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Bowed Roller

All you want to know about Bow Expander Roller.

In this industry-centric blog, we are going to elucidate about an important industrial product, the bow expander. Why is it called so? Since the shape of the product is similar to a bow, it has found its name from there.

In the ensuing sections, we will be covering a lot of important subjects related to the banana roll. This blog will further expand your knowledge about the subject. Industries using the product will draw benefits from the product.

Design and construction

To begin with, let’s share a brief about the design and construction of the bowed roller. The manufacturing-industry-centric product comprises a central beam with a bow in it, while bearings are mounted across the entire roll. At the same time, it is covered with a rubber covering over the bearings. It is also called a spreader roller.

A bit about the location of the bow expander roller now. As far as their location is concerned, the product is normally located before nipped rollers. That is before and after coating stations, after size presses, before drive points, and in long web runs. It is ideal for high speed application.

Types of a spreader roller

There are numerous types of spreader rolls. The advent of technology and innovation in the field has resulted in many new designs, including:

  • Bowed roller
  • Expander rolls
  • Concave roller
  • D-bar
  • Dual bowed roller
  • PoS-Z
  • Metallic bowed roller

How to measure the dimension? 

Considering its shape, many of you might be thinking, how do manufacturing companies measure its dimension?

According to industry experts, the amount of bow is measured by arc height divided by roll width X 100.

Unique features of the metal expander roll

The bowed roller is identified with unique features that set it apart from the crowd. Here are a few unique features of the product

  • Requires less maintenance
  • Width remains static
  • Resistant to abrasion
  • Resistant to chemicals
  • High tensile strength
  • Resistant to wear and tear
  • Resistant to scratching and bumping
  • Excellent coefficient of friction
  • Quickly compensates for small changes that occur in machine’s precision


The specifications of the bow roll vary from company to company, it primarily depends on the type of industry and requirement. Here is the standard specification of the product:

  • Thickness: 12 mm to 15 mm
  • Size: 100 mm to 600 mm


From the features section, let’s now shift our focus to the application of the product. As the product is versatile, it serves many purposes. A quality-driven product offers applications, like reducing slack ends, remove wrinkle, spreading, slit separation, coating batching, and re-winding among others.

Industries drawing benefits and advantages from the bow expander roller

The spreader rolls are integral to many web handling processes as a result the product has found its use in several industries. These includes:

  • Textile
  • Plastic
  • Paper
  • Printing
  • Laminating
  • Steel

Never settle for quality

Quality makes all the difference in production. Subsequently, it makes sense to buy a product only from a genuine and prominent manufacturer. A quality-driven product streamlines production and helps meet the production goals. Therefore, being a businessman or someone occupying a senior position in a manufacturing unit, it is your responsibility to ensure that your company procures only genuine bowed rollers from a leading rubber roller manufacturer.


A genuine bow expander roller has the potential to scale your production process, cutting down overhead costs. For a businessman, this is an ideal situation for a business. Money saved is money earned. Only buy from a leading rubber roller manufacturer.