This revolutionary high speed vertical lift out-performs anything on the market today. What makes our lift superior? Three things; Reliability, Reliability, and Reliability. The 4 units in place at the test site have recorded a total of 6 years of operation with zero downtime for breakdowns and only annual maintenance. The exceptional reliability of our vertical lift translates into increased productivity and efficiency resulting in lower costs and higher profits.

Using a reciprocating central carriage system that rolls up and down a Sampson post, and powered by a closed-loop vector drive through a Textron gearbox, DDTI’s high speed vertical lift uses Aramid Fiber reinforced belts to lift product from the manufacturing floor to overhead conveyors or vice-versa. Mounted to the central carriage system is a motorized conveyor, which loads and off-loads the product. A buffer conveyor can stage products while the lift is in motion. Once the lift returns to the pick up point it performs a high-speed load and then transfers the cargo, discharges it, and begins another cycle. All this with half the footprint of a spiral.

Three cycles per minute is the standard design. Depending on belt and motor selection, and the length of stroke, cycle rates of 6 cycles per minute are attainable. Throughput is largely determined by the length of the carriage conveyor. For example, a 5 foot long carriage conveyor would transport 10 six inch boxes per cycle yielding 30 products per minute at the standard 3 cycles per minute rating.

Payload values are determined by belt strength and can be specified by the customer. The model 700 pictured has 2 each 37 mm wide belts rated at 2200 pounds each. We de-rate the payload to half for longevity and have the second belt for redundancy. Take away the weight of the carriage and conveyor and we are left with a payload rating of 700 pounds. Alternate belt widths and motor sizing provide payload ratings of up to 2000 pounds while still providing 3 transfer cycles per minute.

* Reciprocating central carriage system.
* Powered by closed loop vector drive motor.
* Textron high tolerance gearbox.
* Belts are aramid fiber reinforced.
* Lightweight aluminum carriage conveyor by Dorner.
* Three Cycles per minute standard.
* Throughput is determined by carriage conveyor length. Example: 5’ conveyor transports 10 boxes 6” wide.
* Load weight limits determined by belt strength. May be specified by customer.
* Can be configured as a ‘Z’ lift or as a ‘C’ lift. Customers’ choice.
* Small footprint.


The cost is in carriage drive, conveyor, and controls; therefore additional height adds less than you would think. Our system operates very smoothly, and is more precise in handling the product. It can be custom configured as a sorting conveyor, discharging partial or full loads at different levels of overhead conveyors, or in tandem as a lane crossover.

One of our customers now has 4 of our reciprocating lifts in operation. They have been our beta testing site for over 6 product years. Previously, they were using chain driven vertical lifts that required scheduled maintenance and lubrication each week. Break-downs were approximately one per lift per month. Our lifts have yet to be down for repair. Our lift requires monthly inspection and an annual change of gear-box lubricant. Belts should be replaced every five years, otherwise, just stand back and let it work.

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