This .pdf document is bookmarked Operation and Maintenance Instructions Geared Head Bench Lathe Model GHB-1236 JET 427 New Sanford Road LaVergne, Tennessee 37086 Ph.: 800-274-6848 www.jettools.com Part No.
14. Make the workshop child proof. Use padlocks, master switches, and remove starter keys. 1.0 IMPORTANT SAFETY INSTRUCTIONS 15. Wear proper apparel. Loose clothing, gloves, neckties, rings, bracelets, or other jewelry may get caught in moving parts. Non-slip footwear is recommended. Wear protective hair covering to contain long hair. Do not wear any type of glove. Read and understand the entire owner's manual before attempting set-up or operation of this lathe. 16. Always use safety glasses.
3. Remove loose items and unnecessary work pieces from the area before starting the machine. WARNING: Some dust, fumes and gases created by power sanding, sawing, grinding, drilling, welding and other construction activities contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
3.0 Table of contents Section Page 1.0 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 2 2.0 About this manual .......................................................................................................................................... 3 3.0 Table of contents ............................................................................................................................................ 4 4.
13.8.1 Change Gears – Exploded View ......................................................................................................... 38 13.8.2 Change Gears – Parts List .................................................................................................................. 38 13.9.1 Feed Rod Assembly – Exploded View ................................................................................................ 39 13.9.2 Feed Rod Assembly – Parts List .....................................
4.
Tailstock Tailstock spindle travel Diameter of tailstock spindle Taper in tailstock spindle Main materials Headstock Bed Apron/Saddle Tailstock Splash guard Stand Dimensions Bed width Overall dimensions, L x W x H Shipping dimensions, L x W x H Weights Net weight, approx. Shipping weight, approx. 3-1/2 in. (89 mm) 1-1/4 in. (31.8 mm) MT3 Cast iron Cast iron Cast iron Cast iron Steel Steel 7-1/8 in. (181 mm) 66-3/16 x 29-1/2 x 57-1/2 in. (1681 x 749.3 x 1460.5 mm) 66-1/2 x 29-9/16 x 57-1/8 in.
5.0 Setup and assembly 5.1 Shipping contents See Figure 5-1.
loosen mounting bolts, shim, and retighten mounting bolts. The lathe must be level to be accurate. 5.2 Uncrating and cleanup Machine is heavy. Use an appropriate lifting device and use extreme caution when moving the machine to its final location. Failure to comply may cause serious injury. 1. Finish removing wooden crate from around lathe. 2. Unbolt lathe from shipping crate bottom. 3.
5.4 Chuck guard installation Install chuck guard to headstock, if it is not already mounted. (See parts breakdown if clarification is needed for assembly.) 6.0 Lubrication Lathe must be serviced at all lubrication points and all reservoirs filled to operating level before lathe is placed into service. Failure to comply may cause serious damage to lathe. 1. Headstock – Oil must be up to indicator mark in oil sight glass (A, Figure 6-1). Top off with Mobil DTE Oil Heavy Medium.
7. Compound Rest – Lubricate three ball oilers (F, Figure 6-4) once daily with Mobil DTE Oil Heavy Medium. 8. Cross Slide – Lubricate four ball oilers (G, Figure 6-4) once daily with Mobil DTE Oil Heavy Medium. 9. Longitudinal Feed Handwheel – Lubricate ball oiler (H, Figure 6-4) once daily with Mobil DTE Oil Heavy Medium. 7.0 Electrical connections All electrical connections must be done by a qualified electrician in compliance with all local codes and ordinances.
This tool is intended for use on a circuit that has an outlet that looks like the one illustrated in Figure 71. The tool is intended for use with a grounding plug that looks like the plug illustrated in Figure 71. Make sure the tool is connected to an outlet having the same configuration as the plug. No adapter is available or should be used with this tool.
The sliding fingers are set similar to the steady rest, free of play, but not binding. The sliding fingers require continuous lubrication at the contact points with the workpiece to prevent premature wear. 9.0 Controls Figure 8-2 8.5 Apron The apron (A, Figure 8-2) is mounted to the carriage. In the apron a half nut is fitted. The half nut gibs can be adjusted from the outside. The half nut is engaged by use of a lever.
6. Speed Selector Levers (F, Figure 9-1) – Use to select spindle speeds in ranges. lock. Turn counterclockwise and loosen to unlock. 7. Feed Direction Selector (G, Figure 9-1) – Selects carriage travel direction when chuck is rotating in forward direction (or counterclockwise as viewed from front of chuck). Carriage lock screw must be unlocked before engaging automatic feeds or damage to lathe may occur. 8. Feed Rate Selector (H, Figure 9-1) – Use knobs to set desired feed, or lead rates. 9.
feeds and threads under normal circumstances. The additional gears found in the toolbox are used for some metric threads and feeds. 1. Disconnect machine from power source. 2. Open the cover on left end of headstock. 3. Loosen hex nuts (E/F, Figure 10-2). Move quadrant out of the way. 4. Change gears (G, Figure 10-2) to match feed and thread chart. 5. Thoroughly clean and install new gears. 6. Move quadrant so the large gear meshes with the smaller gears, and tighten to secure in place.
2. 5. Turn knob (B, Figure 10-4) counterclockwise so the arrow is pointing up to start the feed rod rotating. Move the carriage again and adjust if necessary. Note: Over-adjustment will cause excessive, premature wear of gibs. Figure 11-1 Figure 10-4 11.2 Cross slide adjustment 10.5 Powered carriage travel If the cross slide is too loose, follow procedure below to tighten: Push lever (C, Figure 10-3) down to engage cross feed. Pull lever up to engage longitudinal feed. 1.
7. 11.5 Half nut gib adjustment 1. Remove thread dial assembly by unscrewing the screw (D, Figure 11-2). 2. Loosen three hex nuts (E, Figure 11-2) found on side of apron, and turn three set screws (F, Figure 11-2) equally with a hex wrench. 3. Adjust properly for wear and play. Hold socket set screw firmly with a hex wrench and tighten hex nut to lock in place. Note: Overadjustment will cause excessive, premature wear on gib and mating parts.
12.
13.0 Replacement parts Replacement parts are listed on the following pages. To order parts or reach our service department, call 1800-274-6848 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. Non-proprietary parts, such as fasteners, can be found at local hardware stores, or may be ordered from JET.
13.2.
13.2.2 Headstock Assembly – Parts List Index No. Part No. Description Size Qty 201 ............ GHB1236-201 ........... Pulley ....................................................................... 155x42 .......................... 1 202 ............ F006057 .................... C-Retaining Ring, Ext .............................................. 60mm ............................ 2 203 ............ MFC1000-35 ............. Key, Double Rd Hd .................................................. A5×12MM ...
Index No. Part No. Description Size Qty 256 ............ F006081 .................... C-Retaining Ring, Ext .............................................. 36MM ............................ 1 257 ............ F006056 .................... C-Retaining Ring, Ext .............................................. 45MM ............................ 1 258 ............ F006077 .................... C-Retaining Ring, Int ............................................... 42MM ............................ 1 259 ..........
13.3.
13.3.2 Gearbox Assembly – Parts List Index No. Part No. Description Size Qty 301 ............ GHB1236-301 ........... Cover ....................................................................... ...................................... 1 302 ............ GHB1236-302 ........... Oil Seal .................................................................... ...................................... 1 303 ............ GHB1236-303 ........... Shaft ................................................................
Index No. Part No. Description Size Qty 360 ............ GHB1236-360 ........... Cover ....................................................................... ...................................... 2 361 ............ GHB1236-361 ........... Gear Rack ............................................................... ...................................... 1 363 ............ GHB1236-363 ........... Boss ......................................................................... ................................
13.4.
13.4.2 Apron Assembly – Parts List Index No. Part No. Description Size Qty 401 ............ GHB1236-401 ........... Apron Casting .......................................................... ...................................... 1 402 ............ TS-1490051 .............. Hex Cap Screw ........................................................ M8X30 .......................... 2 403 ............ TS-1550061 .............. Flat Washer ............................................................. M8 .........
Index No. Part No. Description Size Qty 461 ............ GHB1236-461 ........... Cap .......................................................................... ...................................... 1 462 ............ GHB1236-462 ........... Shaft ........................................................................ ...................................... 1 463 ............ BDB919-021.............. Ball Oiler .................................................................. 6MM ......................
13.5.
13.5.2 Cross Slide Assembly – Parts List Index No. Part No. Description Size Qty 501 ............ GHB1236-501 ........... Saddle ..................................................................... ...................................... 1 502 ............ TS-1533042 .............. Phillips Pan Hd Mach Screw ................................... M5X12 .......................... 8 503 ............ GHB1236-503 ........... Wiper ....................................................................... ........
13.6.
13.6.2 Compound Rest Assembly – Parts List Index No. Part No. Description Size Qty 601 ............ GHB1236-601 ........... Flange Nut ............................................................... M16 ............................... 1 602 ............ GHB1236-602 ........... Handle ..................................................................... ...................................... 1 603 ............ GHB1236-603 ........... Lever .................................................................
626 ............ GHB1236-626 ........... Bolt .......................................................................... ...................................... 1 627 ............ GHB1236-627 ........... Hex Socket Hd Cap Screw ...................................... M6×25 ........................... 2 628 ............ GHB1236-628 ........... Bearing Housing ...................................................... ...................................... 1 629 ............ GHB1236-629 ........... Long Handle ....
13.7.
13.7.2 Tailstock Assembly – Parts List Index No. Part No. Description Size Qty 701 ............ GHB1236-701 ........... Handle ..................................................................... ...................................... 1 702 ............ GHB1236-702 ........... Handle Screw .......................................................... ...................................... 1 703 ............ TS-1540071 .............. Hex Nut .................................................................
13.8.1 Change Gears – Exploded View 13.8.2 Change Gears – Parts List Index No. Part No. Description Size Qty 801 ............ GHB1236-801 ........... Hex Socket Hd Cap Screw ...................................... M6X12 .......................... 2 802 ............ GHB1236-389 ........... Flat Washer, Large .................................................. M6 ................................. 2 803 ............ GHB1236-803 ........... Gear ...............................................................
13.9.
13.9.2 Feed Rod Assembly – Parts List Index No. Part No. Description Size Qty 901 ............ GHB1236-901 ........... Lead Screw .............................................................. ...................................... 1 902 ............ GHB1236-902 ........... Rod .......................................................................... ...................................... 1 903 ............ GHB1236-903 ........... Bracket ................................................................
13.10.
13.10.2 Motor and Change Gear Enclosure – Parts List Index No. Part No. Description Size Qty 1001 .......... GHB1236-1001 ......... Change Gear Enclosure .......................................... ...................................... 1 1002 .......... GHB1236-1002 ......... Door ......................................................................... ...................................... 1 1003 .......... GHB1236-1003 ......... Motor Lower Cover .................................................. ...
13.11.
13.11.2 Stand/Brake/Coolant Pump – Parts List Index No. Part No. Description Size Qty 1101 .......... GHB1236-1101 ......... Splash Guard ........................................................... ...................................... 1 1102 .......... TS-1550041 .............. Flat Washer ............................................................. M6 ............................... 16 1103 .......... TS-1503021 .............. Hex Socket Hd Cap Screw ...................................... M6X10 ....
13.12.
13.12.2 Electrical Box Assembly – Parts List Index No. Part No. Description Size Qty 1201 .......... GHB1236-1201 ......... Circuit Breaker ......................................................... DZ47-63 -1PC3 ............. 1 1202 .......... GHB1236-1202 ......... Circuit Breaker ......................................................... DZ47-63-2PD16 ............ 1 1203 .......... GHB1236-1203 ......... Transformer ............................................................. JBK5-100VA-TH ...........
13.13.
13.13.2 Steady Rest and Follow Rest – Parts List Index No. Part No. Description Size Qty 1301 .......... GHB1236-1301 ......... Pinned Knob ............................................................ ...................................... 3 1302 .......... B-56........................... Roll Pin .................................................................... 3X20MM ....................... 3 1303 .......... GHB1236-1303 ......... Collar .............................................................
13.14.1 Chuck and Leadscrew Guards – Exploded View 13.14.2 Chuck and Leadscrew Guards – Parts List Index No. Part No. Description Size Qty 1501 .......... TS-1540041 .............. Hex Nut .................................................................... M6 ................................. 1 1502 .......... F010438 .................... Socket Set Screw DP .............................................. M6 ×16 .......................... 1 1503 .......... GHB1236-1503 ......... Switch Box ............
13.15.
13.15.2 Accessories – Parts List Index No. Part No. Description Size Qty 1701 .......... GHB1236-1701 ......... 3-Jaw Chuck Assembly ........................................... 160MM-D4 .................... 1 1701-1 ....... TS-1503031 .............. Hex Socket Hd Cap Screw ...................................... M6X12 .......................... 3 1701-2 ....... GHB1236-1701-2 ...... Camlock Stud .......................................................... ...................................... 3 1701-3 ...
14.
15.0 Warranty and service JET warrants every product it sells against manufacturers’ defects. If one of our tools needs service or repair, please contact Technical Service by calling 1-800-274-6846, 8AM to 5PM CST, Monday through Friday. Warranty Period The general warranty lasts for the time period specified in the literature included with your product or on the official JET branded website. JET products carry a limited warranty which varies in duration based upon the product.
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427 New Sanford Road LaVergne, Tennessee 37086 Phone: 800-274-6848 www.jettools.
