T ECHNICAL INFORMATION Model No. Description PRODUCT P 1/ 12 BDA341/ BDA351 L 14.4V/18V Cordless Angle Drill 10mm (3/8") H CONCEPT AND MAIN APPLICATIONS Models BDA341 and BDA351 have been developed as the DC version tools of Model DA3011F, featuring: Lightweight design obtained by using Li-ion battery as a power unit High power 4-pole motor for excellent drilling performance BDA341 Sister tools featuring Keyed drill chuck are also available as Models BDA340/ BDA350. (See Technical Information of BDA340/ BDA350 for detailed information.) BDA351 Dimensions: mm (") BDA341 BDA351 Length (L) 326 (12-7/8) Width (W) 79 (3-1/8) Height (H) 97 (3-13/16) 115 (4-1/2) These products are available in the following variations. BDA341 Battery Battery Plastic carrying Charger type quantity cover case No --No No No Model No. BDA341Z BDA341 BL1430 BDA341RFE (Li-ion 3.0Ah) BDA341RF 2 1 1 No DC18RA W Offered to All countries North America All countries except North America Yes BDA351 Battery Battery Plastic carrying Charger type quantity cover case No --No No No Model No. BDA351Z BDA351 BDA351RFE BDA351RF BL1830 (Li-ion 3.0Ah) 2 1 1 No DC18RA Offered to All countries North America All countries except North America Yes Specification Model Voltage: V Capacity: Ah Cell Max output: W BDA341 14.4 Battery No load speed: min-1=rpm Drill chuck type Capacity of drill chuck: mm (") Capacity: mm (") BDA351 18 3.0 Li-ion 230 280 0 - 1,700 0 - 1,800 Keyless, Single sleeve 1.5 (1/16) - 10 (3/8) Steel Wood 10 (3/8) 25 (1) Yes Electric brake Variable speed control Yes Reverse switch Yes LED job light Net weight: kg (lbs) Yes 1.6 (3.5)* 1.7 (3.7)** Standard equipment *with Battery BL1430 **with Battery BL1830 Side grip ........... 1 Note: The standard equipment for the tool shown above may differ by country. Optional accessories Charger DC24SA (for North America only) Battery BL1430 (for BDA341) Charger DC24SC (except for North America) Battery BL1830 (for BDA351) Drill bits for wood Drill bits for steel Fast charger DC18RA Belt clip P 2/ 12 Features and benefits (The image illustrated below is BDA341.) Ergonomically designed rubberized soft grip High power-to-weight ratio obtained by employing 4-pole motor and Li-ion battery provides comfortable grip and more control while minimizing hand fatigue and pain. 4-pole motor delivers high power for excellent drilling performance. 4-pole motor and Li-ion battery allows for lightweight tool design. Powered by 3.0Ah Li-ion battery: BDA341 by BL1430 (14.4V) BDA351 by BL1830 (18V) Durable aluminum gear housing * Single sleeve keyless chuck allows for easy bit installation/removal with one hand. Easy-to-operate large type * (paddle type) switch trigger Compact angle head with a small head height of 88mm (3-1/2") allows for easy access to screws in tight places. Head height with variable speed control feature convenient for screwdriving LED job light with afterglow function On pulling switch trigger, the light turns on automatically before motor starts turning; keeps on illuminating about 12-13 sec. after trigger release. * *Same advantage as Model DA3011F P 3/ 12 Comparison of products Specification Comparison Makita Model No. Specifications Voltage: V Capacity: Ah Battery Cell Charging time: min. (approx.) No load speed: min-1= rpm Capacities: mm (") Wood Steel Chuck capacity: mm (") Center height*3: mm (") Head height*4: mm (") Rubberized soft grip Aluminum gear housing Switch trigger LED job light HITACHI BDA341/ BDA351 DA3011F DA312D DW966K-2 DW960K-2 DN12DY 14.4/ 18 AC 12 14.4 18 3.0 --- 2.6 1.7 12 3.0 Li-ion 22 with DC18RA --- Ni-MH 60 with DC1414 Ni-Cd Ni-MH 60 27 0 - 1,700/ 0 - 1,800 0 - 2,400 0 - 800 Low: 0 - 400/ Low: 0 - 500/ High: 0 - 1,250 High: 0 - 1,500 0 - 800 25 (1) 10 (3/8) 25 (1) 10 (3/8) 12 (1/2) 10 (3/8) 25 (1) 10 (3/8) 18 (11/16) 10 (3/8) Keyless (Dual sleeve) Keyless (Dual sleeve) 10 (3/8) 26.5 (1-11/16) 111 (4-3/8) No 10 (3/8) 23.5 (15/16) 95 (3-3/4) No No No Multi-grip trigger Single-finger No No Keyless (Single sleeve) Drill chuck DEWALT 10 (3/8) 23.5 (15/16) 88 (3-1/2) Yes Yes Large type (Paddle type) Yes --- Keyless Keyless (Dual sleeve) (Dual sleeve) 10 (3/8) 23.5 (15/16) 93 (3-5/8) No 10 (3/8) 23 (7/8) 104 (4-1/8) No Yes No Large type Single-finger (Paddle type) Yes No Length 326 (12-7/8) 282 (11-1/8) 324 (12-3/4) 315 (12-3/8) 324 (12-3/4) 305 (12) Width 79 (3-1/8) 61 (2-3/8) 94 (3-11/16) 78 (3-1/16) 90 (3-1/2) 73 (2-7/8) Height 97*1/ 115*2 (3-13/16*1/ 4-1/2*2) 93 (3-5/8) 104 (4-1/8) 113 (4-7/16) 140 (5-1/2) 110 (4-5/16) Net weight: kg (lbs) 1.6*1/ 1.7*2 (3.5*1/ 3.7*2) 1.4 (3.1) 1.4 (3.1) 2.0 (4.4) 2.1 (4.7) 1.5 (3.3) Standard equipment Side grip Side grip --- --- --- --- Dimensions: mm (") *1: with Battery BL1430 *2: with Battery BL1830 *4: Head height *3: Center height P 4/ 12 Comparison of products Performance Comparison 14.4V Model Models Tested for Comparison: See the table on right. Model No. Capacity of the battery used: Ah Makita DEWALT HITACHI BDA341 DW966K-2 DN12DY 3.0 2.4 3.0 Note: 1. The test results depend to a great extent on the hardness of the material, etc. 2. Numbers in the charts below are relative values when the capacities of DEWALT DW966K-2 are indexed at 100. Wood Drilling (1) Test conditions: Drilled holes in 38mm thick SPF with 25mm diameter auger bit. [Work speed] slow fast [Work amount] (on a single full battery charge) small large Makita BDA341 135 120 DEWALT DW966K-2 (at High speed) HITACHI DN12DY 100 100 75 0 20 40 60 100 80 100 120 140 160 0 20 40 60 80 100 120 140 160 180 200 Wood Drilling (2) Test conditions: Drilled holes in 30mm thick melapi with 15mm diameter auger bit. [Work speed] slow fast Makita BDA341 DEWALT DW966K-2 (at High speed) HITACHI DN12DY 145 125 100 100 80 0 20 40 [Work amount] (on a single full battery charge) small large 60 120 80 100 120 140 160 0 20 40 60 80 100 120 140 160 180 200 Wood Fastening Test conditions: Drove 5.1x38mm countersunk head screw into SPF. [Work speed] slow fast [Work amount] (on a single full battery charge) small large Makita BDA341 140 120 DEWALT DW966K-2 (at High speed) HITACHI DN12DY 100 100 75 0 20 40 60 120 80 100 120 140 160 0 20 40 60 80 100 120 140 160 180 200 P 5/ 12 Comparison of products Performance Comparison 18V Model Models Tested for Comparison: See the table on right. Makita BDA351 3.0 Model No. Capacity of the battery used: Ah DEWALT DW960K-2 2.4 Note: 1. The test results depend to a great extent on the hardness of the material, etc. 2. Numbers in the charts below are relative values when the capacities of DEWALT DW960K-2 are indexed at 100. Wood Drilling (1) Test conditions: Drilled holes in 38mm thick SPF with 25mm diameter auger bit. [Work speed] slow fast [Work amount] (on a single full battery charge) small large Makita BDA351 115 125 DEWALT DW960K-2 (at High speed) 100 100 0 20 40 60 80 100 120 140 160 0 20 40 60 80 100 120 140 160 Wood Drilling (2) Test conditions: Drilled holes in 30mm thick melapi with 15mm diameter auger bit. [Work speed] slow fast [Work amount] (on a single full battery charge) small large Makita BDA351 120 110 DEWALT DW960K-2 (at High speed) 100 100 0 20 40 60 80 100 120 140 160 0 20 40 60 80 100 120 140 160 Wood Fastening Test conditions: Drove 5.1x38mm countersunk head screw into SPF. [Work speed] slow fast [Work amount] (on a single full battery charge) small large Makita BDA351 110 110 DEWALT DW960K-2 (at High speed) 100 100 0 20 40 60 80 100 120 140 160 0 20 40 60 80 100 120 140 160 P 6/ 12 Repair CAUTION: Remove the bit and the battery from the machine for safety before repair/ maintenance in accordance with the instruction manual!  NECESSARY REPAIRING TOOLS Code No. Description Use for Bearing setting pipe 23-15.2 Drill chuck extractor Bearing extractor Retaining ring S and R pliers Wrench for Bearing retainer (with expanded claw distance from 30mm to 36mm) Adjustable bearing retainer wrench 1R029 1R139 1R269 1R291 1R292 1R316 Assembling Spur gear 29 section to Gear housing Removing Keyless drill chuck Removing Ball bearings Removing Retaining ring S-12 Assembling / Disassembling Bearing retainer 36-43 Assembling / Disassembling Bearing retainer 36-43  LUBRICATION Apply Makita grease N. No.2 to the following portions designated with the black triangle to protect parts and product from unusual abrasion. Item No. 3 5 15 Description Portion to lubricate Amount Spiral bevel gear 9 Teeth portion for smooth engaging with Spiral bevel gear 26 Lock ring Inside where Lock cam contacts Armature Drive end where engages with Spur gear 29 4g a little 2g Makita grease N No. 2 Fig. 1 3 Ball bearing 608ZZ 5 Lock cam Spiral bevel gear 26 Spur gear 29 15 P 7/ 12 Repair  DISASSEMBLY/ASSEMBLY -1. Keyless Drill Chuck DISASSEMBLING Remove Keyless drill chuck as illustrated in Figs. 2 and 3. If it is difficult to remove in this way, Keyless drill chuck can be removed as illustrated in Figs.2A and 3A. Fig. 2 Fig. 3 1. Hold Hex wrench 8 with Keyless drill chuck. 2. Firmly gripping the body in the near of Terminal, turn the machine counterclockwise. Correct setting of Hex Wrench 8 Clamp the long portion of Hex wrench 8 when using vise. Hex wrench 8 Hex wrench 8 Vise Clamp the flat surface of Hex wrench 8. Vise Fig. 2A Fig. 3A 1. Hold Hex wrench 8 with Keyless drill chuck. 1R139 Gap between Keyless drill chuck and Gear housing 2.5mm in thickness 14mm width groove Hex wrench 8 1R139 modified as shown in Fig. 2A Make the thickness of this portion thin to 2.5mm by grinding in order to insert 1R139 into the gap between chuck and Gear housing. 2. Turn Hex wrench 8 counterclockwise by striking with Hammer. ASSEMBLING (1) Do the reverse of the disassembling steps. Refer to Figs. 3 and 2., or Figs. 3A and 2A. (2) Turn the machine or Hex wrench clockwise to tighten Keyless drill chuck. The fastening torque for Drill chuck is 40 - 45 N.m. Note: Keyless drill chuck may further turn resisting shaft lock mechanism, while sounding like clutch in work. This phenomenon does not show any trouble, but Keyless drill chuck is tightened firmly. P 8 / 12 Repair -2 Spiral Bevel Gear 26 DISASSEMBLING (1) Remove Keyless drill chuck as illustrated in Figs. 2 and 3 / Figs. 2A and 3A. And disassemble Bearing retainer as illustrated in Figs. 4 and 5. (2) Disassemble Spiral bevel gear 26 in the order of Figs. 6to 10. Fig. 5 Fig. 4 To fit 1R292 to the notch of Bearing notch for fitting retainer, enlarge this width from 30mm 1R292 to 36mm by grinding 1R292. Remove Bearing retainer 36-43 with 1R292 by turning it clockwise. 1R292 1R292 Clamp the machine with vise. Bearing retainer Bearing retainer 36-43 Fig. 6 Fig. 7 Remove Gear section by striking the edge of Gear housing. Spindle Fig. 8 Remove Bearing box from Spindle. Bearing box can be removed by hand. Remove Ball bearing 608ZZ with 1R269. 1R269 Bearing box Ball bearing 6001DDW Spindle Ball bearing 608ZZ Spiral bevel gear 26 Bearing box Spiral bevel gear 26 Fig. 9 Retaining ring S-12 Ball bearing 608ZZ Fig. 10 1R291 Key 4 Retaining ring S-12 Key 4 Remove Retaining ring S-12 with 1R291. ASSEMBLING Do the reverse of the disassembling steps. Note: Do not forget to assemble Key 4 to Spindle. Refer to Fig. 10. Spiral bevel gear 26 Spiral bevel gear 26 can be removed by hand. Then remove Key 4. P 9/ 12 Repair -3. Spur Gear 29, Spiral Bevel Gear 9 ASSEMBLING Refer to Figs. 11 to 13. Fig. 11 4x45 tapping screw (4pcs.) Gear section Gear housing Gear housing Gasket Gear housing cover Motor housing Gear housing cover Disassemble Gear housing together with Gear housing cover from Motor housing by unscrewing 4x45 Tapping screw. Strike the edge of Gear housing with plastic hammer. Gear section can be removed from Gear housing. Remove Gear housing cover from Gear housing by pulling off. Fig. 12 Disassemble Ball bearing 696ZZ from the shaft of Spiral bevel gear 9 with 1R269. Ring spring 6 Ball bearing 696ZZ 1R269 cut Insert the pick between the groove of spline and the near point to Ring spring’s cut. And Lever up Ring spring with the pick groove of spline Fig. 13 Strike the work table with shaft end of Spiral bevel gear 9. Spur gear 29 can be disassembled from the shaft of Spiral bevel gear 9. Spiral bevel gear 9 Separate Lock ring from Spur gear 29. Lock ring Ball bearing 608ZZ Lock ring Spur gear 29 Lock cam and Pin 3.5 can be removed from Spur gear 29. Lock cam Pin 3.5 Spur gear 29 Spur gear 29 ASSEMBLING (1) Take the reverse of the disassembling steps. Refer to Figs. 13 and 12, Pay attention to Fig. 14. (2) Mount the Gear section to Gear housing as illustrated in Fig. 15. (3) Assemble Gear housing and Gear housing cover to Motor housing by screwing 4x45 Tapping screws. (Fig. 11) Fig. 14 Ball bearing 696ZZ Note: Ring Spring 6 has got wider than the size it was, due to the disassembling step. Therefore, Correct the size and form by pressing it with pliers after assembling to the shaft of Spiral bevel gear 9. Correct the size and form of Ring ring 6 by pressing the portions designated in black arrows. Shaft of Spiral bevel gear 9 Ring spring 6 Fig. 15 Spur gear 29 1R029 protrusion notch notch Assemble the Gear section by pressing spur gear 29 with 1R029, while aligning the protrusions of Lock ring to the notches of Gear housing. Gear housing cover Gasket Gear housing Do not forget to mount Gasket between Gear housing cover and Gear housing. P 10/ 12 Repair  DISASSEMBLY/ASSEMBLY -4. Motor Section DISASSEMBLING (1) Disassemble Gear housing and Gear housing cover from Motor housing by unscrewing 4x45 Tapping screws. (Fig. 11) (2) Remove Motor section from Housing set (L) in the order of Figs.16 and 17. (3) When removing Armature from Brush holder, take the steps illustrated in Figs. 18, 19 and 20. Fig. 16 Fig. 17 3x16 Tapping screw (5pcs.) Housing set (R) Separate Housing set (R) from Housing set (L) by unscrewing 3x16 Tapping screws. Motor Section Brush holder complete Armature Yoke unit Remove York unit, Brush holder complete and Armature in a set when removing Motor section. Link Remove Switch lever and Link. Switch lever Fig. 18 Shift the tail of Torsion spring from top of Carbon brush to the notch of Brush holder. Now Carbon brush is free from the pressure of Torsion spring. Carbon brush Tail of Torsion spring notch Torsion spring tail of Torsion spring Carbon brush notch Fig. 19 Fig. 20 Carbon brush Disconnect Carbon brush from the commutator of Armature by pulling up. Then disssemble Armature and Yoke unit from Brush holder. Pull off Armature from Yoke unit. Armature Armature Carbon brush Yoke unit Yoke unit Brush holder P 11/ 12 Repair  DISASSEMBLY/ASSEMBLY -4. Motor Section (cont.) Fig. 21R ASSEMBLING Fig. 21F Correct (1) Assemble Armature as illustrated in Fig. 21R. Note: Pay attention to the position of notch of Yoke unit. It has to be located on the opposite side of Commutator. (2) Assemble Brush holder to Armature’s Commutator end. However, still keep Carbon brush free from the pressure of Torsion spring of Brush holder in this step. (2) Assemble the Motor section to Housing set (L) as illustrated in Figs. 22 and 23. Fig. 22 Commutator of Armature Wrong Commutator of Armature Notch of Yoke unit Notch of Yoke unit Fig. 23 Protrusion for fitting to Motor Section the notch of Yoke unit Housing set (L) Switch side Yoke unit Armature Brush holder Heat sink notch for fitting to Housing set (L) Fitting the notch of Yoke unit to the protrusion of Housing set (L), assemble the Motor section. Brush holder complete Housing set (R) 90 degrees Housing set (L) Carbon brush Mount Brush holder complete on Commutator so that the angle of two Carbon brushes can be 90 degrees as illustrated above. -5. Assembling F/R Change Lever Fix F/R Change lever to Switch as illustrated in Fig. 24. Fig. 24 FET Protrusion of Switch for fitting F/R Change Lever’s concave Concave of F/R change lever for fitting to protrusion of Switch -6. Disassembling Terminal Flag terminal for this product is equipped with Stopper for firm connection. Remove Flag terminal as illustrated in Fig. 25. Fig. 25 Stopper (for firm connection of Flag Terminal) 1. While pushing Stopper with thin screwdriver, hitch the Flag terminal with the screwdriver. Flag terminal 2. Pull off the Flag terminal. Circuit P 12/ 12 diagram Fig. D-1 When connecting Lead wires of Brush holder complete to Switch, connect them as follows. * Lead wire (black) to M2 Terminal * Lead wire (red) to M1 Terminal Color index of lead wires' sheath Black White Red Brush holder complete Switch Terminal FET Connector of Switch Connector of LED circuit Wiring LED circuit Switch lever side diagram Fig. D-2 Wiring of LED Circuit (before setting Switch and other electrical Parts) Lead wires of LED Circuit has to be guided in Housing set (L) as illustrated below, and fix them with Lead wire holders. Lead wire holders LED circuit has to be put into Housing set (L) as illustrated below. Connector of LED circuit is connected with Connector of Switch in the next step. Fig. D-3 Wiring after setting Switch and other electrical parts Put the extra portion of Lead wires in this place. Fix the Lead wires of Connectors with these Lead wire holders. FET Heat sink Connector of Switch side Armature Yoke unit Connector of LED side Terminal Put the extra portion of Lead wires in this place. Brush holder complete Switch Lead wire holders Fix Lead wires of Brush holder complete with these Lead wire holders. And put the Lead wires of Brush holder complete in the position illustrated above, expanding them between York unit and Brush holder complete.