For industrial distributors servicing specialized fabrication sectors or specific regional markets, the 4-inch (100mm) metal grinding wheel is a critical inventory asset. Unlike larger standard discs, the compact 100×6.0x16mm profile is engineered specifically for high-agility material removal in confined spaces and intricate metalworking tasks.
Manufactured to meet rigorous B2B procurement standards, our T27 4-inch grinding discs feature a dedicated 16mm bore designed exclusively for compact angle grinders. By combining premium aluminum oxide grains with a high-strength phenolic resin bond, we provide global wholesalers with a consumable that delivers aggressive cut rates while maintaining the extreme structural integrity required for 15,200 RPM operations.
Engineered for Confined Space Fabrication & Extreme RPM
The primary advantage of a 4-inch grinding disc lies in its maneuverability. However, its compact diameter dictates a significantly higher rotational speed to maintain the optimal 80 m/s cutting velocity. This presents unique manufacturing challenges that separate premium OEM suppliers from lower-tier factories:
- Vibration-Free 15,200 RPM: At over fifteen thousand revolutions per minute, even microscopic mass imbalances can cause severe tool chatter and operator injury. We implement strict dynamic balance protocols on our 100mm production lines, ensuring smooth power transfer and extending the lifespan of the grinder’s internal bearings.
- Agile Material Removal: The 100mm diameter allows operators to access tight corners, complex pipe joints, and narrow structural steel channels that larger wheels simply cannot reach.
- 16mm Spindle Precision: We precision-press the center metal ring to an exact 16mm tolerance. This guarantees a secure, concentric fit on compact grinders, preventing the dangerous wheel slippage associated with poorly manufactured arbor holes.
Regional Supply & Batch Consistency
We recognize that the 100mm grinding wheel is a high-volume driver in specific global markets, including Southeast Asia, the Middle East, and South America. Our manufacturing capacity is scaled to support continuous wholesale distribution channels in these regions.
- Controlled Resin Curing: To prevent the abrasive wheel from softening or shedding prematurely in high-humidity regional climates, our tunnel kilns lock the abrasive matrix in a fully cross-linked resin bond, guaranteeing consistent shelf life and B2B batch uniformity.
- Heavy-Duty Structural Mesh: Reinforced with high-tensile fiberglass net, the disc safely absorbs the aggressive lateral pressure exerted during heavy steel corner grinding.
Technical Specifications for Procurement
| Specification | Technical Parameter |
| Dimensions | 100 x 6.0 x 16 mm (4″ x 1/4″ x 5/8″) |
| Arbor Size (Bore) | 16mm (Exclusive to 100mm angle grinders) |
| Wheel Profile | Type 27 (Depressed Center) |
| Abrasive Material | Premium Aluminum Oxide |
| Bonding System | Phenolic Resin Bonded (BF) |
| Max Operating Speed | 80 m/s |
| Max RPM | 15,200 RPM |
| Application Focus | Confined space grinding, weld blending, corner smoothing |
OEM Customization & Wholesale Logistics
Align your abrasive portfolio with a manufacturing partner capable of protecting your margins and brand reputation.
- Private Label OEM: We offer full customization of the center label. We print your corporate logo, customized grit specifications, and mandatory EN 12413 safety pictograms directly onto the wheel with absolute clarity.
- Pallet-Optimized Packaging: Our B2B export configuration involves moisture-proof shrink wrapping and high-density corrugated cartons. This maximizes container loading efficiency, significantly reducing your per-unit sea freight costs.
Contact our export sales engineering team to discuss wholesale pricing structures, request OEM samples, and secure reliable supply chain fulfillment for your 4-inch grinding disc inventory.
Frequently Asked Questions for Wholesale & Procurement
No. Standard 4-inch grinding wheels feature a 16mm (5/8″) center bore, whereas 4.5-inch grinders utilize a larger 22.2mm (7/8″) arbor spindle. Modifying the wheel’s center hole or attempting to force a fit will instantly destroy the tool’s concentricity, leading to severe vibration and catastrophic wheel failure at high speeds. Distributors must ensure end-users specifically match the 16mm bore to compact 100mm grinders.
Abrasive cutting dynamics are governed by peripheral speed, with 80 meters per second (m/s) being the industry standard for safe, efficient metal grinding. Because a 100mm disc has a smaller circumference than a 115mm or 125mm wheel, it must rotate at a significantly higher RPM to hit that 80 m/s threshold. Our B2B manufacturing process includes strict dynamic balance testing to ensure the fiberglass matrix safely withstands the extreme centrifugal forces generated at 15,200 RPM.
The 4-inch wheel is the undisputed choice for confined space metalworking. It excels in tight structural steel corners, pipe saddling, and shipyard repair where larger tool guards cannot physically fit. Furthermore, the compact size allows for lighter tool weight, drastically reducing operator fatigue during overhead weld preparation or extended single-handed surface blending.
No, and B2B suppliers should actively educate buyers to prevent misapplication. These Type 27 discs utilize an aluminum oxide grain and phenolic resin bond formulated exclusively for high-tensile ferrous metals (carbon steel, structural iron). Grinding concrete or masonry will cause the grains to blunt instantly without self-sharpening, glazing the wheel and causing dangerous heat buildup. For masonry applications, distributors should stock our dedicated silicon carbide abrasive line.
The phenolic resin binders used in abrasive wheels are naturally hygroscopic. If pallets are stored in high-humidity environments with severe temperature fluctuations, the resin matrix can absorb moisture, weakening the structural integrity of the disc over time. To protect your B2B inventory, our 4-inch wheels are tightly shrink-wrapped prior to boxing. Distributors must store cartons off the ground in a dry, climate-controlled warehouse and implement a strict First-In-First-Out (FIFO) rotation based on the 3-year V-date (expiration date) stamped on the metal ring.
English 
العربية 
Español 
Polski 
Русский 
