Part Number Cross-Reference
Atlas Copco and Epiroc use different part numbering formats across their catalogs. The following table maps all known references for the accumulator diaphragm used in COP series rock drills. Both part numbers refer to the same physical component and are fully interchangeable.
| Part Number | Format | Status | Description |
|---|---|---|---|
| 3115182200 | Full OEM (11-digit) | Original — superseded | Accumulator Rubber Diaphragm |
| 3115182201 | Full OEM (11-digit) | Current revision — active | Accumulator Rubber Diaphragm (revised) |
| 115182200 | Short format (9-digit) | Informal reference | Same as 3115182200 without leading "31" prefix |
| 115182201 | Short format (9-digit) | Informal reference | Same as 3115182201 without leading "31" prefix |
Understanding Atlas Copco Part Numbering
Atlas Copco part numbers typically use an 11-digit format starting with "31". The "31" prefix identifies the product group (underground rock excavation). When this prefix is dropped in informal communication or third-party catalogs, you get the 9-digit short format (e.g., 115182200). The final digit increment (00 to 01) indicates a revision — the higher number is the most current version.
Diaphragm to Rock Drill Model Mapping
The table below shows which rock drill models use the 3115182200 / 3115182201 accumulator diaphragm and the typical carrier rigs they mount on.
| Rock Drill Model | Diaphragm Part Number | Typical Carrier Rig | Application |
|---|---|---|---|
| COP 1238K | 3115182200 / 01 | Boomer S-series | Light face drilling |
| COP 1638HD | 3115182200 / 01 | Boomer M-series | Medium-duty tunneling |
| COP 1638HD+ | 3115182200 / 01 | Boomer M-series | Enhanced medium tunneling |
| COP 1838+ | 3115182200 / 01 | Boomer E3, M2D | High-perf face drilling |
| COP 1838HD | 3115182200 / 01 | Boomer E3, M2D | Heavy-duty hard rock |
| COP 1838HD+ | 3115182200 / 01 | Boomer E3, M2D | Advanced heavy-duty |
| COP 1838HE+ | 3115182200 / 01 | Boomer E3 | High-efficiency drilling |
| COP 1838ME | 3115182200 / 01 | Boomer M1D | Medium-energy drilling |
| COP 1838MUX | 3115182200 / 01 | Boomer E3, M2D | Multi-purpose |
| COP 1838MUX+ | 3115182200 / 01 | Boomer E3, M2D | Enhanced multi-purpose |
| COP 1840+ | 3115182200 / 01 | Boomer E3 | Next-gen high-power |
| COP 2238HD | 3115182200 / 01 | Simba | Production long-hole |
Atlas Copco to Epiroc Transition
In 2018, Atlas Copco completed the demerger of its mining and infrastructure division into a separate company called Epiroc. All underground rock drilling equipment — including the COP series rock drills, Boomer drill rigs, and Simba long-hole rigs — transferred to Epiroc. However, the part numbering system was largely preserved during the transition.
Key points for parts procurement:
- Part numbers starting with "31" (like 3115182200) remain valid in the Epiroc catalog
- Older Atlas Copco parts manuals still reference the same numbers
- Some parts received new "97" prefix numbers in the Epiroc system, but the accumulator diaphragm retained its original numbering
- Aftermarket suppliers like Babacan Rubber cross-reference both Atlas Copco and Epiroc catalogs to ensure correct part identification
For a comprehensive guide to COP series part numbering, see our Atlas Copco COP Series Part Number Cross-Reference Guide.
How to Verify Your Part Number
If you are unsure whether 3115182200 or 3115182201 is the correct diaphragm for your specific rock drill, here are several methods to confirm:
- Check the service manual — the parts list section of your COP rock drill service manual will list the accumulator diaphragm by part number
- Look at the existing part — the outgoing diaphragm or its packaging may carry a part number stamp or label
- Contact us — provide your rock drill model and serial number, and our technical team will confirm the correct part number from the relevant parts breakdown
- Check the Epiroc PartOnline portal — enter your machine serial number to access the official parts list