Pom Nylon Bearing 625zz Bearing Pulley Sliding Door Pressure Wheel

• Smooth Operation
  The spacer design ensures smooth rolling and no jamming, even when screws are fully tightened.
• Silent & High Load Pulley
  Combines quiet bearings with high load capacity for smooth, low-noise performance.
• Durable Materials
  The nylon-coated outer layer offers strength, toughness, and fatigue resistance.
• Precision Bearings
  High-quality bearing steel provides quiet, high-speed, and wear-resistant performance.
• Sealed & Dustproof
  Metal dust cover ensures tight sealing; smooth surface with no burrs for refined quality.

5mm Bore 625ZZ Plastic Idler Pulleys with Shielded Bearing Insert (Quiet, Low‑Drag)

Built for space‑constrained mechanisms, these compact idler pulleys run cleanly on a 5 mm shaft, keeping rolling resistance and operating noise low. The wheel uses a precisely formed polymer body with a shielded bearing insert at the core, supporting steady rotation even in assemblies where vibration, misalignment, or frequent cycling can quickly amplify friction.

To simplify design work and replacements, the series follows a consistent interface: every pulley shares a 5 mm bore and a 5 mm groove width. That means you can switch to a different outer diameter or overall width to suit clearance or load distribution—without changing your shaft size or reworking the mount.

Dimensions & Model Range (Typical)

This lineup covers practical sizes for small mechanisms and guiding tasks:

• Outer diameter (OD): approx. 15.5–24 mm
• Overall width: approx. 5–11 mm
• Color/material options: mainly white engineering plastic (commonly nylon or POM/acetal), plus a blue 20 mm OD variant for easy identification and applications where a slightly tougher, more forgiving contact feel is preferred (model dependent)

Materials That Suit Real Use

• White nylon / POM (acetal): chosen for low friction, good wear resistance, and clean rolling behavior on guides, belts, and cables.
• Blue variant: intended for users who want quick visual sorting, or a wheel surface that feels a touch more resilient under repeated contact.

Where These Pulleys Are Commonly Used

These pulleys are well suited to light-duty idler and guide roles such as:

• timing belt routing and tensioning in 3D printers
• filament guidance paths
• compact linear slides and small motion modules
• drawer or small track hardware replacements
• robotics builds, CNC jigs, and workshop fixtures
• cable guidance and general rolling contact applications

The integrated shielded bearing helps keep fine dust away from the rolling surfaces, supporting smooth rotation over longer service intervals in indoor or semi‑protected environments.

Installation & Fitment

Installation is straightforward: slide the pulley onto a 5 mm shaft, then secure using standard retaining hardware (washers, spacers, clips, collars—depending on your design). For best service life, keep the pulley aligned so it rolls true and avoids unnecessary side loading.

Quick Selection Guide

• Choose smaller OD models when clearance is tight or the wrap radius must be compact.
• Choose wider models when you want a steadier contact footprint or improved guidance stability.

• What are your payment terms?

  What are your payment terms?

  1.100% T/T in advance2.30% T/T deposit, 70% balance against copy of B/L3. PayPalPackaging Details: Standard export packing (plastic bag, carton, and pallet or wooden case), or as per customer's requirements.Delivery Port: Ningbo / ShanghaiDelivery Time: Normally within 30 days for ready goods or as per customer's request.

• How do you handle shipment?

  How do you handle shipment?

  For small orders: we ship via express (DHL, FedEx, UPS, TNT, etc.).For bulk orders: we ship by sea or by air, depending on your preference.

• How long is the production lead time?

  How long is the production lead time?

  For in-stock samples: shipped within 2 days.For out-of-stock samples: lead time is within 7 days.For mass production: approximately 15 days after receiving the deposit.

• What after-sales service do you offer for sliding rollers?

  What after-sales service do you offer for sliding rollers?

  We provide online technical support.  If the issue is caused by a quality defect, we will replace the defective items with new ones.

• How does your factory ensure quality control?

  How does your factory ensure quality control?

  80% of our staff have over 10 years of experience.  We have a mature and skilled technical team along with a comprehensive quality management system to ensure consistent product quality.

• Can we print our logo on the products?

  Can we print our logo on the products?

  Yes, we can print your logo on the products based on your design requirements.

• Can we customize our own color box?

  Can we customize our own color box?

  Yes, if your order quantity reaches 1,000 sets, we can provide customized color box packaging.

• Do you offer free samples?

  Do you offer free samples?

  Yes, we are happy to provide free samples for you to evaluate the quality.

• Are you a manufacturer?

  Are you a manufacturer?

  Yes, we are a professional manufacturer specializing in door and window roller pulleys for over 20 years. We also have our own international sales department and handle both production and sales in-house.

• How long does it take to receive a response after sending an inquiry?

  How long does it take to receive a response after sending an inquiry?

  We will reply to you within 6 working hours on business days.