Del-Tron has introduced two differential micrometer heads that are among the world's smallest positioning devices. The model DF-1 head is only 1.656 inch long and 0.450 inches in diameter while the DF-2 head is 2.004 long and 0.450 inches in diameter. These positioning devices are ideally suited for use in precision laboratory instruments, optical devices and production machinery because of their ability to operate within tight confines with low levels of force that avoid the need for large motors and power supplies.
These two new devices can provide highly accurate positioning. Coarse adjustment is accomplished using a knurled ring operating a 40-pitch screw that moves the spindle 0.025 inch per revolution. Fine adjustment of 0.004 inch or 0.0002 inch per revolution is accomplished with an adjusting thimble located at the rear of the device. Total coarse movement is 1/4 inch for the DF-1 and 1/2 inch for the DF-2 while fine movement is 0.040 inch for the DF-1 and 0.020 inch for the DF-2. Both heads are available in two versions with one providing a 254 to 1 reduction and the other a 508 to 1 reduction.
The DF-1 and DF-2 differential micrometer heads are available separately for $135/$145 or as an option with the 99, R99, 450 and R450 series positioning stages. Standard mounting hole patterns are provided, allowing easy attachment of the devices that are being moved. The spindle has a hardened ball at its end to reduce friction and wear. The adjusting differential is accomplished by the use of internal rings threaded inside and out. The spindle is locked to the innermost ring, producing a gear reduction effect that translates gross movements at the thimble into fine movements at the spindle.
The new devices can easily be mounted to linear slides or stages or Del-Tron's model 99 and 450 series subminiature multiaxis positioners using a finely threaded barrel behind the moving positioning spindle. The 99 and 450 series positioning heads are ideally suited for providing precise intermittent movement and location of virtually any precision device. The combination of a DF-1 or DF-2 differential positioner and a 99 or 450 series subminiature stage provides an ideal solution for precise intermittent movement and location of virtually any precision device.
For more information, go to: www.deltron.com.