# PGN Bearings 5/8" Chrome Steel Bearing Balls G25 (100 Pcs, 15.875mm) | Precision Grade 25 Balls **Brand:** PGN Bearings **SKU:** xex0868 **ASIN:** B07K8S8YSF **Canonical URL:** https://crowcrowcrow.com/p/100-pieces-pgn-8in-0-625-precision-chrome-steel-bearing-balls-g25/xex0868 **Subcategory:** Categories **Availability:** in_stock **Price (INR, all-inclusive):** ₹3,257 **Discount:** 16% **Customer rating:** 4.60/5 from 548 ratings ## Description PGN Bearings G25 chrome steel balls (100 Pcs, 5/8" / 15.875mm) offer precision and durability for industrial use. Made from AISI 52100 steel, they ensure smooth, defect-free performance. Imported from USA, all duties included, arrives via ExpressBox tracked delivery within {{ccc_delivery_eta}}. ## Highlights - Grade 25 Precision — Each ball is manufactured to Grade 25 standards, ensuring exceptional accuracy and a smooth, defect-free surface for reliable operation in demanding industrial applications. - Durable AISI 52100 Chrome Steel — Constructed from high-quality AISI 52100 chrome steel, these balls offer superior hardness, wear resistance, and longevity, reducing the need for frequent replacements and maintenance. - Bulk Pack for Projects — Comes in a convenient pack of 100 pieces, providing ample supply for multiple applications or larger projects, ensuring you have enough components on hand. - ISO 9001:2008 Certified Quality — Adheres to ISO 9001:2008 standards, guaranteeing higher quality and durability. This certification ensures consistent product performance and reliability, reducing overall maintenance costs. ## Key features - G25 Chrome Steel Bearing Balls - ISO 9001:2008 Provides higher quality and durability, reducing replacement and maintenance cost - Diameter: 5/8", 0.625" Inches (15.875 millimeters) - Weight: 0.58004 ounces (16.44399 grams) ## Why choose this product - PGN Bearings G25 chrome steel balls are engineered for precision, offering a defect-free, ultra-smooth surface essential for high-performance machinery. Unlike generic steel balls, these meet stringent Grade 25 standards, ensuring consistent diameter and hardness. This translates to reduced friction, extended component life, and minimized downtime in industrial settings. Sourced directly from authorized US retailers, each ball is a testament to quality manufacturing. — Precision Engineering for Industrial Demands - These balls are best suited for applications demanding high precision, such as in specialized machinery, scientific instruments, or custom mechanical assemblies. They are not recommended for use in applications where extreme shock loads or corrosive environments are present, as they are made of chrome steel. For such conditions, sealed or stainless steel bearings would be more appropriate. — Ideal for Precision Machinery, Not for General Use ## How to use 1. Carefully examine each ball for any visible defects, ensuring they meet Grade 25 precision standards before installation. Verify dimensions match your shaft and housing requirements. — Inspect Balls 2. Apply a suitable grease lubricant to the bearing races or the balls themselves to ensure smooth rotation and prevent premature wear. Use a high-quality grease compatible with chrome steel. — Lubricate Appropriately 3. Install the balls into the bearing races or assembly with precision. Avoid applying excessive force or shock loads during installation to maintain the integrity of the balls and races. — Install with Care 4. Store unused balls in their original packaging in a dry environment to prevent rust. For extended storage, re-lubricate periodically. Protect installed bearings from dust and moisture. — Maintain and Protect ## Product details | Field | Value | |---|---| | Primary Material | Chrome Steel (AISI 52100) | | Hardness | High (typical for AISI 52100) | | Corrosion Resistance | Moderate (Chrome steel is susceptible to rust in humid conditions) | | Application | Precision machinery, industrial components, custom assemblies | | Lubrication | Grease (recommended) | | Cost per Ball | {{ccc_price_per_unit:100:ball}} | | Shelf life after opening | 12 months (if stored properly in original packaging) | | Contraindications | Not recommended for high-shock loads, extreme temperatures, or prolonged exposure to moisture/corrosive environments without proper sealing or lubrication. | | Allergens / common irritants | None identified | | Brand | PGN Bearings | | Part Number | PGN-5/8-CHR-100 | | Material | Chrome Steel (AISI 52100) | | Grade | 25 | | Diameter | 5/8" (15.875 mm) | | Quantity | 100 Pieces | | Weight per Ball | 16.44 grams (0.58004 ounces) | | Country of Origin | Not stated by manufacturer — US retail version, sourced from authorized US retailers | ## Frequently asked questions ### What is the difference between shielded (ZZ) and sealed (2RS) deep-groove ball bearings? Shielded (ZZ) bearings use metal shields that retain grease and block larger debris while allowing higher speeds. Sealed (2RS) bearings use rubber contact seals that give better protection against fine dust and moisture, which suits dusty or humid Indian conditions. Choose based on your speed and contamination needs. ### How do I know which deep-groove bearing size I need? Match the ISO designation, which encodes the dimensions — for example a 6203 has a 17mm bore, 40mm outer diameter and 12mm width. Measure your shaft diameter and housing bore, then select the bearing whose stated metric dimensions match exactly. ### Are PGN Bearings G25 chrome steel balls suitable for Indian conditions? These chrome steel balls offer excellent precision but are moderately resistant to rust. For high humidity or monsoon exposure in India, consider sealed bearings or stainless steel options to prevent corrosion during storage and use. Proper storage in a dry place is crucial. ### What is the precision grade of these PGN bearing balls? These PGN bearing balls are manufactured to Grade 25 precision. This signifies a high level of accuracy and a very smooth surface finish, ensuring minimal defects and consistent performance in demanding industrial applications. ### How to buy original PGN Bearings G25 chrome steel balls in India? PGN Bearings G25 chrome steel balls are sourced from authorized US retailers and imported directly for you. They are factory-sealed and come with all customs duties and GST included. Delivery is via ExpressBox tracked shipping within {{ccc_delivery_eta}}. ## Compliance Chrome steel is susceptible to rust in humid environments. Store in a dry place and ensure proper lubrication. Not intended for use in corrosive or high-moisture conditions without appropriate sealing or protection. Not suitable for safety-critical or aerospace applications unless specified by manufacturer. ## Images 1. https://images.crowcrowcrow.com/B07K8S8YSF-0.webp 2. https://images.crowcrowcrow.com/B07K8S8YSF-3.webp 3. https://images.crowcrowcrow.com/B07K8S8YSF-6.webp 4. https://images.crowcrowcrow.com/B07K8S8YSF-9.webp 5. https://images.crowcrowcrow.com/B07K8S8YSF-12.webp 6. https://images.crowcrowcrow.com/B07K8S8YSF-15.webp --- Source: https://crowcrowcrow.com/p/100-pieces-pgn-8in-0-625-precision-chrome-steel-bearing-balls-g25/xex0868 Returns: 30 days, free, by mail. Shipping: Free across India, 7–13 business days. Prices are all-inclusive (duties + GST).