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HIGH SPEED PRECISION LATHE OPERATOR’S & SPARE PARTS MANUAL 16" & 18" Series For Models : 1640L, 1660L, 1860L, 1880L Sharp Industries, Inc. 3501 Challenger Street Torrance, CA 9050. USA Tel (310) 370-5990, Fax (310) 542-6162...
PREFACE Thank you for choosing Sharp as your choice for a high precision lathe. We at Sharp take pride in the workmanship, durability and precision of our machines. Read this manual in its entirety in order to get the best possible results from the machine and prolong its life, and become familiar with its operation, safety features and recommended maintenance.
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DO NOT modify or alter this equipment in any way. If modifications are necessary, all such requests must be handled by SHARP INDUSTRIES, INC. Any unauthorized modification or alteration of any sharp MACHINES could...
1. SHARP HIGH SPEED PRECISION LATHE 1-1 Machine Assembly...
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ITEM DESCRIPTION ITEM DESCRIPTION Spindle speed shifting lever Carriage clamping lever Spindle speed H/L shifting lever Foundation adjusting bolt Spindle speed shifting selection Spindle operation control rod lever 4 position automatic feed stop Forward/Reverse Shifting lever selection rod Thread/Feed Selection lever Leadscrew Thread/Feed Shifting lever Auto-feed rod...
2. UNPACKING & MACHINE INSTALLATION 2-1 Unpacking When the machine is arrived, first, check if the wooden case is damaged or not, secondly, open the case and inspect the machine for any damage or short supply of parts. If so, please contact our company or insurance company immediately in order to get the best solution or refund;...
2-3 Basic Foundation With the common usage of tungsten carbide cutting tools nowadays, heavy cutting and quicker spindle speed are therefore reinforced. This may cause the vibration easily. In order to keep the best cutting condition it is necessary to build a sound & good floor basis. (Please refer to figure 2-3 for basic structure.) UNIT-mm Fig.2-3...
3. ELECTRICAL CIRCUIT CONTROL 3-1 Electrical Wiring The electrical control box can be found by opening its cover at the back side of bed. Connect the power source wire with the connecting points (R.S.T). The wire between the power source and the connecting points must be over sectional area (5.5 mm for 460 or 18”...
4-2 Transmission & Stop of Spindle After the procedure described previously in this manual have been done, it is time to test the machine. to “L”, the spindle speed shifting Position the spindle H/L shifting lever ○ to “N” selection lever ○ to the very left side, and forward/reverse shifting lever ○...
Caution: Do not shift gears while spindle is turning. Be certain gears are properly engaged before starting. 4-4 Intermittent (Inching) Operation of Spindle For the convenience spindle speed shifting, feeding rate recognition and work piece center line and adjustment, press the intermittent button ○ located on the right side of the gear box, and the spindle will rotate forward.
4-5 The Importance and Methods of Spindle Leveling Adjustment A lathe without proper leveling adjustment is likely to chatter. As a consequence, this will influence the cutting accuracy of work piece and result in poor roundness accuracy and finish. It is necessary to pay attention to the spindle leveling from time to time in order to have the best cutting condition of the lathe.
4-6 Transmission & Stop of Gear Box Open the end cover to find the gear train transmitting from headstock box, position the forward/reverse shifting lever (○ of item 1-1) to right side, the spindle will rotate forward; to right; reverse; to Neutral, stop. Do not change the gears while turning.
4-9 Automatic Feeding Operation 1. Position the thread/reverse shifting lever (○ of item 1-1) for obtaining the required feeding position. 2. Shift the thread, feed selection lever (○ of item 1-1), thread, feed selection lever (○ of item 1-1), 10-step feed selection lever to select the appropriate feeding rate.
4-12 Tailstock Operation 1. The tailstock handwheel dial is divided in 0.002mm per graduation. The tailstock moves forward 5mm per clockwise revolution of handwheel.When revoluting clockwise, the quill will retract and, to the last, the center will release automatically. 2. Push the tailstock quill locking lever ○ forward to fix the tailstock quill.
5. THREADING 5-1 Leadscrew Drive. Move the forward/reverse lever (○ of item 1-1) to the right will cause the leadscrew to rotate backwards, moving the lever to the left the leadscrew will rotate forward and when lever is in neutral the leadscrew will stop. 5-2 Threading After selecting the thread to be cut, set the following levers to the appropriate position: ○...
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Thread dial indicator for Metric leadscrew cutting metric threads. There are two dials, 2&7 division and 3&5 division for Metric leadscrew while using Metric thread dial indicator. Use 3&5 division dial for cutting pitches 1.25, 2.5, 5.0, 2.25, 4.5; for the rest threads use 2&7 division dial. Example 1 : For cutting pitches 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, 4.0, 6.0, use the 14T worm gear and the 2&7 division dial.
6. LUBRICATION 6-1 Headstock Lubrication Headstock lubrication is splash injection type. Oil grooves are equipped around the headstock to provide lubricant flowing from oil grooves to spindle, then finally reach the bottom of the headstock. To add oil, take off the oil plug on the top of the headstock cover, fill to the centerline of oil sight glass.
7. MAINTENANCE & ADJUSTMENT Please refer to following items for machine problem solution and maintenance for obtaining the best function and the long service life of the lathe. 7-1 Headstock 1. To avoid the headstock cover oil leaking: Once the headstock cover is opened, use cloth to clean the connecting surface grease, then can close the cover and tighten the set screw.
7-2 Apron & Saddle 1. Apron lubrication location: on the right top side of the saddle base. The oil inlet is plugged and marked “OIL” is the oil hole. 2. Apron drain hole located on the bottom ○ cover of the apron as show on the right figure, the drain plug marked ○...
7-3 Gear Box 1. Lubrication location: Below the top cover of the apron, take off the top cover to find the oil plug marked “OIL”, the oil inlet hole. 2. Drain hole: On the left bottom side of the 10-step feed selection dial.
7-5 Belt Tension Adjustment After long use, the belt will stretch and require periodic tension adjustment. 1. Take off the cover on the left back side of the lathe. 2. Loosen adjusting nut ○ and lower down the suitable height until the desired belt tension is achieved.
7-7 Brake & Micro Switch Adjustment The foot brake is connected with the micro switch. It should have 0-1 mm end play between the brake arm and the touching, head of the micro switch. The correct brake action should cut off the electricity first, then brake avoid the brake belt being worn out.
8. Taper Attachment Installation Taper of Attachment: STEP1: via hole “A” Install taper attachment on the carriage using screws NO.○ (Don’t tighten too tight using screw M10x40L and flat washer.) STEP2: Disengaged screw NO.○ STEP3: Adjust the position of NO.○ and let are gage point is contacted with NO.206009.
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TROUBLESHOOTING THE “C” MODEL LATHE The objective is to locate and isolate the problem NOISE IN HEADSTOCK/GEARBOX: Note: 85 % of noise normally comes from the output shaft pulley. Run lathe with all controls in neutral to see if the problem is in the spindle. a.
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Check gear at bottom of shaft for tightness & proper fit against the lead screw. Check the half nut for proper fit. Note: All Sharp Lathes are made to cut ASE (Inch) threads. To cut metric threads, make sure the half nuts are engaged at all times, because it is not a metric based machine, and therefore will not repeat according to the threading dials.
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CHATTER/VIBRATION PROBLEMS: Spindle has excessive run out. (Figure 5) Loose Compound, cross feed or saddle. (Figure 6) Loose motor mount or motor not seated properly on base. (Figure 7) Backlash on drive pulley shaft and key. (Figure 2) New rack and old gear. (If machine has been crashed) (Figure 8) Irregular power supply.
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ADJUSTMENTS AND REPAIRS: ADJUSTING LEAD SCREW BACKLASH Remove plastic cover on the lead screw bracket. Loosen lock nut ”A”under cover. Tighten left side nut ”B”until backlash has been removed. Re-tighten lock nut ”A”and replace plastic cover. (Figure 9) ADJUDTING SPINDLE BEARINGS The front and middle spindle bearings are precision taper roller bearings.
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ADJUSTING THE FEED OVERLOAD This machine is equipped with a safety overload which can be adjusted by the set screw (Part # 73) located in the center of cover (Part # 75) which is located in the center of the apron. (To increase tension turn clockwise, to reduce tension turn counterclockwise).
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Figure 5 Figure 6 Loosen bolts a bit when aligning Head. Figure 7 Rack Pinion Figure 2 Figure 8...
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Spindle Bearing Adjust. Oil-in Hole Figure 9 Figure 10 Figure 13 Loosen 3 screws Tighten 3 screws on the side as needed (First take off chasing dial assembly.) Make sure to test the up/down movement of halfnuts/holders before reassembling Figure 17...
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OIL LEAKS Headstock top cover leak: Remove cover, clean all surfaces with a clean rag, apply a small coat of grease on the gasket surface and reinstall the cover. Oil leak around the spindle is most likely caused by the oil level begin too high or oil return hole over the spindle being blocked or restricted.
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APRON REMOVAL Remove dowel pins from lead screw and feed shaft (Figure 4) Remove chasing dial assembly (Figure 15) Remove rotation lever assembly (Figure 15) Remove lead screw bracket and slide lead screw & lead shafts out of apron (Figure 16) Removing 4 bolts will allow the apron to be removed.
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Figure 11 Figure 12 Shear Pins Loosen bolts a bit when Figure 5 Figure 4 aligning Head. Spindle Bearing Adjust. Oil-in Hole Figure 10 Figure 16 Figure 15...
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CONTENTS SYSTEM IN EACH UNIT......................1 HEADSTOCK ..........................2 GEAR BOX ..........................11 APRON ............................16 BED AND BASE ........................21 BRAKE SYSTEM ........................24 CARRIAGE AND CROSSFEED ....................26 TAILSTOCK ..........................31 STEADY .............................33 FOLLOW REST ASSEMBLY ....................35 9.10 COLLANT SYSTEM ASSEMBLY ....................37...
HEADSTOCK ASSMBLY (Spindle Bore:58mm or 2") Model: 19”(480) Amt. Model: 17”(430) Model: 21”(530) Item No. Part Name Used Part No. Part No. Part No. Head stock 3001001-172 3001001-192 3001001-212 Oil plug 3001002 3001002 3001002 Head stock cover 3001003 3001003 3001003 Blanket 3001004 3001004...
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HEADSTOCK ASSMBLY (Spindle Bore:58mm or 2") Model: 19”(480) Model: 19”(480) Model: 19”(480) Amt. Item No. Part Name Used Part No. Part No. Part No. Snap ring , S34 9171S034 9171S034 9171S034 Gear-h 3001047 3001047 3001047 Gear-j 3001048 3001048 3001048 Square key , 8x7x85L Ball bearing , 6205 91301020 91301020...
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HEADSTOCK ASSMBLY (Spindle Bore:58mm or 2") Model: 19”(480) Amt. Model: 17”(430) Model: 21”(530) Item No. Part Name Used Part No. Part No. Part No. Square key , 6x6x18L 91610604 91610604 91610604 Snap ring , S40 9171S040 9171S040 9171S040 Housing 3001088 3001088 3001088 Oil-seal , TC25x47x8L...
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HEADSTOCK ASSMBLY (Spindle Bore:58mm or 2") Model: 19”(480) Amt. Model: 17”(430) Model: 21”(530) Item No. Part Name Used Part No. Part No. Part No. Shaft 3001123 3001123 3001123 Washer 3001124 3001124 3001124 Lever 3001125 3001125 3001125 3001126 3001126 3001126 Set screw, 91120810 91120810 91120810...
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HEADSTOCK ASSMBLY (Spindle Bore:80mm or 3") Model: 19”(480) Amt. Model: 17”(430) Model: 21”(530) Item No. Part Name Used Part No. Part No. Part No. Head stock 3001001-173 3001001-193 3001001-213 Oil plug 3001002 3001002 3001002 Head stock cover 3001003 3001003 3001003 Blanket 3001004 3001004...
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HEADSTOCK ASSMBLY (Spindle Bore:80mm or 3") Model: 19”(480) Model: 19”(480) Model: 19”(480) Amt. Item No. Part Name Used Part No. Part No. Part No. Snap ring , S34 9171S034 9171S034 9171S034 Gear-h 3001047 3001047 3001047 Gear-j 3001048-001 3001048-001 3001048-001 Square key , 8x7x85L Ball bearing , 6205 91301020 91301020...
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HEADSTOCK ASSMBLY (Spindle Bore:80mm or 3") Model: 19”(480) Amt. Model: 17”(430) Model: 21”(530) Item No. Part Name Used Part No. Part No. Part No. Square key , 6x6x18L 91610604 91610604 91610604 Snap ring , S40 9171S040 9171S040 9171S040 Housing 3001088 3001088 3001088 Oil-seal , TC25x47x8L...
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HEADSTOCK ASSMBLY (Spindle Bore:80mm or 3") Model: 19”(480) Amt. Model: 17”(430) Model: 21”(530) Item No. Part Name Used Part No. Part No. Part No. Shaft 3001123 3001123 3001123 Washer 3001124 3001124 3001124 Lever 3001125 3001125 3001125 3001126 3001126 3001126 Set screw, 91120810 91120810 91120810...
BED AND BASE ASSEMBLY Type: 17 Type: 19 Item No. Part Name Amt. Used Part No. Part No. Cover-end 1221600201 1221600201 Screw-cross-recessed head, M6xP1.0x20L Cover-electric box 1122102006 1122102006 Hexagon socket screw , M6xP1.0x25L Pin-taper, 6x36 Rack (5 feet ) 1210701000 1210701000 (6 feet , right) 1220700604...
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BED AND BASE ASSEMBLY Type: 17 Type: 19 Item No. Part Name Amt. Used Part No. Part No. Block-leveling 1003501809 1003501809 Bolt-hexa. head , W1/4"x25 Washer, W5/8" Seat-coolant pump 121010051 121010051 Cover-coolant motor seat 1005000403 1005000403 Nut-lock , W1/4" Base (5 feet) 1210100209 1210100209 (6 feet)