Navigating the part numbering system for Atlas Copco and Epiroc COP series rock drills can be confusing, especially since the 2018 demerger that split Epiroc from Atlas Copco. Parts catalogs, service manuals, and workshop documentation may reference numbers under either brand name, and revision suffixes add another layer of complexity. This guide aims to clarify the part numbering structure and provide practical cross-reference information for the most commonly needed accumulator and rubber components.
Understanding the Atlas Copco Part Number Structure
Atlas Copco uses a structured 11-digit part numbering system for underground rock excavation equipment. Understanding this structure helps maintenance teams verify part numbers and identify potential cross-references:
| Position | Digits | Meaning | Example |
|---|---|---|---|
| Prefix | Digits 1-2 | Product group identifier | "31" = Underground rock excavation |
| Category | Digits 3-4 | Component category | "15" = Rock drill internal components |
| Sequence | Digits 5-9 | Unique part sequence number | "18220" = specific diaphragm design |
| Revision | Digits 10-11 | Revision level (00, 01, 02...) | "00" = original, "01" = first revision |
Using this structure, we can decode the 3115182200 accumulator diaphragm: "31" (underground rock excavation) + "15" (rock drill components) + "18220" (specific part sequence) + "00" (original revision). When this was revised to 3115182201, only the final two digits changed from "00" to "01".
The Atlas Copco to Epiroc Transition
In January 2018, Atlas Copco completed the demerger of its Mining and Rock Excavation Technique business area into a separate publicly listed company called Epiroc. This transition affected how rock drilling equipment and spare parts are branded, marketed, and catalogued, but the impact on the actual part numbering system was relatively modest.
What Changed
- Brand name on packaging changed from "Atlas Copco" to "Epiroc" for new production
- Epiroc established its own PartOnline digital catalog system
- Some parts received new "97" prefix catalog references in the Epiroc system
- Marketing materials and service documentation were gradually rebranded
What Stayed the Same
- The core 11-digit part numbering system was preserved
- Most "31" prefix part numbers (including 3115182200) remain valid in the Epiroc catalog
- Physical component specifications did not change as a result of the demerger
- Service manuals published before 2018 still contain correct part numbers
For maintenance teams, the practical implication is that part numbers found in older Atlas Copco documentation are almost always still valid when ordering from Epiroc or aftermarket suppliers. If a specific number has been superseded, the Epiroc PartOnline system will redirect to the current active number.
Accumulator Diaphragm Cross-Reference Table
The following table maps the accumulator diaphragm part numbers across all COP series rock drill models. This is the primary cross-reference for the component we manufacture and supply.
| Original Part No. | Current Part No. | Description | Compatible COP Models |
|---|---|---|---|
| 3115182200 | 3115182201 | Accumulator Rubber Diaphragm | COP 1238K, 1638HD, 1638HD+, 1838+, 1838HD, 1838HD+, 1838HE+, 1838ME, 1838MUX, 1838MUX+, 1840+, 2238HD |
COP Rock Drill Model Reference
The COP (Computer Optimized Percussion) family spans multiple displacement classes, each identified by a four-digit number. Understanding the model numbering helps when cross-referencing parts across the family.
| Model Family | Variants | Displacement Class | Primary Application | Carrier Rigs |
|---|---|---|---|---|
| COP 1238 | 1238K | 12 kW class | Light face drilling, narrow vein | Boomer S-series |
| COP 1638 | 1638HD, 1638HD+ | 16 kW class | Medium-duty tunneling, development | Boomer M-series |
| COP 1838 | 1838+, HD, HD+, HE+, ME, MUX, MUX+ | 18 kW class | High-performance face drilling | Boomer E3, M1D, M2D |
| COP 1840 | 1840+ | 18 kW class (enhanced) | Next-generation high-power | Boomer E3 |
| COP 2238 | 2238HD | 22 kW class | Production long-hole drilling | Simba |
Variant Suffix Decoder
The letter suffixes after the model number indicate specific performance characteristics. Understanding these helps when discussing parts requirements with suppliers or interpreting service documentation.
| Suffix | Meaning | Implication for Parts |
|---|---|---|
| K | Compact design | May use different housing dimensions |
| HD | Heavy Duty | Reinforced internals, same accumulator |
| HD+ | Enhanced Heavy Duty | Same accumulator as HD |
| HE+ | High Efficiency | Optimized energy transfer, same accumulator |
| ME | Medium Energy | Reduced percussion power, same accumulator |
| MUX | Multi-Purpose | Adaptive percussion, same accumulator |
| MUX+ | Enhanced Multi-Purpose | Same accumulator as MUX |
| + | Enhanced / Updated version | Generally same parts as base model |
The key takeaway for parts procurement: despite the wide range of variant suffixes, the accumulator diaphragm (3115182200 / 3115182201) is common across all listed variants. The differences between models relate to percussion tuning parameters, control valve settings, and internal component material grades — not the accumulator housing or diaphragm specification.
Tips for Parts Identification
When searching for COP rock drill parts, keep these practical tips in mind:
- Use the full 11-digit number when possible. The short 9-digit format (e.g., 115182200) may return ambiguous results in some catalog systems.
- Check for superseded numbers. If a catalog shows "no results" for a number from an older manual, it may have been revised. Try incrementing the last two digits (e.g., from 00 to 01).
- Record the rock drill serial number. This is the most reliable way to identify the correct parts list for your specific drill, as production date and configuration may affect which parts are fitted.
- Cross-reference with your aftermarket supplier. Experienced suppliers like Babacan Rubber maintain databases that map original, revised, and alternative part numbers to help you find the right component quickly.
- Verify physical dimensions. When in doubt, measure the existing component and compare against the replacement. For diaphragms, key dimensions are outer diameter, thickness, and sealing lip profile.
Need Help Identifying a Part?
If you cannot find the correct part number for your COP rock drill component, contact our technical team. Provide the rock drill model, serial number, and a description or photo of the component you need. We will cross-reference it against our database and confirm the correct part number and availability.
For the accumulator diaphragm specifically, visit our main 3115182200 product page for complete specifications, or the cross-reference table for a quick lookup.