3115082100 / 3115 0821 00 SHAFT ATLAS COPCO

If your drilling productivity depends on stable torque transfer and clean alignment through the rotation train, 3115082100 / 3115 0821 00 SHAFT ATLAS COPCO is one of those “quiet hero” components that keeps everything synchronized. This long, splined shaft is built to transmit rotational power across the drifter/rock drill drivetrain, linking rotating groups so torque arrives where it should—smoothly, predictably, and without the micro-slips that accelerate spline wear.

On the images you shared, the part presents as a straight, heat-treated steel shaft with splines at both ends, designed to mate with matching internal splines in coupling hubs/gear components. That geometry is typical of shafts used inside rock drill rotation systems where high shock loads, variable torque, and continuous lubrication demand consistent metallurgy, accurate spline form, and excellent straightness.

At 3GEN Export, we supply this component as an OEM-grade replacement built for demanding rock drilling conditions—and we ship worldwide in 5 working days.

What the 3115082100 / 3115 0821 00 SHAFT ATLAS COPCO does in the drill

The practical role of 3115082100 / 3115 0821 00 SHAFT ATLAS COPCO is simple to describe but hard to execute reliably: it transfers rotation while surviving the real-world chaos of rock drilling.

In operation, rotation isn’t just “spinning.” It’s:

• High torque during collaring and hard formation

• Rapid load changes as the bit bites, stalls, and releases

• Vibrations from percussion energy traveling through the assembly

• Heat from continuous operation and hydraulic flow

• Contamination risk if sealing, breathers, or filtration are compromised

A shaft in this zone must remain dimensionally consistent and mechanically stable. When it does, it supports:

• Smoother torque delivery to the rotation output

• Reduced stress on bearings and gear meshes

• Less spline chatter (which creates fretting and metallic debris)

• More consistent drilling performance and tool life

The 3115082100 / 3115 0821 00 SHAFT ATLAS COPCO is referenced in multiple parts listings and catalog contexts as “shaft/shaft complete” under the matching part number formats.

Key design features visible from the product images

1) Dual-ended spline interfaces

Your photos show pronounced spline sections at both ends, suggesting the shaft is designed to engage with two mating components (for example, a gear/drive hub on one side and a rotation transmission element on the other). This is a classic design for distributing load across splines and enabling precise axial positioning inside a gearbox or rotation group.

2) Straight, consistent shaft body

Long shafts live or die on straightness. Even small runout can cause:

• Vibration at speed

• Premature bearing wear

• Uneven spline contact

• Noise and heat buildup

A stable shaft body keeps rotation smooth under load.

3) Material and surface behavior suited to drilling loads

Rock drilling torque transfer parts are commonly produced from alloy steels with heat treatment to achieve a durable core and tough surface. The goal is not “brittle hardness,” but controlled strength that resists twisting while tolerating shock and cyclic fatigue.

Why the correct shaft matters more than people think

It’s easy to underestimate a shaft because it looks “simple.” But when a shaft is even slightly off, the entire system pays the price.

Common consequences of using a poor-fit shaft

• Spline wear that spreads quickly to the mating hub (turning a single-part replacement into a multi-part rebuild)

• Misalignment that increases friction and heat

• Vibration that loosens adjacent fasteners and stresses seals

• Metal debris in oil that accelerates bearing and gear damage

That’s why 3115082100 / 3115 0821 00 SHAFT ATLAS COPCO should be treated as a precision drivetrain component, not just a metal rod.

Typical application areas inside rock drill systems

Depending on the drill architecture, shafts in this form are frequently used in:

• Rotation transmission assemblies

• Gear housing / gear group interfaces

• Drivetrain links between motor/gear sets and rotation output

• Internal power transfer lines in drifter assemblies

Parts catalogs and product listings often position 3115082100 / 3115 0821 00 alongside gear housing and bearing references, which aligns with a drivetrain/gear group function.

Compatibility: ATLAS COPCO / Epiroc models commonly associated with this shaft

Online listings and catalog references commonly associate 3115082100 / 3115 0821 00 SHAFT ATLAS COPCO with multiple COP-series drifters and related drill setups. The following compatibility references are commonly shown:

COP series (commonly referenced)

• COP 1238

• COP 1838 / COP 1838HD+

• COP 1840

• COP 1850

• COP 2550

• COP 3050

• COP 3060

These are shown across parts listings for the same part number family.

Some listings also include related drill rigs/variants where the drifter family is used (for example RD-series references shown as “applicable to” in certain catalogs).

Important note: drill configurations can vary by serial range and rebuild history. The safest method is always to confirm with your parts book/BOM or serial-based lookup before ordering.

Technical expectations and practical specifications (what buyers usually need)

Because shaft specs can vary slightly by production batch and application, many sellers don’t publish full dimensional drawings publicly. Still, for 3115082100 / 3115 0821 00 SHAFT ATLAS COPCO, buyers typically care about the following engineering checkpoints:

Dimensional and geometric requirements

• Overall length (end-to-end)

• Spline count, module/DP, and pressure angle (per mating design)

• Spline engagement length on both ends

• Runout/straightness tolerance

• End geometry details (chamfers, pilot diameters, groove details if present)

Material and durability requirements

• Alloy steel suitable for torsional load and fatigue cycling

• Controlled heat treatment for strength + toughness balance

• Surface finish that reduces fretting and supports oil film stability

Fitment requirements

• Correct spline fit class to avoid backlash

• Correct axial positioning to avoid gear/bearing preload issues

• Compatibility with the mating hub’s wear state (heavily worn hubs can destroy a new shaft)

Weight in KG (best-practice guidance)

Exact net weight is not consistently published for this specific shaft across public listings. For a long, splined steel shaft of the size shown in your photos (approximately around the 1-meter class used in COP family rotation trains), a realistic part-only weight estimate is typically:

• Estimated net weight: ~ 6.5–8.0 kg (part only, without packaging)

If you want, I can calculate a tighter estimate if you share either:

• the shaft’s overall length, and

• the main body diameter (even approximate).

(Where public sources do show the part number inside drifter parts listings, they typically do not list the shaft’s standalone weight—only the drifter assembly’s weight and dimensions.)

Installation guidance for 3115082100 / 3115 0821 00 SHAFT ATLAS COPCO

Before installation

• Clean the housing and inspect oil passages

• Inspect the mating splines (hub/gear) for:

  • rounding of tooth flanks

  • fretting corrosion (dark powder)

  • cracks at spline roots

• Check bearings for roughness and axial play

• Verify correct lubrication grade and cleanliness

During installation

• Apply appropriate assembly lubricant/oil film to splines (as specified in the service procedure)

• Avoid forcing the shaft—misalignment during insertion can score the splines

• Ensure the shaft seats fully and rotates freely by hand before final closure

After installation

• Run a controlled test cycle and monitor:

  • unusual noise

  • temperature rise

  • vibration

  • oil contamination (first oil check is valuable after early run-in)

Troubleshooting: symptoms that point to a shaft issue

If 3115082100 / 3115 0821 00 SHAFT ATLAS COPCO (or its mating components) is worn or damaged, typical symptoms include:

• Increasing rotation noise under load

• Rotation “hesitation” or uneven torque delivery

• Metallic particles appearing in oil filters or magnetic plugs

• Elevated bearing temperatures

• Recurrent seal leakage due to vibration

In hard drilling environments, a shaft problem is often discovered after it has already started damaging a mating hub or bearing—so early detection saves money.

How 3GEN Export supports your drilling uptime

When you order 3115082100 / 3115 0821 00 SHAFT ATLAS COPCO from 3GEN Export, you’re not just buying a replacement part—you’re buying control over downtime.

• OEM-grade supply for demanding drilling conditions

• Worldwide delivery in 5 working days

• Export-ready packaging and shipping coordination

• Support for cross-checking part number formats (3115082100 / 3115 0821 00)

If you share your drifter model (example: COP 1838HD+, COP 1840, COP 2550, etc.) and serial range, I can also help you tighten compatibility and reduce the chance of ordering the wrong variant.

Buyer checklist (fast verification before purchase)

Use this quick checklist before you place the order:

• Confirm the part number format:

  • 3115082100

  • 3115 0821 00

  • 3115-0821-00

• Confirm your drifter family:

  • COP 1238 / 1838 / 1840 / 1850 / 2550 / 3050 / 3060 (commonly referenced)

• Confirm mating spline condition (avoid installing a new shaft into a severely worn hub)

• Confirm lubricant condition and cleanliness (contamination kills drivetrain parts)

Manufactured in Turkey, these products are made using the latest technologies and built to meet the highest international standards. Each machine is a high-quality copy of the original, ensuring durability, precision, and performance that you can rely on for modern construction and metalworking projects.