--- title: "Precise Bearing Spacer Ring for Rock Wool Centrifuges" description: "Precise Bearing Spacer Ring for Rock Wool Centrifuges — Spacers, Bushings & Distance Sleeves. MOQ 1 piece, US$56.40 – 58.80." url: https://engineeringhardware.com/product/precise-bearing-spacer-ring-for-rock-wool-centrifuges/ source: Engineering Hardware & Fasteners --- # Precise Bearing Spacer Ring for Rock Wool Centrifuges [![Precise Bearing Spacer Ring for Rock Wool Centrifuges](https://img.engineeringhardware.com/Precise-Bearing-Spacer-Ring-for-Rock-Wool-Centrifuges.webp)](https://img.engineeringhardware.com/Precise-Bearing-Spacer-Ring-for-Rock-Wool-Centrifuges.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Spacers, Standoffs & Binding Hardware › Spacers, Bushings & Distance Sleeves](https://engineeringhardware.com/fastener-products/spacers-standoffs-binding-hardware/spacers-bushings-distance-sleeves/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/precise-bearing-spacer-ring-for-rock-wool-centrifuges.md) | **US$58.80**1–9 pieces | **US$56.40**10+ pieces | | --- | --- | MOQ 1 piece · Final price confirmed in your quote - **Standard:** China GB Code, Cast Steel / Forged Steel / Stainless Steel / High - **Surface Treatment:** Polishing, Passivation, etc. - **Material:** Steel, Alloy, Stainless Steel - **Color:** Customizable - **Commonly Used Materials:** Alloy Steel, Stainless Steel, etc. - **Maximum Customizable Temperature Resista:** 300℃ - **Premium and stable base material:** 42CrMo forgings undergo quenching and tempering plus stress relief treatment, featuring dense metallographic structure without sand holes or air pores and minimal deformation under high temperatures. - **Equipment Upgrade & Retrofit:** Upgrade conventional cast iron spacers to wear-resistant alloy steel versions to resolve frequent abrasion failures of roller heads. Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Precise%20Bearing%20Spacer%20Ring%20for%20Rock%20Wool%20Centrifuges%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fprecise-bearing-spacer-ring-for-rock-wool-centrifuges%2F) Specifications are as listed for this product. Engineering Hardware & Fasteners confirms ratings, mating parts, compatibility, packing and lead time with you before you order. ## Specifications | Application | Machinery Accessory | | --- | --- | | Standard | China GB Code, Cast Steel / Forged Steel / Stainless Steel / High | | Surface Treatment | Polishing, Passivation, etc. | | Production Type | Single Production | | Machining Method | CNC Machining | | Material | Steel, Alloy, Stainless Steel | | Color | Customizable | | Technical Support Provided | Provide Technical Support and Spare Parts Supply | | Process Flow | CNC Machining | | Commonly Used Materials | Alloy Steel, Stainless Steel, etc. | | Maximum Customizable Temperature Resista | 300℃ | | Classification | Matched Sets of Inner Spacer Sleeves and Outer SPA | | Thickness | Custom Thickness Available From 10 to 80 mm | | Transport Package | Ocean Shipping, Air, Wooden Box Packaging | | Specification | Customizable | | Origin | Taian | | HS Code | 7326901990 | | Premium and stable base material | 42CrMo forgings undergo quenching and tempering plus stress relief treatment, featuring dense metallographic structure without sand holes or air pores and minimal deformation under high temperatures. | | Precision machining across all processes | finish turning of inner and outer circles as well as surface grinding on both end faces; parallelism, perpendicularity and dimensional tolerances are strictly controlled to make it a precision-grade component. | | Excellent dimensional stability at high temperature | internal stress is eliminated via heat treatment, resulting in negligible dimensional variation under long-term working conditions around 200℃. | | Matched inner and outer ring sets | inner and outer spacer rings are delivered in matched pairs with ultra-small pairing errors within the same group, eliminating the need for selective fitting during equipment assembly. | | Wide versatility | standard specifications fit most mainstream domestic and imported rock wool fiberizing centrifuges. | | Core Application | Assembly of bearing assemblies at the roller head end of centrifuges for rock wool, slag wool and glass wool production lines. | | Equipment Maintenance & Replacement | Overhaul of centrifuge roller heads, replacement of damaged bearings and renewal of wearing parts on ageing equipment. | | Equipment Upgrade & Retrofit | Upgrade conventional cast iron spacers to wear-resistant alloy steel versions to resolve frequent abrasion failures of roller heads. | | Domestication of Imported Equipment | Substitution of original factory roller head spacer components for European, American and Japanese centrifuges. | | Extended Application on Similar Equipment | Positioning wear-resistant spacers for high-speed discharge roller shafts of analogous equipment in fiberglass and thermal insulation wool industries. | | Category | [Spacers, Bushings & Distance Sleeves](https://engineeringhardware.com/fastener-products/spacers-standoffs-binding-hardware/spacers-bushings-distance-sleeves/) | ## Description Precise Bearing Spacer Ring for Rock Wool Centrifuges is part of our spacers, bushings & distance sleeves range (Spacers, Standoffs & Binding Hardware). ### Key details - **Standard:** China GB Code, Cast Steel / Forged Steel / Stainless Steel / High - **Material:** Steel, Alloy, Stainless Steel - **Surface Treatment:** Polishing, Passivation, etc. - **Application:** Machinery Accessory - **Production Type:** Single Production - **Machining Method:** CNC Machining - **Color:** Customizable - **Technical Support Provided:** Provide Technical Support and Spare Parts Supply Available configurations include standard, surface treatment, material, color and commonly used materials. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 1 piece at US$56.40 – 58.80 per piece. Send one inquiry with the part number, quantity and destination, and Engineering Hardware & Fasteners confirms size, thread, material, grade, finish, price, lead time and shipping, checks the goods before dispatch and ships them to you. ## Frequently asked questions ### What is the minimum order quantity (MOQ) for Precise Bearing Spacer Ring for Rock Wool Centrifuges? The listed minimum order is 1 piece, at US$56.40 – 58.80 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size. ### How does the price change with quantity? Volume pricing: US$58.80 for 1–9 pieces; US$56.40 for 10+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote. ### What are the main specifications of Precise Bearing Spacer Ring for Rock Wool Centrifuges? Standard: China GB Code, Cast Steel / Forged Steel / Stainless Steel / High; Material: Steel, Alloy, Stainless Steel; Surface Treatment: Polishing, Passivation, etc.; Application: Machinery Accessory; Production Type: Single Production; Machining Method: CNC Machining. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include standard, surface treatment, material, color and commonly used materials. Size, thread, length, material and grade, surface finish, head marking, packaging and labels can be quoted to your specification or drawing. ### What is the lead time and how is it shipped? Lead time depends on quantity and customization and is confirmed in your quote. Engineering Hardware & Fasteners checks the goods before dispatch and ships by express, air or sea; mixed orders can be consolidated in one shipment. ### Which other spacers, bushings & distance sleeves are available? The Spacers, Bushings & Distance Sleeves category lists 2,111 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/spacers-standoffs-binding-hardware/spacers-bushings-distance-sleeves/](https://engineeringhardware.com/fastener-products/spacers-standoffs-binding-hardware/spacers-bushings-distance-sleeves/) How we work ## Specified, checked and shipped by Engineering Hardware & Fasteners Engineering Hardware & Fasteners supplies bolts, screws, nuts, washers, anchors, rivets and fastening hardware to equipment makers, contractors, distributors and maintenance teams. Orders go through one controlled process: size, thread, material, grade and finish confirmed, samples approved, dimensions, thread fit and plating checked before packing, then packed for export — standard or made to drawing. - DIN, ISO, ASTM, ANSI, JIS and GB standard parts - Non-standard parts made to your drawing - Dimensions, thread gauges and plating checked before packing - Export cartons and pallets, consolidated mixed orders - Samples available for approval before mass production [![Production floor](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor-1024x683.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor.webp) Production floor [![Inspection bench](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench.webp) Inspection bench [![Sorting & 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custom quote →](https://engineeringhardware.com/contact/) ## Request a quote for this product ## Related products [All Spacers, Bushings & Distance Sleeves →](https://engineeringhardware.com/fastener-products/spacers-standoffs-binding-hardware/spacers-bushings-distance-sleeves/) [![CNC 5 Axis Machined 7075 Aluminum Rear Wheel Spacer Kit](https://img.engineeringhardware.com/CNC-5-Axis-Machined-7075-Aluminum-Rear-Wheel-Spacer-Kit.webp)](https://engineeringhardware.com/product/cnc-5-axis-machined-7075-aluminum-rear-wheel-spacer-kit/) Spacers, Bushings & Distance Sleeves ### [CNC 5 Axis Machined 7075 Aluminum Rear Wheel Spacer Kit](https://engineeringhardware.com/product/cnc-5-axis-machined-7075-aluminum-rear-wheel-spacer-kit/) DIN, ASTM, GOST, GB, JIS, ANSI, BS · Aluminum **US$0.036 – 1.07**MOQ 1 piece [![Warm Edge Spacer Stainless Steel Fire Rated for Double Glazing 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