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What Is a Strip Brush Cup Form?

A strip brush cup form is an industrial strip brush bent and shaped into a circular or cup-like form, with a curved base following the desired profile and bristles arranged around the circumference. It is designed for applications requiring continuous circular surface contact, such as sealing around drilled holes, rotating shafts, or the edges of round components.

The key advantage of this brush type is its ability to be custom-formed to any required diameter, rather than being limited to standard sizes — making it ideal for applications that demand a precise, location-specific fit.

Types of Strip Brush Cup Forms

By Bristle Material

1. Nylon Strip Brush Cup Form

• The most versatile option — durable and highly flexible
• Ideal for sealing around drilled holes or rotating shafts

2. Steel/Stainless Steel Wire Strip Brush Cup Form

• Used where high strength and heat resistance are required
• Suitable for metalworking or heavy machinery applications

3. Polypropylene/Polyethylene (PP/PE) Strip Brush Cup Form

• Outstanding resistance to acids and alkalis
• Suitable for chemical industries or high-humidity environments

4. Horse Hair Strip Brush Cup Form

• Used for fine surface finishing or applying coatings around component edges

Key Specifications to Know

Common Applications

Strip brush cup forms are used across many industries:

• Sealing around drilled holes or pipes — blocking dust, debris, and drafts
• Sealing around rotating shafts — for machinery with continuous motion
• Filtering or trapping debris — around machine openings
• Packaging industry — sealing around container lids or box edges
• CNC machines — preventing chip and debris ejection around drilling or milling points

How to Choose the Right Strip Brush Cup Form

1. Determine the required ring diameter Measure the circular installation point precisely, as cup form brushes are custom-formed to exact specifications.

2. Consider the operating environment

• Wet or chemical-exposed applications → Choose plastic or nylon bristles
• High-strength requirements → Consider steel or stainless steel wire

3. Determine the required trim height Trim height must match the gap distance that needs to be sealed or filtered.

4. Match the core material to the installation structure A plastic core is lightweight and corrosion-free, while a metal core offers greater strength.

Safety Precautions

• Specify the diameter accurately before ordering, as this is a custom-formed product
• Choose bristle material appropriate for the operating environment
• Ensure secure, properly aligned installation for maximum performance
• Replace the brush when bristles are too worn to seal effectively

RHK’s Strip Brush Cup Form Services

RHK (Runghengkij) manufactures and supplies high-quality strip brush cup forms for all types of industrial applications. We offer custom-made cup form brushes with your specified diameter, trim height, bristle material, and core material — at factory-direct prices with nationwide delivery across Thailand.

📞 Contact us for inquiries and quotations: Contact Us

This article is produced by the RHK team — industrial brush specialists with over 30 years of experience.

FAQ

Q: Can a strip brush cup form be custom-made to a specific diameter? A: Yes. Strip brush cup forms are custom-formed products, and RHK can manufacture them to your exact diameter and specification requirements.

Q: What applications is a strip brush cup form used for? A: Common applications include sealing around drilled holes, rotating shafts, container lid edges, and preventing debris ejection in CNC machinery.

Q: Which bristle material is best for a strip brush cup form? A: It depends on the operating environment. Nylon or plastic bristles are recommended for wet or chemical exposure, while steel or stainless steel wire is recommended for applications requiring higher strength.