Around the world, Orthman screw conveyors are handling everything from alfalfa meal to zinc oxide

The productivity of your bulk material manufacturing operations ultimately depends on the speed and efficiency of your equipment supplies. That’s why so many companies rely on Orthman screw conveyors and components for a wide variety of applications, including distributing, collecting, mixing, heating and cooling, elevating, batching and aerating.

Because Orthman uses a standardized set of parts, screw conveyor systems are economical and easy to maintain and can be configured in a variety of ways to deal with process variants inclines and multiple discharge locations. Components can be enclosed for sanitary construction, and constructed for a variety of materials. Orthman screw conveyor systems and parts are readily available and supported by a responsive service network.

Orthman screw conveyors can be furnished with all necessary power transmission components, including V-belts, sheaves, motors and guards, all precision-designed to work with the screw conveyor drive.

Specialty screw conveyor components

18" diameter flared screw conveyors

  • Flared screw conveyor feeders are mounted under hoppers.
  • Pedestal mounted bearings
  • Foot-mounted drives with chains and sprockets
  • Oil bath chain guards

Conveyor screws

Conveyor screws are the component that moves material from the inlet to discharge. Conveyor screws can have many flight and pitch configurations, and can be fabricated from a variety of materials.

Download a copy of the Orthman Screw Conveyor Catalog [link to pdf] or the Orthman Screw Conveyor Installation Manual [link to pdf].


Orthman belt conveyors are built to handle tough conveying jobs with ease

Orthman belt conveyors are perfect for a wide range of applications because of their reliability, versatility and range of capacities. Materials from fine powders to large, lumpy stones can be handled in transport applications ranging from food processing to forestry, mining and quarrying, heavy production and agriculture.

Orthman offers a full range of different styles, designs and options of belt conveyor systems as well as years of experience in materials handling to meet your exact needs. And regardless of the application, you can count on the application engineering, system design and construction to be heavy-duty and design to provide years of trouble-free operation.

Download a copy of the Orthman Belt Conveyor catalog [link to pdf] or the Orthman Belt Conveyor Manual [link to pdf].

Belt conveyor options

Channel stringer belt conveyors

Belt conveyors designed with channel stringers are available in 10' and 20' standard sections. Depending on the required belt conveyor length, an additional custom length section will be supplied. A bolted splice plate connection joins and stiffens each joint. Belt conveyor channel stringer sections can be joined to truss sections by special lateral frames for spanning distances that require a truss section, while still enabling channel stringers to be used where the spanned distance does not require a truss. The channel frame belt conveyor design is especially suited to any application where overhead clearance is limited.

Truss frame conveyors

Truss frame belt conveyors are available in 24' deep and 42' deep sections. As with the channel frame belt conveyors, a custom-length section may be required to meet customers' required belt conveyor lengths. The truss frame belt conveyors are used in applications where a channel frame conveyor cannot span a distance unsupported.

Slider bed belt conveyors

Heavy, conservative design insures long life while also minimizing the number of intermediate supports needed for industries using light bulk material densities. Conveyors requiring moderate incline (23 degrees or less) may be supplied with special cleated belts.

U-trough belt conveyors

U-trough belt conveyors are used to provide better material containment on the carrying run. Minimizes fallback and increases efficiency in inclined applications when used with wood chips to provide more inter-meshing of material.

Flat slide belt conveyors

Flat slide belt conveyors are used when weighing the material is necessary, when the belt serves as a feeder, or when limited overhead clearance requires a flat slide design.

Totally enclosed belt conveyors

Sealed covers and drip pans allow for virtually dust-free material belt conveyance. Corrugated or non-corrugated covers are available. Drip pans are of 14 gauge steel, standard construction.

Custom engineered belt conveyors

If none of the standard belt conveyor designs fits your needs, Orthman will design a custom belt conveyor application for you. By supplying us with specifications and/or drawings illustrating the particular application, we will be able to produce general arrangement drawings for your approval.

Belt cleaners

Orthman offers several different styles of industrial and food-grade belt cleaners. The standard design is a spring-loaded belt cleaner with either a rubber or UHMW scraper blade. This type of cleaner is the most often used and will provide adequate cleaning in most applications. Motor-driven brush-type cleaners are also available for applications where the scraper-type cleaner does not remove enough material. Please consult with Orthman to determine the type of belt cleaner best suited for your application.

Flanged inlet load hoppers

Load hoppers are available for non-enclosed conveyors. A load hopper guides the incoming flow of material onto the belt and bolts to the top of the belt conveyor structure. If needed, impact idlers or a load section is located under the hopper's discharge point. The chute sides may be inclined or vertical to suit individual applications.

Standard belt conveyor covers

Orthman offers a variety of standard conveyor covers to protect the belt, material and idlers from the weather and other contaminants. Conveyor covers protect the belt from sun damage, in addition to protecting the idler rollers and belt from freezing.

Belt conveyor deck plates

Belt conveyor deck plates are used to prevent material from the carrying run of the belting from falling onto the return run of the belting. Typically, 16 gaauge material is used, although thicker material is available if needed. Inclined conveyor decking is designed to shed water and debris, while still protecting the belt and return idlers.

Drip pans

Essential for belt conveyors running in areas where delicate machinery or people may be underneath the conveyors, the fabricated drip pans are designed to keep any material on the carrying (if there are no deck plates) and return runs from falling below the conveyors. For totally enclosed belt conveyors, gaskets will be provided to ensure the drip pans are dust-proof.


Elevate bulk solids and flowing powders to new heights with an Orthman system

Orthman’s line of bucket elevators are designed to move flowing powders or bulk solids vertically with total reliability and precision. Orthman bucket elevators use an endless belt or chain with a series of specialized buckets or cups attached to it. From bulk material spread into an inlet hopper, the bucket elevator scoops it up and then lifts it up and over the head sprocket or pulley into a discharge throat.

Orthman industrial bucket elevators are made in a variety of shapes, weights and sizes, all utilizing centrifugal buckets or continuous buckets.

Centrifugal bucket elevators

Centrifugal bucket elevators are most commonly used to convey free-flowing, powdered bulk solids such as grains, animal feed, sand, minerals, sugar, aggregates, chemicals and more. They operate at high speeds and throw the materials from the buckets into discharge throats by centrifugal force.

Continuous bucket elevator

Continuous bucket elevators are used to handle brittle or fragile materials because they minimize product damage. They are also used to handle light, fluffy materials where aeration of the product must be avoided. Continuous bucket elevators have buckets spaced continuously and operate at slower speeds. The continuous bucket placement allows the force of gravity to discharge their load onto the inverted front of the proceeding bucket. The bucket then guides that material into the discharge throat on the descending side of the elevator.

Because every bucket application is unique, Orthman offers a broad series of industrial elevator designs. Selection of the proper type of bucket elevator depends largely on the capacity requirements and the characteristics of the material to be handled.


Regulates materials reliably and continuously

Depending on the bulk materials being handled, Orthman manual, electric or pneumatic discharge gates are used to regulate the flow on the conveyor, discharge materials at any given point in the conveyor and provide accurate cut-off for scale feeding operations.

The type of gate is dependent on the type of conveyor and the materials being conveyed. Gates are an important component of your conveyor system and should be considered from the initial design to provide reliable and accurate production.

Hydraulic Slide Gates

  • Regulate flow from material bins
  • Hydraulic cylinder features oversized rod and proximity switches
  • Self-contained power units with built-in reservoirs
  • AR-500 slide and liner in wear areas increases the durability and life of the gates
  • Completely assembled for bolt-on installation

Other conveyor products

  • Augers
  • Buckets
  • Collars
  • Couplings and coupling shafts
  • Covers
  • Drive shafts
  • End plates
  • Flighting
  • Gates
  • Hangers and hanger bearings
  • Inlet/ Discharge
  • Seals
  • Trough

Contact your Orthman Conveying dealer [link to Division>Conveying>Dealers] for the full range of products and components.