Part of a Timing Screw

parts of a timing screw

Standard  Infeed Timing Screws

Straight Root Design

straight root design

This infeed design has a constant root diameter. The thread height graduates from zero to the needed outside diameter, which is determined by container shape, size and machine limitations. A spring-loaded guide raid can be added to the infeed to aid random speeding. This screw design is used for round, oval and rectangular containers with sufficiently rounded edges to allow for effective separation.

Inverse Taper Design

inverse taper design

This is a design used for maximum performance when random feeding unstable or non-round containers. An offset guide rail is required to feed the container parallel to the timing screw root. For best performance, the initial guide rail should be spring-loaded.

Non-round Choke Design

non-round choke fed design

Used with the proper guide rail and fed at an angle, this type of infeed design will aid in separating rectangular or square containers while maximizing performance. A backlog of containers is required for effective operation.

Shingle Infeed Design

shingle infeed design

This design is characterized by a matched pair of timing screws that efficiently separates rectangular or flat-sided containers. This design easily handles large line backlog pressure and provides long timing screw life. Shingle infeed works effectively on all machines that are modified to accept it. It is most commonly used on labelers.

Special Function Timing Screws

Turning Timing Screws


Rotate containers 90, 180, or 360 to proper orientation for specific operations. Turning a container requires two timing screws.

Dividing Timing Screws


A matched pair of timing screws can be used to divide a single lane of containers into two or three lanes. This operation is usually accomplished in as little as 24 inches.

Combining Timing Screws

combining timing screw

Use proper phasing to combine containers with a wide variety of shapes.

Dwell Timing Screws


Dwelling timing screws combine the continuous feeding of containers with an intermittent operation, such as filling, capping or cottoning. The screw thread is machined to allow the container to stop its forward motion for up to on-half revolutions, although the screw continues to rotate.

Transfer Timing Screw

transfer timing screw

With a transfer timing screw, it will maintain control of containers as they move from one machine or operation to the next. Since transfer timing screws are never random fed, the same pocket configuration can handle a variety of containers.