep 18, 2020:

http://pmo5e085f.pic23.websiteonline.cn/upload/api_610_10th_...

According to this API document about, "Centrifugal Pumps for Petroleum, Petrochemical and Natural Gas Industries", page 49 states

"All bearing housings shall be dimpled at the locations shown on Figures 27 and 28 to facilitate consistent vibration measurements. The dimples shall be suitable for accurate location of a hand-held vibration transducer with an extension “wand”. Dimples shall be either cast or machined and shall be nominally 2 mm (0,080 in) deep with an included angle of 120°."

Pages 40 and 41 have diagrams of the dimples and also for the optional arrangement for mounting vibration-measuring equipment

Althea Draper Sep 18, 2020:

@Cyril I think I have found a possible drawing. Have a look at the drawing of the bearing housing on page 5 in https://issuu.com/maquinasytecnologia/docs/ohh_ohhl_en_e0069...