Four spindle*, air driven torque control tube expansion system with non adjustable tube pitch. Designed for all type of coolers that suit to the motor torque capacity. One air lever valve activates all motors and the whole expanding process goes automatically and independently on every motor.
* can be less or more spindle
Up to four** times performance
4 spindles working simultaneously
Working range covers tubes from 1/4” up to 1/2” (5/8”***)
Fixed tube pitch
Spindle with reverse compensation feature in case of not simultaneous return
Precise torque control tube rolling with automatic reverse
Commonality of parts with other K20 rolling motors
Available with other number of spindles – on request.
** depend number of working spindles
*** varies depending on tube material , gauge and tube sheet thickness
The L20 rolling motors is based on K20 rolling motors and the all parts are interchangeable.
Motors for Multipleexpand NAP-S4
Tube capacity* OD
* Tube capacity for most popular cases with a standard percentage of the wall reduction. The reached capacity can be different for thicker tube sheet, harder and exotic metal tube and a higher percentage of wall reduction.
Tool in Action
KRAIS Tube Expanders is a company with almost 40 years of experience in designing, manufacturing and delivering top quality tube tools.
KRAIS operates a Quality Management System which complies with the requirements of ISO 9001:2015. An electronic certificate can be authenticated here.