I've just had a look at my saw (made by Clarke) and with a 50Hz 1,420rpm motor the three speeds given in the manual are 65, 95 & 165 ft/min. I checked the blade speed on the 65 ft/min setting with a Deumo mechanical tachometer and it's correct to within 1 ft/min.
Even with 3,800 rpm motor output this would only give 174, 254 & 441 ft/min. (By the way - 3,800 rpm doesn't sound right for an induction motor.)
Assuming your gearbox has the same ratio as everyone else's then I'm stumped.
As Stuart pointed out 1,110 ft/min might be OK for wood but for sawing even aluminium with a HSS blade it's many times too fast.
Phil,I have the Axminster swivel head version saw,on which the 560 watt motor runs at 1720 rpm at 50hz.
The blade speeds are given as 23, 34 & 54 m/min.
Regarding speed ranges of these type of motors,as you say, 3800 rpm does sound extremely high, even if the motor was of the 2 pole type(normally around the2700- 3000rpm mark)....OZ.