{"product_id":"sherline-4-jaw-chuck-pocket-nc","title":"Sherline 4-Jaw Chuck for Pocket NC","description":"\u003cp class=\"lede\"\u003e\u003cstrong\u003eIndependent 4-jaw chuck workholding for the Pocket NC.\u003c\/strong\u003e Sherline-made, Pocket NC trunnion adapter included. Hold round, square, or irregular stock — including off-centre and asymmetric workpieces — with the precision and clamping force a 3-jaw or vise can't match.\u003c\/p\u003e\n\n\u003ch2\u003eWhy a 4-jaw chuck\u003c\/h2\u003e\n\u003cp\u003eA 3-jaw self-centering chuck only grips concentric round stock. A vise only grips parallel-sided stock. The 4-jaw independent chuck holds \u003cstrong\u003eanything you can pull into the centre with four screws\u003c\/strong\u003e — round, square, hex, rectangular, cast forms, and intentionally off-axis features.\u003c\/p\u003e\n\n\u003cp\u003eFor Pocket NC owners, this opens up:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWatch components \u0026amp; jewellery\u003c\/strong\u003e — eccentric features, off-centre bores, small cylindrical stock\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCast parts\u003c\/strong\u003e — clamp on the rough exterior while machining the inside\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLong round stock\u003c\/strong\u003e — turn-style holding for cylindrical workpieces longer than vise jaws can grip\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOff-axis features\u003c\/strong\u003e — clamp a part deliberately off-centre to machine bolt holes or sockets at an offset\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHexagonal \u0026amp; square stock\u003c\/strong\u003e — direct gripping without soft-jaw machining\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eSherline Products Inc. (USA)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eIndependent 4-jaw chuck\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eJaw action\u003c\/td\u003e\n\u003ctd\u003eIndependent (each jaw adjusted separately for asymmetric holds)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eJaws\u003c\/td\u003e\n\u003ctd\u003eReversible — internal \u0026amp; external gripping\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTrunnion mount\u003c\/td\u003e\n\u003ctd\u003ePocket NC adapter plate included\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003ePocket NC V2-10 · V2-50 CHB · V2-50 CHK\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHardened steel chuck body, hardened reversible jaws\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCentering tolerance\u003c\/td\u003e\n\u003ctd\u003eEach jaw independently set with a dial indicator (±0.01 mm achievable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMade in\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eSherline 4-jaw independent chuck\u003c\/li\u003e\n  \u003cli\u003eSet of 4 reversible jaws (already installed)\u003c\/li\u003e\n  \u003cli\u003ePocket NC trunnion adapter plate\u003c\/li\u003e\n  \u003cli\u003eChuck key\u003c\/li\u003e\n  \u003cli\u003e4× M5 mounting screws\u003c\/li\u003e\n  \u003cli\u003eSetup guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSetup on the Pocket NC\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eRemove your existing vise or fixture from the trunnion table\u003c\/li\u003e\n  \u003cli\u003eBolt the Pocket NC adapter plate to the trunnion using the 4× M5 cap screws\u003c\/li\u003e\n  \u003cli\u003eMount the chuck onto the adapter — register pin aligns the chuck centre to the trunnion centre\u003c\/li\u003e\n  \u003cli\u003eTighten the chuck retainer\u003c\/li\u003e\n  \u003cli\u003eRe-set your G54 origin (trunnion centre is now the chuck face)\u003c\/li\u003e\n  \u003cli\u003eFor dial-indicated truing: rotate the trunnion to expose each jaw, adjust each jaw screw until the indicator reads within target tolerance\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003e4-jaw vs LANG vise vs standard Pocket NC vise\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eHolding need\u003c\/th\u003e\n\u003cth\u003eBest fit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eParallel-sided block stock\u003c\/td\u003e\n\u003ctd\u003eStandard Pocket NC vise (included with machine)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRepeatable production setups\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/es\/collections\/vises-fixtures\"\u003eLANG Self-Centering Vise Kit\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRound stock — concentric holding\u003c\/td\u003e\n\u003ctd\u003e3-jaw self-centering (separate accessory)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRound \/ square \/ irregular \/ off-axis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eThis 4-jaw chuck\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWatch \/ jewellery \/ micro work\u003c\/td\u003e\n\u003ctd\u003eThis 4-jaw chuck (with soft jaws)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eWill it fit the V2-50 too?\u003c\/h3\u003e\n\u003cp\u003eYes — same trunnion mounting pattern across V2-10 and V2-50 (CHB and CHK). The adapter plate is universal.\u003c\/p\u003e\n\n\u003ch3\u003eCan I use soft jaws?\u003c\/h3\u003e\n\u003cp\u003eYes. The four installed jaws are reversible hard jaws; Sherline soft jaws (aluminium, brass) are sold separately for delicate finished surfaces.\u003c\/p\u003e\n\n\u003ch3\u003eWill it interfere with B-axis rotation?\u003c\/h3\u003e\n\u003cp\u003eWithin the standard Pocket NC trunnion clearance envelope (the chuck height + workpiece must fit under the spindle at full B\/A rotation). For tall workpieces, validate clearance in the simulator at \u003ca href=\"https:\/\/sim.pentamachine.com\" target=\"_blank\" rel=\"noopener\"\u003esim.pentamachine.com\u003c\/a\u003e before cutting.\u003c\/p\u003e\n\n\u003ch3\u003eLead time?\u003c\/h3\u003e\n\u003cp\u003eIn stock at Köln — same-day shipment for orders before 14:00 CET. Sherline manufacturing in California; restock from factory is 2–3 weeks if we're out.\u003c\/p\u003e\n\n\u003ch3\u003eReturns?\u003c\/h3\u003e\n\u003cp\u003e14-day return for private buyers under EU Widerrufsrecht. Commercial returns subject to our AGB. See \u003ca href=\"\/es\/pages\/returns-refunds\"\u003eReturns \u0026amp; Refunds\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003ePair with\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/es\/products\/annual-maintenance-contract\"\u003eAnnual Maintenance Contract\u003c\/a\u003e — keep the machine calibrated for the precision the chuck unlocks\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/es\/pages\/training\"\u003eOwner training course\u003c\/a\u003e — module on workholding strategy\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/es\/pages\/forum\"\u003eForum thread: Fixture and workholding ideas\u003c\/a\u003e — community-curated setups\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Sherline","offers":[{"title":"Default Title","offer_id":53065164980490,"sku":"CYCLE-SHERLINE-4JAW","price":1780.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/7075\/8793\/files\/sherline-4jaw-chuck-mounted_547e4e25-4491-40b3-8a11-badfc6b995bf.png?v=1779122610","url":"https:\/\/cyclecnc.com\/es\/products\/sherline-4-jaw-chuck-pocket-nc","provider":"CycleCNC","version":"1.0","type":"link"}