supply of battery operated rail core drill , battery operated rail core drill along with additional 17 mm tct rail core drill, maximum core cutting capacity : 36 mm, rated speed: 250/450 rpm, battery type: li-on, battery voltage: 50 volt, battery pack capacity: 4 ah, number of battery supplied: 2 nos, number of charger supplied: 1 no, special design pressurized internal spindl e cooling to give maximum life of core cutter and to avoid heating of the rail. time taken to drill one hole of 32 mm i n 60 kg 90 uts rail section less than one minute. time taken to fix the machine on the rail, less than 2 minutes and t o de-clamp less than 1 minute. 34 number 32 mm diameter hole with full charge batteries (17 hole per battery) in 6 0 kg 90 uts rail section. 2 sets of ohe rail drilling adapters for gauge 60, 52 provided along with machine. weight of machine with battery: 18.5 kg; spec: tm/sm/468 dated 31.03.2014 first revision, 2017 [ warranty period: 12 mon ths after the date of delivery ] ]