1926, ROTOR became a patent in Switzerland for the first Live-Centre worldwide. Characteristics were adjustable needle bearings and a disc spring which protects thrust ball bearings from over pressure.

1927, Family Scherler bought the patent of ROTOR and founded a company which produced and sold the first ROTOR Live-Centres.

Already in the first years of existence new business-partner in England, France and Austria could be found.

1941, Hans Scherler launched an identical Live-Centre product called Favor, after the patent of ROTOR was expired.

ROTOR became a name in Northern America when a European Family in Canada was very successful in selling Live-Centres. In the sixties the share of market was around 50%. Until today KAR Ltd. is one of the most important ROTOR customers.

ROTOR is the no. 1 in Switzerland for Live-Centres. ROTOR became a technical term in the Live-Centre business.

1982, after Mrs. Scherler’s death, a company called Holzegger AG (Rapperswil) bought the rights on ROTOR. Thanks to very good partners in Switzerland and abroad, ROTOR grew continuously.

1992, Roider Präzisionsmechanik bought the whole ROTOR range as a good introduced product.

1993, new lines could be launched on the occasion of the EMO in Hannover. Eco-Line Centres and Driving-Centres extended the range.

1995 Monika and Daniel Roider founded the new ROTOR TOOL GmbH. All ROTOR activities were settled by this company from that point.

ROTOR became first supplier of several machine manufacturers. Super Accurate Centres (accuracy guaranteed to max. 0.002 mm) helps to meet high demands in hard turning and grinding.

1997, ISO 9001 Certification

ROTOR Main-Line Centres became a new design. Maintenance-free norm bearings were used instead of adjustable needle bearings with the models MT 1 ST to MT 6 ST. The new, modern design comes up with nowadays demands of high quality and reliability.

1999, a new and bigger plant in Oetwil am See could be bought.

2001, on the occasion of the EMO in Hannover, ROTOR introduced new products:

• Main-Line Type K, Centres with internal cones for interchangeable inserts
• Main-Line Type L, slim, extended point Centres
• HP-Line, super accurate Centres for grinding and hard-turning

2007, takeover of Graber Uetikon. A well known company of Chuck manufacturing. Graber Chuck and PML-jaws will be produced from ROTOR from March 2007.