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3125307200
Epiroc
3125307200
Hello, Mine Owners and Maintenance Chiefs! I am the supplier who specializes in solving problems like "slewing noise," "drill pipe wobble," and "burned-out bearings." Today, I’m recommending a "small part that looks like a simple ring but plays a massive role"—the Elastic Slotted Bushing for Mining Drills.
Anyone in mining knows that drill rigs work under brutal force. The vibrations during rotation and feeding are intense enough to rattle your teeth loose. Under this "bang-bang" violence, metal-on-metal contact without clearance wears out holes in three months. Gaps appear, the equipment starts clanging, leading to snapped drill pipes and burned bearings. Many cheap bushings on the market are just ordinary steel rings—no elasticity, no slot. They fit dead tight, failing to absorb vibration or dissipate stress, which accelerates component wear. Our slotted bushing is specifically engineered for drill pipe assemblies and slewing bearings. It isn't just a spacer; it's a "flexible damper." Choose us to equip your equipment's joints with a "protective buffer," allowing it to operate smoothly without wobbling, even under high vibration and heavy loads.
High-Strength Alloy Steel: Hard Yet Tough:
The bushing must be wear-resistant yet capable of flexing.
Material: We use high-strength alloy steel (e.g., 65Mn spring steel or 40Cr alloy steel). This isn't ordinary Q235 iron; it's material used for springs and gears. It has high hardness, excellent wear resistance, and can withstand thousands of drill impacts. Simultaneously, it retains high toughness, allowing slight deformation under stress without brittle fracture.
Process: Manufactured via precision turning and milling. The concentricity of the inner and outer diameters is high, ensuring uniform stress distribution and preventing eccentric wear.
Axial Slot Design: Built-in "Breathing Room":
This is the soul of the bushing.
Elastic Compensation: The "slot" isn't a defect; it's a design feature. It provides radial elastic preload. When the shaft expands due to heat or deforms under load, the bushing contracts or expands accordingly, always gripping the shaft tightly and eliminating clearance.
Gap Killer: As equipment ages, bearing play increases. Installing this bushing automatically fills those microscopic gaps. The slewing mechanism loses that "clunk-clunk" slack feeling, making the rig smoother to operate.
Reduces Wear, Protects Expensive Components:
The bushing is a sacrificial part designed to protect the main shaft and bearings.
Wear Layer: The surface undergoes heat treatment or phosphating. It has a low friction coefficient and high wear resistance. If it wears out, replacing the bushing costs tens of dollars; wearing out the main shaft or slewing bearing costs tens of thousands in major repairs.
Heat Dissipation: Proper fit reduces dry friction between metals, lowering heat generation and preventing high-temperature grease loss.
Adapts to Mining's "Brutal Aesthetics":
Impact Resistant: Under massive torque impacts during hard rock drilling or bit jams, its elastic structure absorbs shock energy, protecting downstream hydraulic motors and gearboxes.
Dust Resistant: When used with grease, it effectively blocks external rock dust from entering the bearing.
Parameter | Specification |
|---|---|
Product Name | Elastic Slotted Bushing / Tension Sleeve / Positioning Collar |
Core Material | 65Mn Spring Steel / 40Cr Alloy Steel |
Key Features | Axial Slot, Elastic Compensation, Gap Elimination, Shock Absorption |
Compatible Locations | Drill Pipe Carriers, Slew Bearings, Hydraulic Cylinder Lugs, Linkages |
Working Conditions | High Vibration, Heavy Load, Frequent Impact Mining Operations |
Drill Pipe Carriers: Supporting the drill pipe, eliminating radial runout during rotation to prevent hole deviation.
Slew Bearings (Turntables): Installed between the turntable and pinion to eliminate mesh clearance, reduce noise, and prevent tooth breakage.
Hydraulic Cylinder Lugs: Acting as the bearing bushing for cylinder-to-frame connections, absorbing impact and preventing pin wear.
Linkage Mechanisms: Bushings for various swinging and reciprocating motion parts, replacing traditional bronze sleeves without needing oiling.
Full Range, Ready to Ship: Regardless of your bore size or outer diameter, we have ready-made stock. Just measure your old part, and we ship immediately.
Excellent Elasticity, Perfect Fit: We guarantee our bushings have superior slot elasticity. Once installed, the gap disappears, and the equipment stops wobbling. If it remains loose after installation, we replace it.
Value for Money: We don't sell the cheapest, because they lack elasticity and are useless once installed—a waste of effort. We sell the most effective. Do the math: using our bushings protects bearings worth tens of thousands; the savings could buy a train car full of bushings.
A Quick Tip for the Mechanics:
Brothers, installing this bushing is precise and technical work.
Clean the Shaft Neck. Before installing, thoroughly polish the shaft, removing all rust and burrs. Otherwise, the bushing gets scratched upon installation, drastically shortening its life.
Apply Grease. Coat the inner wall of the bushing and the shaft neck generously with extreme pressure lithium grease. It cannot run dry; lubrication is mandatory.
Tighten Evenly. If it comes with a lock nut, tighten it evenly in a crisscross pattern. Don't pull one side tight; that will deform the bushing, seize the shaft, and prevent rotation.
Regular Inspection. This is a wearable part. Check it monthly for wear. Replace it when it gets thin—don't begrudge the small cost. Safe travels home are what matter most!
