{"product_id":"porter-cable-894734-piston-ring-genuine-oem-replacement-pneumatic-nailer-piston-ring","title":"Porter-Cable 894734 Piston Ring – Genuine OEM Replacement Pneumatic Nailer Piston Ring","description":"\u003cdiv class=\"\" data-turn-id-container=\"7fd03350-ebf3-4e31-aa04-7abd8a1b2daf\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-(--sticky-padding-top)\" dir=\"auto\" data-turn-id=\"7fd03350-ebf3-4e31-aa04-7abd8a1b2daf\" data-turn-id-container=\"7fd03350-ebf3-4e31-aa04-7abd8a1b2daf\" data-testid=\"conversation-turn-561\" data-turn=\"user\"\u003e\u003c\/section\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a564ce8-dd20-83ea-a458-fe6abd848766-15\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6a564ce8-dd20-83ea-a458-fe6abd848766-15\" data-turn-id-container=\"request-6a564ce8-dd20-83ea-a458-fe6abd848766-15\" data-testid=\"conversation-turn-562\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-15 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"07dbcac0-1ba1-4050-8f5a-4914260c89f2\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp data-start=\"0\" data-end=\"196\"\u003e\u003cstrong data-start=\"0\" data-end=\"16\"\u003ePart Number:\u003c\/strong\u003e 894734\u003cbr data-start=\"23\" data-end=\"26\"\u003e\u003cstrong data-start=\"26\" data-end=\"39\"\u003eCategory:\u003c\/strong\u003e Pneumatic Nailer Parts → Piston Components → Piston Rings\u003cbr data-start=\"97\" data-end=\"100\"\u003e\u003cstrong data-start=\"100\" data-end=\"109\"\u003eType:\u003c\/strong\u003e Porter-Cable 894734 Piston Ring – Genuine OEM Replacement Pneumatic Nailer Piston Ring\u003c\/p\u003e\n\u003chr data-start=\"198\" data-end=\"201\"\u003e\n\u003cp data-start=\"293\" data-end=\"957\"\u003eThe \u003cstrong data-start=\"297\" data-end=\"332\"\u003ePorter-Cable 894734 Piston Ring\u003c\/strong\u003e is a genuine OEM replacement piston ring designed for compatible \u003cstrong data-start=\"398\" data-end=\"445\"\u003ePorter-Cable pneumatic nailers and staplers\u003c\/strong\u003e. This precision metal ring installs on the top of the piston\/driver assembly, where it creates an airtight seal against the cylinder wall. The seal allows compressed air to build the pressure needed to drive fasteners with consistent force. Manufactured to original equipment specifications, the \u003cstrong data-start=\"742\" data-end=\"752\"\u003e894734\u003c\/strong\u003e provides a direct-fit replacement for worn or damaged piston rings, restoring proper pneumatic performance and reducing internal air leakage. It is sold individually.\u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"1160\" data-end=\"1163\"\u003e\n\u003ch2 data-section-id=\"939trr\" data-start=\"1165\" data-end=\"1191\"\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul data-start=\"1193\" data-end=\"1626\"\u003e\n\u003cli data-section-id=\"hnpdoj\" data-start=\"1193\" data-end=\"1218\"\u003e\n\u003cstrong data-start=\"1195\" data-end=\"1211\"\u003ePart Number:\u003c\/strong\u003e 894734\u003c\/li\u003e\n\u003cli data-section-id=\"vjgkmv\" data-start=\"1219\" data-end=\"1262\"\u003eGenuine OEM Porter-Cable replacement part\u003c\/li\u003e\n\u003cli data-section-id=\"10oqmsh\" data-start=\"1263\" data-end=\"1334\"\u003eReplacement piston ring for compatible pneumatic nailers and staplers\u003c\/li\u003e\n\u003cli data-section-id=\"of3w8i\" data-start=\"1335\" data-end=\"1393\"\u003eCreates an airtight seal between the piston and cylinder\u003c\/li\u003e\n\u003cli data-section-id=\"7iqz6u\" data-start=\"1394\" data-end=\"1453\"\u003eHelps restore proper driving power and firing consistency\u003c\/li\u003e\n\u003cli data-section-id=\"vgi90v\" data-start=\"1454\" data-end=\"1507\"\u003ePrecision metal construction with split-ring design\u003c\/li\u003e\n\u003cli data-section-id=\"p6iksq\" data-start=\"1508\" data-end=\"1536\"\u003eDirect-fit OEM replacement\u003c\/li\u003e\n\u003cli data-section-id=\"vgnwhe\" data-start=\"1537\" data-end=\"1626\"\u003eManufactured to original equipment specifications \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1628\" data-end=\"1631\"\u003e\n\u003ch2 data-section-id=\"1cgu054\" data-start=\"1633\" data-end=\"1660\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp data-start=\"1662\" data-end=\"1685\"\u003e\u003cstrong data-start=\"1662\" data-end=\"1678\"\u003ePart Number:\u003c\/strong\u003e 894734\u003c\/p\u003e\n\u003cp data-start=\"1687\" data-end=\"1742\"\u003e\u003cstrong data-start=\"1687\" data-end=\"1704\"\u003eManufacturer:\u003c\/strong\u003e Porter-Cable \/ Stanley Black \u0026amp; Decker\u003c\/p\u003e\n\u003cp data-start=\"1744\" data-end=\"1773\"\u003e\u003cstrong data-start=\"1744\" data-end=\"1761\"\u003eProduct Type:\u003c\/strong\u003e Piston Ring\u003c\/p\u003e\n\u003cp data-start=\"1775\" data-end=\"1803\"\u003e\u003cstrong data-start=\"1775\" data-end=\"1788\"\u003eMaterial:\u003c\/strong\u003e Hardened Metal\u003c\/p\u003e\n\u003cp data-start=\"1805\" data-end=\"1864\"\u003e\u003cstrong data-start=\"1805\" data-end=\"1821\"\u003eApplication:\u003c\/strong\u003e Pneumatic Nailer \u0026amp; Stapler Piston Assembly\u003c\/p\u003e\n\u003cp data-start=\"1866\" data-end=\"1883\"\u003e\u003cstrong data-start=\"1866\" data-end=\"1879\"\u003eOEM Part:\u003c\/strong\u003e Yes\u003c\/p\u003e\n\u003cp data-start=\"1885\" data-end=\"1954\"\u003e\u003cstrong data-start=\"1885\" data-end=\"1898\"\u003eQuantity:\u003c\/strong\u003e Sold Individually \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"1956\" data-end=\"1959\"\u003e\n\u003ch2 data-section-id=\"17z2fqi\" data-start=\"1961\" data-end=\"1987\"\u003eCompatible Applications\u003c\/h2\u003e\n\u003cp data-start=\"1989\" data-end=\"2109\"\u003eThe \u003cstrong data-start=\"1993\" data-end=\"2028\"\u003ePorter-Cable 894734 Piston Ring\u003c\/strong\u003e fits numerous compatible Porter-Cable pneumatic nailers and staplers, including:\u003c\/p\u003e\n\u003ch3 data-section-id=\"1u59pd8\" data-start=\"2111\" data-end=\"2127\"\u003ePorter-Cable\u003c\/h3\u003e\n\u003cul data-start=\"2129\" data-end=\"2282\"\u003e\n\u003cli data-section-id=\"1gyxonn\" data-start=\"2129\" data-end=\"2141\"\u003e\u003cstrong data-start=\"2131\" data-end=\"2141\"\u003eBN125A\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"1lki9by\" data-start=\"2142\" data-end=\"2153\"\u003e\u003cstrong data-start=\"2144\" data-end=\"2153\"\u003eBN138\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"1iu1aon\" data-start=\"2154\" data-end=\"2166\"\u003e\u003cstrong data-start=\"2156\" data-end=\"2166\"\u003eBN200A\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"1iu19w4\" data-start=\"2167\" data-end=\"2179\"\u003e\u003cstrong data-start=\"2169\" data-end=\"2179\"\u003eBN200B\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"p10wx3\" data-start=\"2180\" data-end=\"2212\"\u003e\n\u003cstrong data-start=\"2182\" data-end=\"2194\"\u003eBN200V12\u003c\/strong\u003e (Type 1 \u0026amp; Type 2)\u003c\/li\u003e\n\u003cli data-section-id=\"1a7wput\" data-start=\"2213\" data-end=\"2225\"\u003e\u003cstrong data-start=\"2215\" data-end=\"2225\"\u003eNS100A\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"1a7woyu\" data-start=\"2226\" data-end=\"2238\"\u003e\u003cstrong data-start=\"2228\" data-end=\"2238\"\u003eNS100B\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"qpjmhw\" data-start=\"2239\" data-end=\"2269\"\u003e\n\u003cstrong data-start=\"2241\" data-end=\"2251\"\u003eNS150A\u003c\/strong\u003e (Type 1 \u0026amp; Type 2)\u003c\/li\u003e\n\u003cli data-section-id=\"1a4f6qr\" data-start=\"2270\" data-end=\"2282\"\u003e\u003cstrong data-start=\"2272\" data-end=\"2282\"\u003eNS150B\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2284\" data-end=\"2438\"\u003eAlways verify your tool model, type number, and original part number before ordering to ensure proper compatibility. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"2440\" data-end=\"2443\"\u003e\n\u003ch2 data-section-id=\"czwlru\" data-start=\"2445\" data-end=\"2475\"\u003eFunction of the Piston Ring\u003c\/h2\u003e\n\u003cp data-start=\"2477\" data-end=\"2519\"\u003eThe \u003cstrong data-start=\"2481\" data-end=\"2503\"\u003e894734 Piston Ring\u003c\/strong\u003e is designed to:\u003c\/p\u003e\n\u003cul data-start=\"2521\" data-end=\"2816\"\u003e\n\u003cli data-section-id=\"zw5ws3\" data-start=\"2521\" data-end=\"2576\"\u003eForm an airtight seal between the piston and cylinder\u003c\/li\u003e\n\u003cli data-section-id=\"1hmu97r\" data-start=\"2577\" data-end=\"2633\"\u003eBuild compressed air pressure during each firing cycle\u003c\/li\u003e\n\u003cli data-section-id=\"1jcirm6\" data-start=\"2634\" data-end=\"2672\"\u003eMaximize driving force for fasteners\u003c\/li\u003e\n\u003cli data-section-id=\"tpg9hx\" data-start=\"2673\" data-end=\"2702\"\u003eReduce internal air leakage\u003c\/li\u003e\n\u003cli data-section-id=\"1koodc1\" data-start=\"2703\" data-end=\"2731\"\u003eImprove firing consistency\u003c\/li\u003e\n\u003cli data-section-id=\"1ktkfsi\" data-start=\"2732\" data-end=\"2816\"\u003eRestore the factory pneumatic sealing system \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2818\" data-end=\"2821\"\u003e\n\u003ch2 data-section-id=\"1cnbljb\" data-start=\"2823\" data-end=\"2860\"\u003eCommon Signs Replacement Is Needed\u003c\/h2\u003e\n\u003cp data-start=\"2862\" data-end=\"2900\"\u003eReplace the piston ring if you notice:\u003c\/p\u003e\n\u003cul data-start=\"2902\" data-end=\"3112\"\u003e\n\u003cli data-section-id=\"1mbcq8g\" data-start=\"2902\" data-end=\"2930\"\u003eReduced nail driving power\u003c\/li\u003e\n\u003cli data-section-id=\"1riud2l\" data-start=\"2931\" data-end=\"2956\"\u003eNails not fully seating\u003c\/li\u003e\n\u003cli data-section-id=\"10naxkx\" data-start=\"2957\" data-end=\"2986\"\u003eAir leaking past the piston\u003c\/li\u003e\n\u003cli data-section-id=\"1uf64zu\" data-start=\"2987\" data-end=\"3020\"\u003eInconsistent firing performance\u003c\/li\u003e\n\u003cli data-section-id=\"136vl2x\" data-start=\"3021\" data-end=\"3071\"\u003eVisible wear, cracks, or deformation of the ring\u003c\/li\u003e\n\u003cli data-section-id=\"fgc3xb\" data-start=\"3072\" data-end=\"3112\"\u003eExcessive piston-to-cylinder clearance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3114\" data-end=\"3277\"\u003eA worn piston ring allows compressed air to bypass the piston, reducing the pressure required to drive fasteners effectively. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"3279\" data-end=\"3282\"\u003e\n\u003ch2 data-section-id=\"10va281\" data-start=\"3284\" data-end=\"3315\"\u003eInstallation \u0026amp; Service Notes\u003c\/h2\u003e\n\u003cp data-start=\"3317\" data-end=\"3414\"\u003eDisconnect the nailer from the air supply and remove all fasteners before performing maintenance.\u003c\/p\u003e\n\u003cp data-start=\"3416\" data-end=\"4034\"\u003eRemove the head cap and carefully withdraw the piston\/driver assembly from the cylinder. Remove the worn \u003cstrong data-start=\"3521\" data-end=\"3543\"\u003e894734 Piston Ring\u003c\/strong\u003e, clean the piston groove and cylinder bore, and inspect the driver blade, cylinder, and O-rings for wear or damage. Install the new piston ring into the piston groove, ensuring it seats evenly without distortion. Reassemble the tool using pneumatic tool lubricant where specified by the manufacturer, then test the nailer for proper operation and air sealing before returning it to service. Typical installation time is approximately \u003cstrong data-start=\"3978\" data-end=\"3995\"\u003e15–30 minutes\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"4036\" data-end=\"4300\"\u003e\u003cstrong data-start=\"4036\" data-end=\"4050\"\u003eImportant:\u003c\/strong\u003e Inspect the cylinder and piston assembly whenever replacing the piston ring. If additional seals or O-rings show signs of wear, replacing them during the same service can help restore full pneumatic performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"4302\" data-end=\"4305\"\u003e\n\u003ch2 data-section-id=\"8fimbm\" data-start=\"4307\" data-end=\"4337\"\u003eMaintenance Recommendations\u003c\/h2\u003e\n\u003cul data-start=\"4339\" data-end=\"4787\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"138nisj\" data-start=\"4339\" data-end=\"4397\"\u003eLubricate the nailer as recommended by the manufacturer.\u003c\/li\u003e\n\u003cli data-section-id=\"1ctimd7\" data-start=\"4398\" data-end=\"4456\"\u003eUse clean, dry compressed air to minimize internal wear.\u003c\/li\u003e\n\u003cli data-section-id=\"1uyyyl3\" data-start=\"4457\" data-end=\"4517\"\u003eInspect the piston ring whenever the tool is disassembled.\u003c\/li\u003e\n\u003cli data-section-id=\"ro1vyf\" data-start=\"4518\" data-end=\"4582\"\u003eReplace worn O-rings and seals during major service intervals.\u003c\/li\u003e\n\u003cli data-section-id=\"jie5r2\" data-start=\"4583\" data-end=\"4628\"\u003eKeep the cylinder clean and free of debris.\u003c\/li\u003e\n\u003cli data-section-id=\"1ps317d\" data-start=\"4629\" data-end=\"4787\" data-is-last-node=\"\"\u003eUse genuine OEM replacement parts to maintain factory fit, proper sealing, and long-term pneumatic nailer performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Porter Cable","offers":[{"title":"Default Title","offer_id":53586469224811,"sku":"894734","price":13.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/9201\/5723\/files\/894734.jpg?v=1784652632","url":"https:\/\/generalsprayers.com\/products\/porter-cable-894734-piston-ring-genuine-oem-replacement-pneumatic-nailer-piston-ring","provider":"GeneralSprayers","version":"1.0","type":"link"}