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Reliable Epiroc Impact Piston 3115363502 Drill Tool COP 1838HD 1838+ Mining 3115 3635 02 Atlas Copco

Impact piston that keeps your COP 1838HD drilling – without the OEM price tag

Epiroc Impact Piston 3115363502 goes into Atlas Copco COP 1838HD, 1838+, and standard 1838 drifters. It's the part that takes the beating every shift—so if yours is worn or scored, hammer efficiency drops fast. This piston is machined to factory geometry from heat-treated alloy steel, weight is dead on 5 kg. Direct swap for part numbers 3115363502, 3115363501, 3115363500, and cross-compatible with 3115 3635 02, 3115 3635 01, 3115 3635 00.

We keep these in stock. Not dropshipped—physically in our warehouse, ready to ship same day if needed. You get a part that runs like the original, but you're not paying the brand markup.

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Reliable Epiroc Impact Piston 3115363502 Drill Tool COP 1838HD 1838+ Mining 3115 3635 02 Atlas Copco
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Reliable Epiroc Impact Piston 3115363502 Drill Tool COP 1838HD 1838+ Mining 3115 3635 02 Atlas Copco detail image 1
Reliable Epiroc Impact Piston 3115363502 Drill Tool COP 1838HD 1838+ Mining 3115 3635 02 Atlas Copco detail image 2
Highlights
Key Advantages
  • Machined to the exact stroke length and diameter as original Epiroc/Atlas Copco drawings—fits right, no shimming guesswork.
  • Heat-treated alloy steel, same hardness profile as the OEM piston so you're not replacing it twice as often.
  • 5 kg on the scale, every time. We weigh each piston before it leaves to catch any casting deviation.
  • Sits in our own warehouse. When a rig is down, we can get this on the next flight out—not "coming soon".
  • Works across the 3115363502 / 3501 / 3500 series and matches the 3115 3635 02 set. Fewer part numbers to stock.
Use Cases
Applications
  • Jumbos running COP 1838HD drifters in development headings—replacement during planned rebuilds.
  • Surface bench drilling where COP 1838+ hammers see high-impact hours and need pistons swapped on schedule.
  • Fleet maintenance programs that want to reduce genuine parts spend without altering drill performance.
  • Breakdown situations—keeping a spare on the shelf means you're back drilling same shift, not waiting a week.
Specs
Technical Specifications
Part Number3115363502 (also replaces 3115363501, 3115363500)
Drifter CompatibilityAtlas Copco COP 1838HD, COP 1838+, COP 1838
Cross Reference3115 3635 02 / 3115 3635 01 / 3115 3635 00
Weight5 kg (checked per unit)
Material & Heat TreatAlloy steel, through-hardened to OEM spec range
ManufacturingCNC machined, ISO 9001 facility
Stock LocationChina warehouse (physically in stock)
Details
Detailed Description

Reliable Epiroc Impact Piston 3115363502 3115363501 3115363500 Drilling Tool for COP 1838HD 1838+ 1838HD 1838 Mining Machinery parts 3115 3635 02 Atlas Copco 3115 3635 01 3115 3635 00 in stock Chinese Supplier  weight 5kg

3115027400 - Gear Wheel - 3115 0274 00
3115027600 - Guide-3115 0276 00
3115027700 - Coupling - 3115 0277 00
3115027750 - Coupling-3115 0277 50
3115027781 -  3115 0277 81
3115028500 - Side Bolt - 3115 0285 00
3115028600 - Dome Nut - 3115 0286 00
3115028700 - Washer - 3115 0287 00
3115028800 - Piston - 3115 0288 00
3115029700 - 3115 0297 00
3115029701 - Shim - 3115 0297 01
3115029702 - Shim - 3115 0297 02
3115029703 - Adjusting Shim - 3115 0297 03
3115032700 - GASKET 3115 0327 00
3115082100 - Shaft - 3115 0821 00
3115082180 - Motor Drive Shaft - 3115 0821 80
3115082300 - Washer - 3115 0823 00
3115082400 - Sleeve - 3115 0824 00
3115082500 - Guide-3115 0825 00
3115084400 - Impact Seal/Seal Kit-3115 0844 00
3115084500 - Impact Seal/Seal Kit - 3115 0845 00
3115097000 - 3115 0970 00
3115097000 - Impact Seal/SEAL KIT  -3115 0970 00 
3115101080 - hydraulic motor 3115 1010 80
3115101081 - hydraulic motor 3115 1010 81
3115101083 - hydraulic motor 3115 1010 83
3115103292 - Sealing Package - 3115 1032 92
3115107490 - Oring set - 3115 1074 90
3115110300 - 3115 1103 00
3115169090 - Seal Kit - 3115 1690 90
3115147000 - Driver - 3115 1470 00
3115153600 - Guida - 3115 1536 00
3115104790 - Oring set - 3115 1047 90
3115110400 - Rear Seal Housing-3115 1104 00
3115112900 - Stop Ring - 3115 1129 00
3115115600 - Seal Kit-3115 1156 00
3115116500 - STUD 3115 1165 00
3115117300 - piston 3115 1173 00
3115118500 - 3115 1185 00
3115118600 - Seal Housing-3115 1186 00
3115122400 - Buffer Seal - 3115 1224 00
3115122500 - Buffer Seal - 3115 1225 00
3115132400 - Diaphragm - 3115 1324 00
3115136200 - Front Head - 3115 1362 00
3115136300 - 3115 1363 00
3115136400 - Cover 3115 1364 00
3115136500 - Gear Housing 3115 1365 00
3115136580 - GEAR HOUSING 3115 1365 80
3115136600 - Middle body/INTERM PART - 3115 1366 00
3115136700 - Cylinder - 3115 1367 00
3115136800 - back head 3115 1368 00
3115141800 - VALVE COVER 3115 1418 00
3115143200 -  flushing head-3115 1432 00 
3115143400 - Stop Ring - 3115 1434 00
3115143500 - Guide - 3115 1435 00
3115143600 - Guide-3115 1436 00
3115143700 -  flushing head-3115 1437 00
3115145400 nut 3115 1454 00
3115145500 - 3115 1455 00
3115145700 - Side Bolt - 3115 1457 00
3115145800 - 3115 1458 00
3115147600 - 3115 1476 00
3115149000 - piston 3115 1490 00
3115152900 - VALVE COVER 3115 1529 00
3115153500 - 3115 1535 00
3115155750 - Stop Ring - 3115 1557 50
3115156700 - piston 3115 1557 50
3115156800 - back head 3115 1568 00
3115158200 - Driver - 3115 1582 00
3115162900 - 3115 1629 00
3115167100 - Piston Guide - 3115 1671 00
3115167101 - Piston Guide - 3115 1671 01
3115167200 - Piston Guide - 3115 1672 00
3115167300 - Piston Guide - 3115 1673 00
3115167400 - Piston Guide - 3115 1674 00
3115168000 - Piston Guide - 3115 1680 00
3115168001 - Piston Guide - 3115 1680 01
3115169200 - 3115 1692 00
3115169500 - Combined Seal Washer - 3115 1695 00/0661 1019 00
3115169700 Combined Seal Washer 3115 1697 00
3115169800 - 3115 1698 00
3115173100 - Seal Housing 3115 1731 00
3115173200 - Rotation chuck 3115 1732 00
3115173281 - Rotation Chuck Compl. - 3115 1732 81
3115173400 -  rotation chuck bushing-3115 1734 00
3115174600 - NOZZLE 3115 1746 00
3115174606 - NOZZLE 3115 1746 06
3115176300 - Accumulator 3115 1763 00
3115176500 - Valve Piston - 3115 1765 00
3115182200 - Diaphragm - 3115 1822 00
3115182201 - Diaphragm - 3115 1822 01
3115182300 - Valve Core Piston - 3115 1823 00
3115182500 - PLUG 3115 1825 00
3115184180 - Stop Ring - 3115 1841 80
3115187000 - PROTECTION PLUG-3115 1870 00
3115187600 - 3115 1876 00
3115187900 - buffer Seal Kit-3115 1879 00
3115188000 - buffer Seal Kit-3115 1880 00
3115188090 - buffer packet/Kit - 31151880 90
3115188100 - Bushing - 3115 1881 00
3115192602 - Diaphragm - 3115 1926 02
3115193800 - Connecting Plate - 3115 1938 00
3115194480 - Cylinder - 3115 1944 80
3115205300 - Impact Seal - 3115 2053 00
3115205500 - Seal Kit - 3115 2055 00
3115206300 - Back Head - 3115 2063 00
3115206400 - Rotation Chuck Bushing - 3115 2064 00
3115207290 - Buffer Packet - 3115 2072 90
3115207605 - Valve Cover - 3115 2076 05
3115207703 - Valve Cover - 3115 2077 03
3115207800 -  flushing head-3115 2078 00
3115207900 -  flushing head-3115 2079 00
3115208400 - Bushing - 3115 2084 00
3115211200 - Guide - 3115 2112 00
3115211300 - Side Bolt - 3115 2113 00
3115211301 - Side Bolt - 3115 2113 01
3115211400 - Connection Plate - 3115 2114 00
3115211600 - Seal Kit - 3115 2116 00
3115211780 - Stop Ring - 3115 2117 80
3115211800 - Guide - 3115 2118 00
3115218890 - 800 Hours Repair Kit - 3115 2118 90
3115211900 - Guide - 3115 2119 00
3115212000 - Flushing Head - 3115 2120 00
3115212100 - Flushing Head - 3115 2121 00
3115212200 - Stop Ring - 3115 2122 00
3115212380 - Stop Ring 3115 2123 80
3115212400 - Piston Guide - 3115 2124 00
3115212600 - Piston - 3115 2126 00
3115212900 - Piston - 3115 2129 00
3115216900/3115 2169 00
3115219681 - Test Valve - 3115 2196 81
3115220000 - Rotation steel bushing/Chuck Bushing - 3115 2200 00
3115222100 - Stud - 3115 2221 00
3115222302 - Guide - 3115 2223 02
3115223100 - Dirt-Proof Boot/Drill Collar - 3115 2231 00
3115223200 - DRILL COLLAR-3115 2232 00
3115223300/3115 2233 00
3115233300 - CUP SEAL/U-Ring-3115 2333 00
3115234000 - Gear Housing 3115 2340 00   
3115234080 - GEAR HOUSING 3115 2340 80
3115238200 - Damping Piston - 3115 2382 00
3115238300 - Valve Cone - 3115 2383 00
3115238400 - Valve Seat - 3115 2384 00
3115238500 - CUP SEAL-3115 2385 00
3115238600 - CUP SEAL-3115 2386 00
3115238700 - U-Ring - 3115 2387 00
3115240100 - PLUG 3115 2401 00
3115247200 - Diaphragm - 3115 2472 00
3115255400 - Impact Seal/Seal Kit - 3115 2554 00
3115255900 - Impact Seal - 3115 2559 00
3115256200 - Liner - 3115 2562 00
3115258200 - U-Ring - 3115 2582 00
3115258345 - INTERMED. PART
3115258381 - Intermediate Part - 3115 2583 81
3115261590 - Return Accumulator - 3115 2615 90
3115261591 - Return Accumulator - 3115 2615 91
3115261710 - Plug-3115 2617 10
3115264980 - Rot.Chuck,Compl - 3115 2649 80
3115265000 - Triangular Sleeve/Driver - 3115 2650 00
3115265101 - Side Bolt - 3115 2651 01
3115265200 - Side Bolt - 3115 2652 00
3115265300 - Side Bolt - 3115 2653 00
3115267000 - Liner - 3115 2670 00
3115269300 - U-Ring CUP SEAL - 3115 2693 00
3115269680 - Accumulator - 3115 2696 80
3115270080 - Accumulator - 3115 2700 80
3115270200 - SCREW 3115 2702 00
3115270210 - Screw-3115 2702 10
3115271490 - LABEL SET

FAQ
FAQ
Will this piston fit my COP 1838HD? What about the older 1838?
Yes, it fits COP 1838HD, 1838+, and the standard 1838. The key is the part number on your current piston—if it's 3115363502, 3115363501, 3115363500 or the assembly 3115 3635 02, it'll drop right in.
How can I be sure it's the right part before ordering?
Grab the number off your worn piston or the manual. If you only have the machine serial, send it over and we can cross-check. We've matched these for dozens of fleets, so we can usually confirm in minutes.
What does 5 kg mean for performance?
OEM spec is 5 kg. We don't do lighter castings that mess with impact energy. Every piston gets weighed—if it's off, it doesn't leave. You get consistent blow energy and the same hammer acceleration the drifter was designed for.
How fast can you ship if my rig is down?
If the order is in before 2pm China time, it can leave the same day. Air freight usually hits major hubs in 5–7 days, but we can do express if it's a critical breakdown. Just tell us how urgent it is and we'll give you real options.
Is this a genuine Epiroc part?
No, it's an aftermarket piston built to the same engineering data. You're not getting a box with the Epiroc logo, but you are getting a component that performs like the original for a fraction of the cost. Most of our mining customers make the switch after the first trial order.
What happens if the piston fails early?
We back it with a 12-month warranty. If there's a material or machining defect, we replace it. We also put serial numbers on them now, so we can trace any batch. Realistically, if it's installed right and your lubrication is decent, you'll get the same life as OEM.
Stock
Check Stock & Get a Quote
Tell us your part number and how fast you need it. We'll check physical stock and give you a delivery schedule that works.
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