MODELS DV 18DMR DV 14DMR Hitachi Power Tools CORDLESS IMPACT DRIVER DRILL DV 18DMR DV 14DMR LIST Nos. DV 18DMR: E485 DV 14DMR: E486 D TECHNICAL DATA AND SERVICE MANUAL Mar.
REMARK: Throughout this TECHNICAL DATA AND SERVICE MANUAL, symbols are used in the place of company names and model names of our competitors.
CONTENTS Page 1. PRODUCT NAME ................................................................................................................................ 1 2. MARKETING OBJECTIVE .................................................................................................................. 1 3. APPLICATIONS ................................................................................................................................... 1 4. SELLING POINTS .........................................
1. PRODUCT NAME Hitachi 18 V Cordless Impact Driver Drill/Cordless Hammer Drill, Model DV 18DMR Hitachi 14.4 V Cordless Impact Driver Drill/Cordless Hammer Drill, Model DV 14DMR 2. MARKETING OBJECTIVE The Models DV 18DMR and DV 14DMR are the excellent top-end cordless driver drills developed to reinforce our 18-V and 14.4-V product lines and also to meet the market demands. While the Model DV 18DMR is compact and lightweight (entire length 253 mm, weight 2.
4. SELLING POINTS No. 1 torque: Max. torque 62 N•m (DV 18DMR) 52 N•m (DV 14DMR) No.
4-1. Selling Point Descriptions 4-1-1. Compact and high power: Max. torque 62 N•m (DV 18DMR) While the Model DV 18DMR is compact and lightweight (entire length 253 mm, weight 2.7 kg), it provides the class-top maximum torque 62 N•m thanks to the optimum design (see Tables 1 and 2). The Models DV 18DMR and DV 14DMR can drill large diameter holes and tighten screws effortlessly. Table 1 Model DV 18DMR DV 18DV P E Q B C Max.
4-1-3. 22-position torque adjustable clutch The 22-stage clutch ensures fine torque adjustment (see Table 3). The tightening torque is selectable up to 7 N•m. The wider torque selectable range extends the range of applicable works. Table 3 Clutch cap position 1 4 10 13 19 22 1.5 2.3 3.8 4.6 6.2 7 Tightening torque 0.5 N•m {15 5 kgf•cm} 0.6 N•m {23 6 kgf•cm} 0.7 N•m {38 7 kgf•cm} 0.8 N•m {46 8 kgf•cm} 0.9 N•m {62 9 kgf•cm} 1.
4-1-7. Externally replaceable carbon brushes and separate-type motor The carbon brushes are replaceable from the outside. In addition, the armature is singly replaceable through the adoption of the separate-type motor that is the same as a driver drill with a power cord. Thus the Models DV 18DMR and DV 14DMR are easier to maintain. Carbon brush Armature Magnet Case-type motor (carbon brushes are built in) [Conventional model] Separate-type motor [Models DV 18DMR and DV 14DMR] 4-1-8.
5. SPECIFICATIONS 5-1. Model DV 18DMR Capacity Screwdriver Machine screw 6 mm (1/4") Wood screw 8 dia. x 100 mm (#20 x 4") Drill Brick 16 mm (5/8") [Depth 30 mm (1-1/4")] Metal Mild steel 13 mm (1/2") [Thickness 1.6 mm (1/16")] Aluminum 13 mm (1/2") [Thickness 1.6 mm (1/16")] Wood 50 mm (2") [Thickness 18 mm (11/16")] Keyless chuck Mount type Screw-on (UNF 1/2" --- 20) (13VLRL-N) Diameter 1.5 --- 13 mm (1/16" --- 1/2") Rotation speed (No-load) Low: 0 --- 400/min, High: 0 --- 1,800/min Slip torque 1.
Charger (Model UC 24YJ) Overcharge protection system: (1) Battery voltage detection ( 2V system) for Ni-Cd battery Ni-MH battery temperature detection (dT/dt system) for Ni-MH battery (2) Battery surface temperature detection (thermostat or thermistor) (3) 120 minutes timer Power input: 200 W Charging time: 28 minutes [for type EB 1830HL battery at 20ûC (68ûF)] Operable ambient temperature range: 0 ûC --- 40ûC (32ûF --- 104ûF) The maximum allowable temperature of the type EB 1830HL battery is 50ûC (122ûF).
5-2. Model DV 14DMR Capacity Screwdriver Machine screw 6 mm (1/4") Wood screw 8 dia. x 75 mm (#20 x 3") Drill Brick 14 mm (9/16") [Depth 30 mm (1-1/4")] Metal Mild steel 13 mm (1/2") [Thickness 1.6 mm (1/16")] Aluminum 13 mm (1/2") [Thickness 1.6 mm (1/16")] Wood 45 mm (1-25/32") [Thickness 18 mm (11/16")] Mount type Screw-on (UNF 1/2" --- 20) Keyless chuck Diameter 1.5 --- 13 mm (1/16" --- 1/2") (13VLRL-N) Rotation speed (No-load) Low: 0 --- 400/min, High: 0 --- 1,750/min Slip torque 1.5 --- 7.
Weight Net Gross Main body unit (including battery) Charger unit (UC 14YFA, including cord) DV 14DMR (2BFK)/(2HFK) DV 14DMR (3BFK)/(3HFK) Charger (UC 14YFA) Battery (EB 14B/EB 1426H/EB 1430H) Phillips (plus) driver bit (No. 2) Side handle Case (injection type) Charger (UC 14YFA) Battery (EB 14B/ EB 1430H) Phillips (plus) driver bit (No.
6. COMPARISONS WITH SIMILAR PRODUCTS 6-1. Model DV 18DMR Maker Max. capacity Model Machine screw Screw driving Wood screw Brick HITACHI DV 18DMR DV 18DV 6 mm (1/4") 6 mm (1/4") 8 mm dia. x 100 mm 8 mm dia. x 75 mm (#20 x 3") (#20 x 4") 16 mm (5/8") 16 mm (5/8") P E Not indicated Not indicated Not indicated 6 mm dia.
Maker Model B (EURO) B (U.S.A.) C Machine screw Not indicated Not indicated Not indicated Wood screw Not indicated 8 mm dia. Brick 16 mm (5/8") 14 mm Not indicated 6 mm dia.
6-2. Model DV 14DMR Max. capacity Maker Model Machine screw Screw driving Wood screw HITACHI DV 14DMR DV 14DV 6 mm (1/4") 6 mm (1/4") 8 mm dia. x 75 mm 8 mm dia. x 50 mm (#20 x 2") (#20 x 3") E Not indicated 6 mm dia.
Maker Q B (EURO) B (U.S.A.) C Machine screw Not indicated Not indicated Not indicated Wood screw Not indicated 8 mm dia. Not indicated 6 mm dia.
7. WORKING PERFORMANCE PER SINGLE CHARGE 7-1. Model DV 18DMR Drilling and fastening performance comparison per charge Working capacity (*1) Type of work Maker Model 50 0 HITACHI 100 DV 18DMR 9.7 80 P 5.5 70 E 6.5 80 Q 250 5.5 130 DV 18DV 7.0 100 B (EURO) 60 7.5 B (U.S.A.) 60 8.2 80 C < High speed > HITACHI 9.6 DV 18DMR 130 3.7 DV 18DV 130 4.0 P 3.4 90 110 E 3.1 140 Q 3.3 B (EURO) 90 3.3 B (U.S.A.) 90 3.
Working capacity (*1) Type of work Maker Model *0 *600 DV 18DMR DV 18DV < High speed > *1800 *1370 HITACHI P *1200 *1740 *2400 *3000 Driling speed (sec./pc.) 0.4 0.5 0.5 *690 E *1050 0.5 Q *1050 0.4 B (EURO) *1030 0.5 B (U.S.A.) *780 0.5 *1400 C 0.6 Remark* Number of machine screws fastened per charge Remark*1 Number of holes or fasteners per charge The above table shows an example of test data. The batteries used in this test are as follows: Model DV 18DMR, DV 18DV, Q, C: 3.
7-2. Model DV 14DMR Drilling and fastening performance comparison per charge Working capacity (*1) Type of work Maker Model 50 0 HITACHI 100 DV 14DMR E 80 Q 80 5.8 7.8 8.3 60 11.7 30 70 C 250 15.1 60 B (EURO) 200 6.2 100 DV 14DV B (U.S.A.) 150 Driling speed (sec./pc.) 9.3 < High speed > HITACHI DV 14DMR 90 4.6 DV 14DV 90 5.6 E 3.4 80 Q 3.7 110 3.7 80 B (EURO) 3.9 70 B (U.S.A.) 4.6 90 C < Low speed > HITACHI DV 14DMR 150 DV 14DV 130 E 100 8.
Working capacity (*1) Type of work Maker Model *0 *1200 *600 DV 14DMR *1800 *1350 HITACHI DV 14DV *1730 *2400 *3000 Driling speed (sec./pc.) 0.4 0.6 E *990 0.4 Q *980 0.5 B (EURO) *970 0.5 *790 B (U.S.A.) 0.5 *1350 C 0.5 < High speed > Remark* Number of machine screws fastened per charge Remark*1 Number of holes or fasteners per charge The above table shows an example of test data. The batteries used in this test are as follows: Model DV 14DMR, DV 14DV, Q, C: 3.
8. PRECAUTIONS IN SALES PROMOTION 8-1. Safety Instructions In the interest of promoting the safest and most efficient use of the Models DV 18DMR and DV 14DMR Cordless Impact Driver Drills by all of 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.
(7) Do not attempt to disassemble the Storage Battery or the Charger. Special devices, such as a thermostat, are built into the storage battery and charger to permit rapid charging. Incorrect parts replacement and/or wiring will cause malfunctions which could result in fire or other hazards. Instruct the customer to bring these units to an authorized service center in the event repair or replacement is necessary.
(3) The following caution is listed on the Name Plate to the Model UC 24YJ Charger. For the U.S.A. and Canada CAUTION For safe operation, see Instruction Manual. Charge HITACHI rechargeable batteries types EB7, EB9, EB12, EB14, EB18 and EB24 series. Other types of batteries may burst causing personal injury and damage. Charge between 32ûF and 104ûF. Rest 15 minutes between the charging of batteries. Indoor use only. Replace defective cord immediately.
8-2. Inherent Drawbacks of Cordless Impact Driver Drills Requiring Particular Attention during Sales Promotion The cordless impact driver drill 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) Precautions in the use of HSS Drill Bits For example, although the Model DV 18DMR is designed for drilling capacities of 50 mm (2") in wood, and 13 mm (1/2") in aluminum and mild steel, this capability is not as efficient as conventional electric power tools. In particular, when drilling through aluminum material with a 13 mm (1/2") drill bit, the drill tends to become locked when the drill bit penetrates through the material.
B. Suggestions and precautions for the efficient use of the charger and storage batteries If any of the storage batteries is exposed to direct sunlight for an extended period or if the temperature of the battery is high immediately after it has been used in the tool, the pilot lamp (red) or the charge time lamp may not be turned on when the battery is connected to the charger. Chargeable temperature ranges of each type of battery are specified as follows.
10. REPAIR GUIDE Be sure to remove the storage batteries from the main body before servicing. Inadvertent triggering of the switch with the storage battery connected will result in danger of accidental turning of the motor. 10-1. Precautions in Disassembly and Reassembly The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List and exploded assembly diagrams for the Models DV 18DMR and DV 14DMR. 10-1-1.
(4) Adjust the Front Cap [4] to " ". (5) Disassembly of the main unit Remove the ten Tapping Screws (W/Flange) D3 x 16 (Black) [36] from the main unit. Holding the battery chamber of Housing (B) [38], gently remove Housing (B) [38]. Then the inside parts can be removed in an assembled or single state. All the parts can be easily removed by raising the Front Cap [4].
Projections of Front Case [12] Projections of switch flange Switch flange Switch Plate [5] Recess of Switch Plate [5] Fig. 4 (c) Disassembly of the clutch mechanism Turn the Nut [6] counterclockwise to remove from the Front Case [12]. Take out the Spring [7], Thrust Washer [8], Stopper [9] and Stopper Spring [10] in order. (9) Disassembly of the power supply unit Disconnect each internal wire of Brush Block [33] and Terminals [48] [50] with a solder iron.
10-1-2. Reassembly Reassembly can generally be carried out as the reverse of the disassembly procedure, with some items to be noted as follows. (1) Reassembly of the power supply unit Perform wiring according to the wiring diagram (Fig. 5). Pay attention to the connecting direction of the internal wires and the terminals. [33] [43] Internal wire (red) [45] Internal wire (black) [50] [48] [49] Internal wire (brown) Internal wire (blue) [47] [46] Fig.
(b) Screw the Nut [6] in the Front Case [12] (see Fig. 7). Align the mark (i) on the Nut [6] with the mark on the Front Case [12] then screw it in. Rotate the Nut [6] about a turn clockwise to align the mark (i) on the Nut [6] with the mark on the Front Case [12]. At this time, check that the "Y" surface of the Nut [6] is almost flush with the "Z" surface of the Front Case [12]. After above step, tighten the Nut [6] so that the Nut [6] pushes the Stopper [9] into the Front Case [12]. Fig.
1 Apply grease approx. 1.2 g (Hitachi Motor Grease No. 29) to the shaded portion in the Front Case [12] (See Fig. 9). NOTE: Be sure to apply grease to the shaded portion in the Front Case [12]. Otherwise, the spindle lock may not work properly. 2 When installing the Lock Ring [15] into the Front Case [12], assemble so that the projections on the Lock Ring [15] engage with the recesses in the Front Case [12]. Make sure that the flat plane of Lock Ring [15] faces the Front Case [12] (see Fig. 9).
4 Pay attention to the mounting direction of the Ring Gear [16], Slide Ring Gear [23], Pinion (C) [24] and Pinion (B) [26] (see Fig. 8). Mount the Front Case [12] to the Rear Case [20] so that the concave portion of the Front Case [12] aligns with the protrusion of the Rear Case [20] (see Fig. 15). 6 Fit the protrusion of Washer (B) [29] in the concave portion of the Rear Case [20] and turn it clockwise viewing from the armature until it contacts the Rear Case [20] (see Fig. 12).
(5) Reassembly of the drive unit (a) Fit the protrusion of the Motor Spacer [30] in the concave portion of the Rear Case [20] engaging the pinion of the Armature and Pinion Set [31] with Planet Gear (A) Set (4 pcs.) [27]. Turn it fully clockwise viewing from the rear of the Armature and Pinion Set [31] (see Fig. 14). [30] [20] Concave portion Protrusion Protrusion Concave portion [29] Fig. 14 (b) Mounting the Shift Arm [21] and the Shift Knob [42] (see Fig. 15).
(c) Mounting the Click Spring [11] and the Front Cap [4]. 1 Mount the Switch Plate [5] aligning with the projections of the Front Case [12] as shown in Fig. 4. 2 Mount the Click Spring [11] to the Front Case [12]. 3 When the Nut [6] is screwed in the Front case [12] about 1-11/12 turns (690û), the mark (i) of the Nut [6] and the marking of Switch Plate [5] are positioned as shown in Fig. 16. Set the narrow slit of switch flange as shown in Fig. 16.
(b) Mount the DC-Speed Control Switch [45] that was not mounted in the above step (a) to Housing (A) [38]. Mount the Pushing Button [44] to Housing (A) [38]. Check that the protrusion of the forward/reverse changeover lever of the DC-Speed Control Switch [45] is inserted into the groove of the Pushing Button [44]. (c) Mount the Strap [55] to Housing (A) [38]. (d) Align Housing (A) [38] with Housing (B) [38] and secure with ten Tapping Screws (W/Flange) D3 x 16 (Black) [36].
(11) Screw tightening torque Special Screw (Left Hand) M6 x 23 [1]..................................................... 3.92 --- 4.9 N•m (40 --- 50 kgf•cm) Drill Chuck 13VLRL-N (W/O Chuck Wrench) [2] ...................................... 17.6 --- 21.6 N•m (180 --- 220 kgf•cm) Screw Set M3 x 12 [22] ............................................................................ 0.62 --- 0.94 N•m (6 --- 10 kgf•cm) Brush Cap [35] ...................................................................................
11. STANDARD REPAIR TIME (UNIT) SCHEDULES MODEL Variable Fixed 10 20 30 Work Flow DV 14DMR DV 18DMR Housing (A).
Hitachi Power Tools LIST NO.
PARTS ITEM NO. 1 CODE NO. 311-959 SPECIAL SCREW (LEFT HAND) M6X23 323-898 DRILL CHUCK 13VLRL-N (W/O CHUCK WRENCH) 1 324-061 GEAR BOX ASS’Y 1 4 324-074 FRONT CAP 1 5 324-136 SWITCH PLATE 1 6 324-064 NUT 1 7 324-135 SPRING 1 8 324-063 THRUST WASHER 1 9 322-972 STOPPER 2 10 322-971 STOPPER SPRING 2 11 320-773 CLICK SPRING 1 12 324-062 FRONT CASE 1 13 322-975 PIN SET (6 PCS.
PARTS ITEM NO. 52 DV 18DMR CODE NO. NO. USED DESCRIPTION REMARKS 320-288 V-LOCK NUT M5 1 * 53 321-918 HOOK ASS’Y (W/LIGHT) 1 INCLUD. 52, 54 FOR USA, CAN * 54 321-672 TAPPING SCREW D2X6 2 FOR USA, CAN 55 306-952 STRAP (BLACK) 1 56 319-926 HOOK SPRING 1 57 320-881 SPECIAL SCREW (A) M5 1 * 58 322-880 BATTERY EB 1820L (W/ENGLISH N.P.) 3 * 58 322-878 BATTERY EB 1826HL (W/ENGLISH N.P.) 2 * 58 322-876 BATTERY EB 1830HL (W/ENGLISH N.P.
DV 18DMR ITEM NO. --- 4 --- CODE NO. DESCRIPTION NO.
Hitachi Power Tools LIST NO.
PARTS ITEM NO. 1 CODE NO. 311-959 SPECIAL SCREW (LEFT HAND) M6X23 1 323-898 DRILL CHUCK 13VLRL-N (W/O CHUCK WRENCH) 1 3 324-061 GEAR BOX ASS’Y 1 4 324-074 FRONT CAP 1 5 324-136 SWITCH PLATE 1 6 324-064 NUT 1 7 324-135 SPRING 1 8 324-063 THRUST WASHER 1 9 322-972 STOPPER 2 10 322-971 STOPPER SPRING 2 11 320-773 CLICK SPRING 1 12 324-062 FRONT CASE 1 13 322-975 PIN SET (6 PCS.
PARTS ITEM NO. 52 DV 14DMR CODE NO. NO. USED DESCRIPTION REMARKS 320-288 V-LOCK NUT M5 1 * 53 321-918 HOOK ASS’Y (W/LIGHT) 1 INCLUD. 52, 54 FOR USA, CAN * 54 321-672 TAPPING SCREW D2X6 2 FOR USA, CAN 55 306-952 STRAP (BLACK) 1 56 319-926 HOOK SPRING 1 57 320-881 SPECIAL SCREW (A) M5 1 * 58 318-372 BATTERY EB 1430H (W/ENGLISH N.P.) 2 * 58 322-883 BATTERY EB 1426H (W/ENGLISH N.P.) 2 * 58 315-130 BATTERY EB 14B (W/ENGLISH N.P.
DV 14DMR ITEM NO. --- 4 --- CODE NO. DESCRIPTION NO.
