Do not use this turret mill for other than its removing starter keys. intended use. If used for other purposes, JET disclaims any real or implied warranty and holds 18. Give your work undivided attention. Looking itself harmless from any injury that may result around, carrying on a conversation and “horse-...
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27. Remove loose items and unnecessary work WARNING: This product can expose you to pieces from the area before starting the chemicals including lead and cadmium which machine. are known to the State of California to cause 28. All work shall be secured using either clamps or cancer and birth defects or other reproductive a vise to the table.
12.1.1 JTM-1254VS Upper Head Assembly – Exploded View ..............22 12.1.2 JTM-1254VS Upper Head Assembly – Parts List ................23 12.2.1 JTM-1254RVS (R8) Upper Head Assembly – Exploded View ............26 12.2.2 JTM-1254RVS (R8) Upper Head Assembly – Parts List ..............27 ...
The specifications in this manual were current at time of publication, but because of our policy of continuous improvement, JET reserves the right to change specifications at any time and without prior notice, without incurring obligations.
Elevating Crank Handle Read and understand the entire Handwheel contents of this manual before attempting set- Coarse Feed Handle up or operation. Failure to comply may cause Lifting ring serious injury. Electric box key Operator’s Manual 5.0 Set-up and assembly Warranty Card * parts with an asterisk are also included in the tool service...
6.3 Voltage conversion 15. Install table longitudinal and cross-feed cranks on their respective shafts using the nuts on the The JTM-1254VS and JTM-1254RVS have been shafts to secure the cranks. pre-wired for 230 volt operation. To change from 230 to 460 volt operation: 16.
Figure 6-2 (The JTM-1254RVS also allows fore and aft head movement.) The mill head can also be rotated on its Before connecting to power source, make sure that turret.
B – Coolant switch: Turns on and off coolant pump. The spindle direction switch controls a three-phase motor. The motor can be switched from forward to C – Power on button: Turns on power to machine. reverse and back with the motor running, and will reverse direction when the switch setting is D –...
8.4 Spindle brake Do not move Quill Power Feed Lever unless motor is at complete The spindle brake lever (Figure 8-2) is used to stop stop (spindle off – D, Figure 8-1). When changing spindle immediately instead of allowing it to coast to a lever position, do it gently.
8.8 Feed trip cam lever The Feed Trip Cam Lever (A, Figure 8-6) is located behind Manual Fine Feed Handwheel (B). It engages the overload clutch on pinion shaft when positioned to the left. The Feed Trip Cam Lever stays engaged until Quill Stop (G, Figure 8-8) contacts Micrometer Adjusting Nut (F, Figure 8-8) forcing it to drop out automatically, or until it is released manually by pushing lever to the right.
8.14 Fine feed handwheel When the controls are set for the Fine feed using handwheel position (see Table 2), the Fine Feed Handwheel (B, Figure 8-6) can be used for manual fine feed control in either upward or downward direction of quill.
Tighten draw bar firmly using provided wrench. Turn draw bar. The tool is now ready for use. 8.17 Clamping workpiece to table The worktable has 5/8-inch T-slots for clamping workpiece to table. Set motor switch to neutral (stop) position. Place workpiece on table. Clamp workpiece using T-slot clamps, studs, and step blocks as required (Figure 8-11).
9.2.2 Positioning ram on turret Make sure machine base is secured to floor before repositioning ram. The center of gravity can shift enough to cause machine to tip over, resulting in serious injury to operator and damage to machine. Loosen four turret lock bolts (E, Figure 9-3) that clamp the ram to the top of the base.
9.3.3 Table gib adjustment feed lever correctly engages and disengages when driven by drive motor. Table gib adjustment screws (C, Figure 9-4) are beneath table. Tighten screws until slight drag is felt when turning 9.5 Table lead screw backlash longitudinal table cranks. adjustment 9.4 Power feed trip lever mechanism Refer to Figure 9-6.
10.0 User-maintenance Before any intervention on the machine, disconnect it from electrical supply by pulling out plug or switching off main switch. Failure to comply may cause serious injury. 10.1 Lubrication The milling machine is equipped with an automatic lubrication system. The system lubricates lead screws and ways. Oil cups and grease fittings on mill head provide lubrication for spindle bearings and back gear mechanism.
Non-proprietary parts, such as fasteners, can be found at local hardware stores, or may be ordered from JET. Some parts are shown for reference only, and may not be available individually.
12.1.2 JTM-1254VS Upper Head Assembly – Parts List Index No Part No Description Size 1 ....JTM1254VS-A01 ..Upper Pulley Housing ..................1 2 ....JTM1254VS-A02 ..Motor Disc - Upper ..................1 3 ....TS-1523011 ....Set Screw ..............M6x6L ......4 4 ....
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Index No Part No Description Size 61 ....TS-0561072 ....Hex Nut ..............5/8-18UNF ....1 62 ....JTM1254VS-A62 ..Timing Wheel ....................1 63 ....JTM1254VS-A63 ..Timing Belt ..................... 1 64 ....JTM1254VS-A64 ..Bearing Seat ....................1 65 ....
12.3.2 JTM-1254VS Lower Head Assembly – Parts List Index No Part No Description Size 1 ....TS-1503031 ....Hex Socket Cap Screw ..........M6x12L ......1 2 ....TS-1550041 ....Flat Washer ............. Ø6xØ16x2t ....1 3 ....JTM1254VS-B06 ..Worm Gear Spacer ..................1 3A ....
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Index No Part No Description Size 48 ....JTM1254VS-B48 ..Safety Clutch Spring ..................1 49 ....JTM1254VS-B49 ..Overload Clutch Lockout ................1 49-1 ... TS-2276081 ....Set Screw ..............M6x8L ......1 49-2 ... JTM1254VS-B49-2 ..Lock Block ..................... 1 50 ....
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Index No Part No Description Size ....JTM1254VS-B96A ..Spring Cover With Spring Assembly (#96,97) ..........1 97 ....JTM1254VS-B97 ..Adjustable Spring ..................1 98 ....JTM1254VS-B98 ..Quill Pinion Shaft ................... 1 ....JTM1254VS-B98A ..Quill Pinion Shaft Assembly (includes #98,98-2) ........... 1 98-1 ...
12.4.2 JTM-1254RVS (R8) Lower Head Assembly – Parts List Index No Part No Description Size 1 ....TS-1503031 ....Hex Socket Cap Screw ..........M6x12L ......1 2 ....TS-1550041 ....Flat Washer ............. Ø6xØ16x2t ....1 3 ....JTM949EVS-B07 ..Worm Gear Spacer ..................1 3A ....
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Index No Part No Description Size 72 ....JTM949EVS-B72 ..Quill Housing ............105mm ......1 73 ....TS-1502081 ....Hex Socket Cap Screw ..........M5x35 ......2 74 ....JTM949EVS-B74 ..Clutch Ring Pin ....................2 75 ....JTM949EVS-B75 ..Clutch Ring ....................1 76 ....
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Index No Part No Description Size 130 .... JTM949EVS-B130 ..Spring Cover ....................1 131 .... BB-6206ZZ ....Ball Bearing ............. 6206ZZ ......1 132 .... JTM949EVS-B132 ..Hub Sleeve ....................1 133 .... JTM949EVS-B133 ..Nose Piece ....................1 134 ....
12.5.2 JTM-1254VS Base Machine – Parts List Index No Part No Description Size 1 ....JTM1050EVS-C01 ..Lifting Ring ............... M24 ....... 1 2 ....JTM1254VS-C02 ..Ram ....................... 1 3 ....JTM949EVS-C02 ..Worm Gear ....................1 3-1 .....
12.6.2 JTM-1254RVS (R8) Base Machine – Parts List Index No Part No Description Size 1 ....JTM1050EVS2-C29A Lifting Ring ............... M20 ....... 1 2 ....JTM1050EVS2-30 ..Ram ....................... 1 3 ....JTM949EVS-C02 ..Worm Gear ....................1 3-1 .....
12.8.1 JTM-1254VS/RVS Control Box Assembly – Exploded View 12.8.2 JTM-1254VS/RVS Control Box Assembly – Parts List Index No Part No Description Size ....JTM1254VS-CBA ..Control Box Assembly (includes #1~8) ............1 1 ....JTM949EVS-E01 ..Control Box ....................1 2 ....
12.13.1 JTM-1254VS/RVS Lubrication System – Exploded View 12.13.2 JTM-1254VS/RVS Lubrication System – Parts List Index No Part No Description Size 1 ....JTM949EVS-J01N ..Automatic Oiler ............2L, 0~180min ....1 2 ....TS-1503061 ....Hex Socket Cap Screw ..........M6x25L ......2 3 ....
JET sells through distributors only. The specifications listed in JET printed materials and on official JET website are given as general information and are not binding. JET reserves the right to effect at any time, without prior notice, those alterations to parts, fittings, and accessory equipment which they may deem necessary for any reason whatsoever.
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