Transcript
I-SNJ-800A http://www.sunnen.com
IMPORTANT INSTRUCTIONS for SUNNEN SNJ-8-749 PILOTED PORTABLE HONE For Bore Diameters From 1.250 to 1.770 in. (31,8 to 45,0 mm) (For Harley-Davison® Engine Cases)
INTRODUCTION Sunnen SNJ-8-749 Piloted Portable Hone is designed for sizing the main bearing bore in Harley-Davison® Engine Case. Hone is designed to be used in a heavy-duty electric drill motor or drill press with chuck capacity of no less than 5/8 in. (16 mm). Hand-Feed hones are supplied with only one universal joint, which is sufficient if hone is being used in a portable electric drill motor. If hone is used in a drill press, lathe, or other machine with a fixed spindle, a second AN-70 Universal Joint must be substituted in place of AN-26A Drive shaft, refer to Repair Part list on back of this sheet. To ensure cutting action; and to prevent galling and pick-up, a continuous supply of Honing Oil MUST be provided. For best results use only Sunnen Industrial Honing Oil, which has been specially formulated for honing.
ASSEMBLY Stones come in a set of three. Replace all three stones at the same time. Differences in stone height can cause chatter and poor cutting action.
1/2 in. (12,7 mm)
1-1/2 in. (38,1 mm)
1. Shorten stones to 1-1/2 in. (38,1 mm), centered on holder as shown (see Figure 1). 2. Insert stones in slots of Hone Head as shown (see Figure 2). NOTE: Occasionally, a new set of stones cannot be inserted into hone head. If this occurs, loosen three Slotted Head Spring Plungers 1/2 turn in top of hone head; insert new stones; and then retighten plungers (refer to Figure 2).
HONE BORE Hone should be stroked fast enough to produce a crosshatch in the bore. If stroke is too slow, cutting action slows down and stones can glaze and chatter. When starting out, it is best to “short stroke” in tight spots of bore and gradually lengthen stroke as tight spots are honed out. 1. Install Pilot Bearing (not supplied), with tapered roller bearing(Timken Bearing), in engine case as shown (see Figure 3). 2. Slide Piloted Hone into bushing and bore until stones are centered in bore (see Figure 4). 3. Expand Hone by turning Feed Screw clockwise until stones contact bore (refer to Figure 2). TAPERED ROLLER BEARINGS
1/2 in. (12,7 mm)
STONE
PILOT BEARING
FIGURE 1
FIGURE 3
(3) SLOTTED HEAD SPRING PLUNGERS (STONE SLOT ADJUSTMENT)
MAIN BEARING BORE
STONE
HONE HEAD
FEED SCREW
PILOT
FIGURE 2 “SUNNEN AND THE SUNNEN LOGO ARE REGISTERED TRADEMARKS OF SUNNEN PRODUCTS COMPANY.”
BUSHING
STONES
HONE PILOT BEARING
FIGURE 4
PILOT
4. Wiggle Hone and further expand Stones by turning Feed Screw until stones are firmly seated in bore. 5. Direct a continuous stream of honing oil into bore.
(3) SLOTTED HEAD SPRING PLUNGERS (STONE SLOT ADJUSTMENT)
IMPORTANT: DO NOT exceed 350 rpm’s.
STONE
6. Turn ON drill motor, to start hone rotating, and begin stroking Hone back and forth (up and down) over full length of bore. Overstroke both ends of bore equally. 7. Periodically, as bore becomes larger and stones become loose: Stop drill motor, expand stones by turning Feed Screw clockwise, and then resume honing.
HONE HEAD
FEED SCREW
PILOT
SPRING PLUNGER ADJUSTMENT Periodically, three Slotted Head Spring Plungers in top of hone head should be adjusted to allow just enough force to prevent stones from falling out when hone head is removed from bore. Excessive force or “bottoming” of plungers will impede Feed System operation (see Figure 5).
REPAIR PARTS LIST For a complete parts breakdown, see Figure 6.
FIGURE 5 AN-26A DRIVE SHANK
AN-241 DRIVESHAFT
SNJ-35 UNIVERSAL JOINT
SNJ-25 FEED SCREW
TROUBLESHOOTING Refer to the following chart for troubleshooting information. Stone cuts too slowly
Check that you are using the right stone (refer to chart). Check that a continuous supply of Sunnen Industrial Honing Oil is being directed into bore. Stone may be glazed. Dress using Sunnen MAN-700 Dresser. Hone should be rotating in a clockwise direction as viewed form drive shank end of tool. Increase stroke speed. Expand stones firmly against bore.
Chatter
STONE SET GUIDE DIAMETER RANGE (INCHES/MILLIMETERS) 1.250 - 1.437 in. 31,75-36,50 mm
1.418 - 1.604 in. 36,02-40,74 mm
1.580 - 1.770 in. 40,13-45,00 mm
ROUGHING
SNJ1-A45
SNJ2-A45
SNJ3-A45
FINISHING
SNJ1-J63
SNJ2-J63
SNJ3-J63
For assistance, consult your local Sunnen Field Service Engineer or Sunnen Technical Services Dept.
SNJ-16-8-749-NC6X (PILOTED) WEDGE
SNJ-21 UNIVERSAL END
HONE HEAD
FIGURE 6
ACCESSORIES AN-70 UNIVERSAL JOINT Order an additional Universal Joint when using Hone in a drill press, lathe, or other machine with a fixed spindle. Use in place of AN-26A Drive Shank. AN-80 QUICK-COUPLER Provides instant coupling or uncoupling of Hone from drill motor. Installs between AN-241 Drive Shaft and and AN-26A Drive Shank; between SNJ-11 Hone Head and AN-26A Drive Shank on short bores.
“SUNNEN AND THE SUNNEN LOGO ARE REGISTERED TRADEMARKS OF SUNNEN PRODUCTS COMPANY.”
Sunnen® reserves the right to change or revise specifications and product design in connection with any feature of our products contained herein. Such changes do not entitle the buyer to corresponding changes, improvements, additions, or replacements for equipment, supplies or accessories previously sold. Information contained herein is considered to be accurate based on available information at the time of printing. Should any discrepancy of information arise, Sunnen recommends that user verify discrepancy with Sunnen before proceeding. PRINTED IN U.S.A.
0206
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