SFS ESPs cut the smoke and oil mist from gear cutting process

India’s largest manufacturer of cars recently selected Electrostatic Precipitators from SFS for filtering air from one of its most polluting manufacturing processes – gear cutting.

The air quality at gear cutting shop in the Manesar plant was observed to be deteriorating on a consistent basis, in spite of the pre-installed mist collectors that came with the machines. These pre-installed mist collectors were proving to be ineffective in filtering the heavy mist generated during the gear cutting process.

SFS successfully proved the filtration performance of its ESPs for the gear cutting process and was chosen to supply over 180+ systems, across various processes, for the entire plant.


The transmission line at client’s Manesar plant houses the heavy duty Japanese gear cutting machines (Mitsubishi, Kashifuji etc.) that cut the gears from forged blanks in under 2 minutes.

The high material removal rates in the cutting process create tremendous heat burning a part of the coolant oil, almost immediately, and some of it evaporates to form mist, soot and smoke.

The pre-installed mist collectors on the Japanese machines had a tendency to choke, which adversely affected the productivity, maintenance and filtration performance.


As the pre-installed mist filters choked frequently, all the heavy soot, smoke and mist generated in the process accumulated in the machining chamber. The workers were directly exposed to the smoke and mist upon opening the door putting their health and safety to risk.
Further, the environment too was heavily polluted with sticky, oily floors and machines. Valuable coolant oil, present in the mist, was being wasted as the mist was released into the environment.


Given the relatively high maintenance and consumable costs had to be paid for pre-installed mist collectors, client’s management was highly concerned about the filtration efficiency of ESPs and life-cycle costs such as consumables and maintenance.

Another challenge was with the plant layout which posed a strict constraint on placing the ESPs on the floor. Horizontal ESPs, from SFS, were put to test on the gear cutting machines which had the toughest and highest air contamination on the shop-floor. An extensive performance trial, conducted over a duration of one and a half months, were found to be highly successful in terms of delivering consistent and superior quality of air at the output. Further, the ESPs required hardly any maintenance, when the machines were in operation for all the three shifts.
The operators, shop-floor engineers and managers recommended SFS ESPs for delivering excellent filtration performance, throughout


  • The ESPs brought about a significant, measurable improvement in air quality on the shop-floor
  • The layout by SFS’s design team allowed all the ESPs to be placed above the machines by using specially designed stands, thereby saving space
  • Accommodated within existing layout
  • Zero disturbance to the operator and the process during installation as well as operations
  • Over 200 litres of valuable coolant oil was saved, annually, per machine


Subscribe Now