{"product_id":"jet-690139","title":"JET JTM-4VS Mill w\/3-Axis ACU-RITE 203 DRO (Quill) w\/X \u0026 Y-Axis Powerfeeds \u0026 Power Draw Bar","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eJET JTM-4VS Mill with 3-Axis ACU-RITE 203 DRO (Quill), X \u0026amp; Y-Axis Powerfeeds, and Power Draw Bar\u003c\/strong\u003e is a professional-grade vertical knee mill from JET, engineered for precision metalworking, toolroom operations, and production milling. Built on a Certified Meehanite casting process foundation, this variable speed milling machine delivers consistent, reliable performance with a comprehensive digital readout system, dual-axis powerfeeds, and a pneumatic power draw bar  -  making it one of the most fully equipped mills in the JTM-4VS series lineup.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConstructed using the \u003cstrong\u003eCertified Meehanite casting process\u003c\/strong\u003e for superior rigidity and vibration dampening during heavy cuts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable gibs throughout\u003c\/strong\u003e allow precise tuning of fit and feel across all axes for long-term accuracy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy duty splined motor drive\u003c\/strong\u003e delivers smooth, reliable power transmission across the full variable speed range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal coolant tank built into casting base\u003c\/strong\u003e for use with a coolant system (coolant pump not included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge diameter quill is chromed\u003c\/strong\u003e for improved wear resistance and a smooth, consistent feel during quill operations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne shot lubrication system\u003c\/strong\u003e simplifies routine maintenance and helps protect precision ways and bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision hardened and ground ways and table\u003c\/strong\u003e ensure accurate, repeatable positioning across all three axes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpindle head is internally cooled\u003c\/strong\u003e to maintain optimal operating temperatures during extended machining sessions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision bored and honed milling head\u003c\/strong\u003e ensures quality cuts and minimal runout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-stage power downfeed with automatic stop\u003c\/strong\u003e for controlled, repeatable quill depth operations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eACU-RITE 203 3-Axis DRO (Quill)\u003c\/strong\u003e provides real-time digital position readout for precise, efficient setup and machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eX and Y-Axis powerfeeds\u003c\/strong\u003e reduce operator fatigue and improve feed consistency during longitudinal and cross-travel operations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePneumatic power draw bar\u003c\/strong\u003e speeds up tool changes and reduces wear on the R-8 spindle taper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable spindle speed range of 60�4,200 RPM\u003c\/strong\u003e accommodates a wide variety of materials and tooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance test sheet included\u003c\/strong\u003e confirming factory-verified accuracy at time of manufacture\u003c\/li\u003e\n\u003cli\u003eBacked by the industry-leading \u003cstrong\u003etwo-year full service and parts warranty\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStock Number:\u003c\/strong\u003e 690139\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e JT9-690139\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e JET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle (Type):\u003c\/strong\u003e Variable Speed R8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Axis:\u003c\/strong\u003e 3 (Quill)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor:\u003c\/strong\u003e 3 HP, 230\/460V, 3Ph\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange of Spindle Speeds (RPM):\u003c\/strong\u003e 60 � 4,200\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpindle Taper:\u003c\/strong\u003e R-8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpindle Travel (In.):\u003c\/strong\u003e 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuill Diameter (In.):\u003c\/strong\u003e 3-3\/8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuill Down Feed Rates (IPR):\u003c\/strong\u003e .0015 � .003 � .006\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollet Capacity:\u003c\/strong\u003e 1\/8 � 7\/8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTable Longitudinal Travel (In.):\u003c\/strong\u003e 34\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTable Longitudinal Travel With Powerfeed (In.):\u003c\/strong\u003e 28-3\/4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTable Cross Travel (In.):\u003c\/strong\u003e 12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT-Slot Centers (In.):\u003c\/strong\u003e 2-1\/2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDistance Spindle to Column, Max. (In.):\u003c\/strong\u003e 19\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Distance Spindle to Table (In.):\u003c\/strong\u003e 17-1\/2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePowerfeed:\u003c\/strong\u003e X and Y-Axis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Draw Bar:\u003c\/strong\u003e Pneumatic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Dimensions (L x W x H) (In.):\u003c\/strong\u003e 66 x 63 x 85\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProp 65:\u003c\/strong\u003e Cancer and Reproductive Harm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eJET JTM-4VS Variable Speed Knee Mill\u003c\/li\u003e\n\u003cli\u003eACU-RITE 203 3-Axis DRO (Quill)\u003c\/li\u003e\n\u003cli\u003eX and Y-Axis powerfeeds\u003c\/li\u003e\n\u003cli\u003ePneumatic power draw bar\u003c\/li\u003e\n\u003cli\u003eTolerance test sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the spindle speed range on the JET JTM-4VS, and is it truly variable?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes  -  the JTM-4VS features a continuously variable spindle speed range of 60 to 4,200 RPM, allowing the operator to dial in the ideal cutting speed for a wide variety of materials and tool diameters without stopping to change belt positions.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eDoes the mill come with a coolant pump included?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe JTM-4VS includes an internal coolant tank built directly into the casting base for use with a coolant system; however, the coolant pump itself is not included and must be purchased separately.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat does the ACU-RITE 203 DRO add to this mill, and how many axes does it cover?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe ACU-RITE 203 is a 3-axis digital readout system configured for the quill (Z-axis) as well as the X and Y axes. It provides real-time positional data directly on the display, significantly reducing the need for manual calculations and improving setup speed and repeatability during machining operations.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat spindle taper does the JTM-4VS use, and what is the collet capacity range?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe JTM-4VS uses an R-8 spindle taper, which is the industry-standard taper for Bridgeport-style knee mills. It accepts collets in the range of 1\/8 to 7\/8 inch, providing broad compatibility with end mills, drill chucks, boring heads, and other common R-8 tooling.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003c\/div\u003e","brand":"JET","offers":[{"title":"Default Title","offer_id":40249080873121,"sku":"JT9-690139","price":23521.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0398\/5188\/4705\/products\/690139_main_c3e6c5e7-df42-4836-bbd0-d48cbc0bee25.jpg?v=1624988813","url":"https:\/\/factorydirectsupply.com\/products\/jet-690139","provider":"FactoryDirectSupply.com","version":"1.0","type":"link"}