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- Page 1 Operating Instructions and Parts Manual Step Pulley Turret Mill Model JTM-1, JTM-2 Model JTM-1 shown 427 New Sanford Road LaVergne, Tennessee 37086 Part No. M-690082 Ph.: 800-274-6848 Revision H 01/2016 www.jettools.com Copyright © 2014 JET...
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Page 2: Warranty And Service
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 ®... -
Page 3: Table Of Contents
2.0 Table of contents ............................3 3.0 Safety warnings .............................. 4 4.0 About this manual ............................5 5.0 JTM-1, JTM-2 installation layout ........................6 6.0 Specifications ..............................7 7.0 JTM-1/JTM-2 Features and Terminology ....................... 8 8.0 Setup and Assembly ............................9 8.1 Unpacking .............................. -
Page 4: Safety Warnings
19. Disengage power feed when not in use. Do not use this turret mill for other than its intended use. If used for other purposes, JET, 20. Remove adjusting keys and wrenches. Form a disclaims any real or implied warranty and... -
Page 5: About This Manual
If there are questions or comments, please contact your local supplier or JET. JET can also be reached at our web site: www.jettools.com. -
Page 6: Jtm-1, Jtm-2 Installation Layout
5.0 JTM-1, JTM-2 installation layout Figure 1... -
Page 7: Specifications
Shipping Weight (approx) ................2200 lb ..........2200 lb 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. -
Page 8: Jtm-1/Jtm-2 Features And Terminology
7.0 JTM-1/JTM-2 Features and Terminology Figure 2: Features and Terminology (JTM-1 shown) Table longitudinal crank handle (x2) Power connection box 10. Base 11. Filter screen (x2) (for use with optional flood coolant systems) 12. Elevating leadscrew 13. Crossfeed handle 14. Knee crank handle 15. -
Page 9: Setup And Assembly
8.2 Contents of shipping container 8.0 Setup and Assembly Note: Some parts may be pre-installed on the mill. Turret Mill (not shown) 8.1 Unpacking Flat Way Cover Pleated Way Cover Open shipping container and check for shipping Draw Bar damage. Report any damage immediately to your Table Adjustment Handles distributor and shipping agent. -
Page 10: Site Preparation
cause the column to twist and put a bind in the 8.3 Site preparation ways. The mill must be placed on an even surface and 8.5 Completing assembly bolted to the floor. Anchor bolts of sufficient size and length must be fastened to the floor according to the mill’s footprint. -
Page 11: Lubrication
Confirm that power at the site matches power requirements of the mill before connecting to power source. The JTM-1 turret mill is rated at 2HP, 3PH, 230V only. The JTM-2 turret mill is rated at 2HP, 1PH, 115/230V and comes from the factory prewired at 230V. - Page 12 Manual Fine Feed Handwheel (J, Figure 5) – Change speed range only Feed reversing knob (K, Figure 5) must be in when motor is NOT running. neutral position. The feed trip lever (I, Figure 5) must be engaged. Note: Manual feed C.
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Page 13: Operations
11.0 Operations 11.1 Operating precautions Observe following instructions before using this mill. Verify that spindle brake is released before starting motor. Rotate spindle by hand to facilitate meshing of clutch and gears. Do not use quill power feed at speeds above 2700 RPM. -
Page 14: Setting Up For Automatic Feed
Position feed reversing knob (K) in the center Set Feed Rate Lever (M) to the feed rate at neutral position. required for the tooling and material used. Engage feed trip lever (I) by pulling away from 10. Place Quill Feed Engagement Lever (E) in the head assembly. -
Page 15: Draw Bar Operation; Changing Tooling
11.7 Draw bar operation; changing tooling The drawbar has 7/16”-20 right hand threads and should be tightened with normal pressure using provided wrench. To remove a tool: Lock spindle by turning spindle brake (C, Figure 8) left or right. Use provided wrench to loosen draw bar two or three turns (counterclockwise). -
Page 16: Head Movement: Fore And Aft
12.3 Positioning ram 12.2 Head movement: Fore and aft 12.3.1 Sliding ram fore and aft Setting the angle: Loosen two bolts (A, Figure 11) that lock ram a. Loosen the three ram adapter locking bolts to its ways. (A, Figure 10). It is unnecessary to loosen the bolts more than one-half (1/2) turn to allow tilting. -
Page 17: Gib Adjustment
12.5.3 Table gib Loosen table locking handles. The table gib adjustment screw (C, Figure 13) is on the left-hand side, beneath table. Tighten screw until slight drag is felt when turning longitudinal table cranks. 12.6 Table lead screw backlash adjustment Refer to Figure 14. - Page 18 Tighten the two nut locking screws. Using one of the longitudinal table cranks, move table to middle position. Set up a dial indicator to check longitudinal backlash. Gently move crank back and forth while watching dial indicator. The backlash should be between 0.003 inch and 0.005 inch. If necessary, repeat the above steps to set backlash.
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Page 19: Maintenance
13.0 Maintenance Before any intervention on machine, disconnect it from electrical supply by pulling out plug or switching off main switch! Failure to comply may cause serious injury. 13.1 Lubrication The milling machine is equipped with a “one-shot” lubrication system. The system lubricates the lead screws and ways. -
Page 20: Belt Position - Speed Ranges
14.0 Belt position – speed ranges Figure 15: Belt position 15.0 Replacement Parts Replacement parts are listed on the following pages. To order parts or reach our service department, call 1- 800-274-6848 Monday through Friday, 8:00 a.m. to 5:00 p.m. CST. Having the Model Number and Serial Number of your machine available when you call will allow us to serve you quickly and accurately. -
Page 21: Upper Head Assembly - Exploded View
15.1.1 Upper Head Assembly – Exploded View... -
Page 22: Upper Head Assembly - Parts List
35 ....LA-038 ....... Brake Lock Pin....................1 36 ....TS-0680061 ....Washer ..............1/2" ........ 1 37 ....JTM1-037 ....Spindle Speed Plate (JTM-1) ................ 1 ....JTM1-037A ....Spindle Speed Plate (JTM-2) ................ 1 39 ....JTM1-039A ....Belt Guard...................... 2 41 .... - Page 23 Index No Part No Description Size 73 ....JTM1-C73 ....Lock Washer ....................1 74 ....LA-059 ....... Bearing Lock Nut ................... 1 75 ....JTM1-C75 ....Hardened Nut ............7/16” ......1 76 ....LA-045 ....... T-Bolt ......................3 77 ....
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Page 24: Head Assembly - Exploded View
15.2.1 Head Assembly – Exploded View... -
Page 25: Head Assembly - Parts List
15.2.2 Head Assembly – Parts List Index No Part No Description Size ....LA-166A ....Worm Gear Cradle Assembly (includes #1-17,36,37,40) ....... 1 1 ....TS-1533042 ....Screw ............... M5x10 ......6 2 ....HA-002 ...... Bevel Pinion Washer ..................1 3 .... - Page 26 Index No Part No Description Size 80 ....LA-084 ....... Overload Clutch ..................... 1 81 ....LA-085 ....... Overload Clutch Sleeve ................. 1 82 ....LA-090 ....... Key......................... 1 83 ....TS-1532052 ....Pan Head Machine Screw ........M4x16 ......3 85 ....
- Page 27 Index No Part No Description Size 157 .... LA-040 ....... Lock Nut......................4 158 .... HA-158 ...... Screw ............... M4x5 ......2 159 .... LA-118 ....... Micrometer Scale ................... 1 161 .... LA-115 ....... Quill Micro-Stop Nut..................1 162 ....
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Page 28: Base Assembly - Exploded View
15.3.1 Base Assembly – Exploded View... -
Page 29: Base Assembly - Parts List
15.3.2 Base Assembly – Parts List Index No Part No Description Size 1 ....LB-001 ....... Hex Socket Cap Screw ..........M6 x30 ......2 2 ....LB-023 ....... Gear ....................... 1 3 ....LB-020G ....Ram Adapter....................1 4 .... - Page 30 ....JTM1-WCF ....Flat Way Cover (not shown) ................1 ....JTM1-WCA ....Pleated Way Cover (not shown) ..............1 ....JTM4VS-TB ....Tool Box Kit Complete (not shown) ............... 1 ....STRIPE-1-3/4 .... JET Stripe ..............1-3/4”W ....per ft.
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Page 31: Table Leadscrew Assembly – Exploded View
15.4.1 Table Leadscrew Assembly – Exploded View 15.4.2 Table Leadscrew Assembly – Parts List Index No Part No Description Size 1 ....TS-0571052 ....Jam Nut ..............1/2-20UNF ....3 2 ....LT-010C ....Handle ......................3 ....LT-010C-CHR ... Chrome Surface Handle ................3 3 .... -
Page 32: One-Shot Lubrication System - Exploded View
15.5.1 One-Shot Lubrication System – Exploded View 15.5.2 One-Shot Lubrication System – Parts List Index No Part No Description Size ....LT-8-A ....... Hand Oiler Assembly (includes #1,1A,4,5,9) ..........1 1 ....LT-8 ......Hand Oiler...................... 1 1A ....LT-8-SG ....Hand Oiler Sight Glass (with gasket) ............. 1 2 .... -
Page 33: Electrical Connections
16.0 Electrical Connections... - Page 34 This page intentionally left blank.
- Page 35 This page intentionally left blank.
- Page 36 427 New Sanford Road LaVergne, Tennessee 37086 Phone: 800-274-6848 www.jettools.com...
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