Positioning Ring & Shaft

Positioning Ring & Shaft for Pet Bottle Capping Equipment

In many capping systems, the positioning ring and positioning shaft are two components that rarely draw attention, yet the whole capping head relies on them to stay aligned.

Our ring (Ø67 × 19 mm) and shaft (Ø49 × 61.2 mm) are produced from high-quality stainless steel and are built for long-running PET bottling lines where stability matters more than anything else.

These parts don’t add complexity to the machine, but they keep the capping head from drifting during operation. When the head stays centered, the cap seats correctly and the tightening step becomes far more consistent.

Material

We use a stainless-steel grade commonly chosen for liquid-packaging equipment. It holds its shape well, even after months of repeated contact and vibration. The surface is treated to resist wear and cleaning agents, which is important for lines that sanitize equipment frequently.

Dimensions

Ring: Ø67 mm × 19 mm

Shaft: Ø49 mm × 61.2 mm

Each part is individually machined and checked to ensure that it fits the capping assembly without the need for adjustment or shimming.

How These Parts Function in the Machine

During the up-and-down movement of the capping head, the shaft keeps the motion straight, while the ring controls the horizontal position of the cap before tightening. When both are aligned, the cap enters the same spot every time.

This usually leads to fewer issues such as:

Caps that sit slightly off-center

Inconsistent torque

Occasional cross-threading

In short, the parts help the machine repeat the same motion bottle after bottle.

Typical Uses

You will find these components in lines filling:

Drinking water and flavored beverages

Edible oils

Detergent and personal-care liquids

Pharmaceutical bottles

Most capping systems from Europe, North America, and Asia can use this style of ring and shaft, which makes them easy to integrate into existing lines.

About Baijinyi

Foshan Baijinyi Precise Technology Co., Ltd. has been manufacturing PET-packaging molds and accessories since 2011. Our factory in Sanshui covers more than 4,000 m² and supports blow-mold, preform-mold, and cap-compression projects.

Many of our customers run international equipment, so we design our parts to match the standards commonly used by well-known brands.

What you can expect from us:

Components built with stable tolerances

Experience from real production-line problems, not only CAD design

Support with bottle design, preform development, and machine improvement

A team that continually looks for better ways to build parts, in line with our name’s meaning: “Always moving one step forward.”

If you need reliable alignment parts for a capping system, our positioning ring and shaft are designed with that purpose in mind.