MODEL CR 18DMR Hitachi Power Tools C CORDLESS RECIPROCATING SAW CR 18DMR LIST No.
REMARK: Throughout this TECHNICAL DATA AND SERVICE MANUAL, a symbol(s) is(are) used in the place of company name(s) and model name(s) of our competitor(s).
CONTENTS Page 1. PRODUCT NAME ................................................................................................................................ 1 2. MARKETING OBJECTIVE .................................................................................................................. 1 3. APPLICATIONS ................................................................................................................................... 1 4. SELLING POINTS .........................................
1. PRODUCT NAME Hitachi 18 V Cordless Reciprocating Saw, Model CR 18DMR 2. MARKETING OBJECTIVE The new Model CR 18DMR is the upgraded version of the current Model CR 18DV. The Model CR 18DMR is of the popular DMR-series design and compatible with the new flat battery. The Model CR 18DMR features the carbon brush-replaceable, powerful and long-life motor, Hitahci-original tool-less blade detachable mechanism that is easy to maintain and comfortable soft grip handle for ease of operation.
4-1. Selling Point Descriptions (1) Easy-to-maintain tool-less blade detechable mechanism Recently, most saber saws on the market are equipped with a mechanism that requires no tool such as hexagonal wrench for mounting and removal of saw blades. The Model CR 18DMR is also equipped with such a mechanism in order to replace saw blades speedily.
< Construction of the tool-less blade detachable mechanism > Nut Holder pin to secure the blade Plunger (reciprocating shaft) Saw blade Spring Spring to pull back the holder pin Bolt Heat- and dust-resistant rubber cap Lever to mount and remove saw blades < Maintenance of the tool-less blade detachable mechanism > After use, clean the blade mount with a brush to ensure that the tool-less blade detachable mechanism can function smoothly.
< Disassembly and cleaning of the tool-less blade detachable mechanism > The tool-less blade detachable mechanism can be easily disassembled or reassembled because the fixing bolt can be loosened or tightened without removing the front cover. To disassemble the tool-less blade detachable mechanism, remove the fixing bolt and pull out the blade holder. CAUTION: This is a special bolt comprised of an M4 thread and an M5 hexagonal socket. Be careful not to break the bolt by overtightening.
(3) Replaceable carbon brush to elongate motor life The carbon brush can be replaced from the outside of the motor to elongate the motor life and to enhance the maintainability. The carbon brush can be easily removed from the motor with a flat-blade screwdriver as shown in Fig. 2, and can also be easily and securely mounted to the motor by hooking the nail of the carbon brush on the contact portion outside the brush tube.
5. SPECIFICATIONS 5-1. Specifications Capacity Max. cutting size Number of stroke 0 --- 2,100/min. Stroke 28 mm (1-1/8") Type of motor DC magnet motor Enclosure Housing Front cover Gear cover and upper cover Storage battery Charger Steel pipe outer diameter Wood thickness Mild steel plate (thickness) 90 mm (3-1/2") 90 mm (3-1/2") 10 mm (3/8") Max.
Standard accessories (BLFK) (HLFK) Charger (UC 24YFA) Battery (EB 1820L/EB 1830HL) Blade (No.
(2) BI-METAL blades The blade numbers of BI-METAL blades in Table 2 are engraved in the vicinity of the mounting position of each blade. Select appropriate blades by referring to Table 2 and 3 below. Table 2: BI-METAL blades Blade No. Uses Thickness (mm) No. 101 For cutting steel and stainless pipes less than 60 mm (2-3/8") in outer diameter 2.5 --- 6 (3/32" --- 1/4") No. 102 For cutting steel and stainless pipes less than 100 mm (4") in outer diameter No.
--- 9 --- 6-1. Specification Comparisons (18 V cordless reciprocating saw) 6.
6-2. Working Performance per Single Charge (reference only) < Cutting steel pipes > Steel pipe 40 A (outer diameter: 48.6 mm (1.91") thickness: 3.5 mm (0.14")) HITACHI genuine blade No. 103 for cutting steel pipes Pressing force about 5 kgf (11 lbs.) Fig. 4 < Cutting wood > Lumber: SPF 2 x 10 (38 mm (1.50") in thickness and 235 mm (9.25") in width) Width HITACHI genuine blade No. 121 for cutting wood Thickness Pressing force about 5 kgf (11 lbs.) Fig.
--- 11 --- R W B M R W B M such as the pressing force, type of blades, materials, etc.
7. PRECAUTIONS IN SALES PROMOTION 7-1. Safety Instructions In the interest of promoting the safest and most efficient use of the Model CR 18DMR by all our customers, it is very important that at the time of sale, the salesperson carefully ensures that the buyer seriously recognizes the importance of the contents of the Handling Instructions, and fully understands the meaning of the precautions listed on the Caution Plate and Name Plate attached to each tool. A.
(9) Disposal of the Model EB 1820L, EB 1826HL or EB 1830HL storage battery Ensure that all customers understand that Model EB 1820L, EB 1826HL or EB 1830HL Storage Battery should be returned to the Hitachi power tool sales outlet or authorized service center when they are no longer capable of being recharged or repaired. If thrown into a fire, the batteries may explode, or if discarded indiscriminately, leakage of the cadmium compound contained in the battery may cause environmental pollution. B.
7-2. Inherent Drawbacks of Cordless Reciprocating Saw Requiring Particular Attention During Sales Promotion The cordless reciprocating saw offers many advantages; it can be used in places where no power source is available, the absence of a cord allows easy use, etc. However, any cordless tool has certain inherent drawbacks. Salespersons must be thoroughly familiar with these drawbacks in order to properly advise the customer in the most efficient use of the tool. A.
7-3. Front Cover WARNING: The Model CR 18DMR is equipped with the front cover to protect the operator against possible electric shock, and it is not intended for cutting live lines. The front cover covers both the gear cover and the upper cover to protect the operator against electric shock in the event that a live line is accidentally cut and electricity flows from the blade to the metallic enclosure.
(6) Removal of the Gear [37] from the Gear Cover Ass'y [27] Remove the three Seal Lock Flat Hd. Screws M4 x 12 [20] through the hole of the Balance Weight [36]. Then the Gear [37] (together with the Balance Weight [36], Spindle [23] and others) can be removed from the Gear Cover Ass'y [27]. (7) Removal of the Gear [37] from the Spindle [23] Hold at the width-across-flat portions of the Spindle [23] with a vise and remove the Nylock Hex. Socket Flat Hd. Bolt M6 x 16 [29].
8-1-2. Reassembly Reassembly can be accomplished by following the disassembly procedures in reverse. However, special attention should be given to the following items. (1) Mounting the saw blade mount (Figs. 8, 9 and 10) Insert Spring (B) [15] and Holder Pin (B) [14] into the Plunger [3]. Apply Shell ALVANIA RL3 grease to the slanted portion of Lever (A) [12]. Mount the shorter end of Spring (D) [13] into Lever (A) [12] then mount Lever (A) [12] into Blade Holder (A) [1].
(2) Reinstallation of the spindle and gear section to the Gear Cover Ass'y [27] Insert the Spindle [23] into the Ball Bearing 6901ZZCMPS2L [22], Bearing Cover (B) [21], Gear [37] and Balance Weight [36] in order. Secure the spindle and gear section secured with the Nylock Hex. Socket Flat Hd. Bolt M6 x 16 [29] to the Gear Cover Ass'y [27] with the three Seal Lock Flat Hd.
(9) Tightening torques Tapping Screw (W/Flange) D4 x 20 (Black) [55] ............................................. 2.0 0.5 N•m (20 5 kgf•cm) Tapping Screw (W/Sp. Washer) D5 x 30 [26] .................................................. 2.9 0.5 N•m (30 5 kgf•cm) Machine Screw (W/Washers) M3 x 12 [57] ..................................................... 0.5 to 0.8 N•m (5 to 8 kgf•cm) Machine Screws (W/Sp. Washer) M4 x 12 [17] .............................................. 1.8 0.
8-1-3. Wiring diagram Be sure to perform wiring connections as indicated in Figs. 12, 13, 14 and 15. Fig. 11 Internal wire (Red) Fig. 12 Fig. 13 Wiring diagram Fig.
9. STANDARD REPAIR TIME (UNIT) SCHEDULES MODEL Variable Fixed 10 20 30 Work Flow CR 18DMR DC-Speed Control Switch Terminal Piece Set Housing (A).
Hitachi Power Tools LIST NO.
PARTS ITEM NO. 1 * CR 18DMR CODE NO. NO. USED DESCRIPTION 321-132 BLADE HOLDER (A) 1 2 322-709 NUT M4 (BLACK) 1 3 324-472 PLUNGER 1 4 996-401 PACKING WASHER 1 5 996-400 FELT PACKING 1 6 996-407 O-RING (1AP-12) 1 7 956-589 METAL 2 8 324-471 UPPER COVER 1 9 305-574 HEX. SOCKET HD. BOLT (W/SP.
PARTS ITEM NO. 52 53 CR 18DMR CODE NO. NO. USED DESCRIPTION 319-760 PUSHING BUTTON 1 319-861 DC-SPEED CONTROL SWITCH 1 NAME PLATE 1 54 55 302-086 TAPPING SCREW (W/FLANGE) D4X20 (BLACK) 8 56 319-812 HEAT SINK 1 57 993-963 MACHINE SCREW (W/WASHERS) M3X12 1 * 58 322-880 BATTERY EB 1820L (W/ENGLISH N.P.) 2 * 58 322-878 BATTERY EB 1826HL (W/ENGLISH N.P.) 2 * 58 322-877 BATTERY EB 1830HL (W/ENGLISH N.P.) 2 * 58 322-876 BATTERY EB 1830HL (W/ENGLISH N.P.
CR 18DMR STANDARD ACCESSORIES ITEM NO. 501 * 502 CODE NO. DESCRIPTION NO. USED 318-613 SABER SAW BLADES NO. 103 150L P. 14 (5 PCS.) 1 318-621 SABER SAW BLADES NO. 132 203L (5 PCS.) 1 FOR USA 503 944-458 HEX. BAR WRENCH 4MM 1 504 324-313 CASE 1 CHARGER (MODEL UC 24YFA) 1 505 REMARKS OPTIONAL ACCESSORIES ITEM NO. 601 CODE NO. NO. USED DESCRIPTION 959-610 SABER SAW BLADES NO. 1 (5 PCS.) 1 602 958-182 SABER SAW BLADES NO. 2 (5 PCS.) 1 603 958-183 SABER SAW BLADES NO.
