Hitachi D10YB Manual

POWER TOOLS
TECHNICAL DATA
AND
SERVICE MANUAL
ANGLE DRILL
D 10YB
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LIST No. 0193 Jun. 2000
D
MODEL
D 10YB

Page
CONTENTS
1. PRODUCT NAME •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
2. MARKETING OBJECTIVE ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
3. APPLICATIONS ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
4. SELLING POINTS ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• • 1
4-1. Selling Point Descriptions ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 2
5. SPECIFICATIONS •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 3
6. COMPARISONS WITH SIMILAR PRODUCTS ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 4
6-1. Specification Comparisons •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 4
6-2. Drilling Speed Comparisons •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 5
7. PRECAUTIONS IN SALES PROMOTION ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 6
7-1. Handling Instructions •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 6
7-2. Caution on Name Plate •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 6
8. PRECAUTIONS IN DISASSEMBLYAND REASSEMBLY•••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 7
8-1. Disassembly ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 7
8-2. Reassembly •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• •10
8-3. Wiring Diagram and Internal Wire Arrangement •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 12
8-4. Lubrication ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 15
8-5. Tightening Torque ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 15
8-6. Insulation Tests ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 15
8-7. No-load Current Value ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 15
9. STANDARD REPAIR TIME (UNIT) SCHEDULES •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 16
Assembly Diagram for D 10YB ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 17
Notice for use
Specifications and parts are subject to change for improvement.
Refer to Hitachi Power Tool Technical News for further information.

--- 1 ---
1. PRODUCT NAME
Hitachi Angle Drill, Model D 10YB
2. MARKETING OBJECTIVE
The Model D 10YB has been developed based on the current Model D 10YA (10 mm) to meet the market demand
for an angle drill with a forward/reverse changeover switch, a small-diameter housing, and a small head.
The key features of the Model D 10YB are as follows.
(1) Easy-to-grip small-diameter housing
(2) Forward/reverse changeover switch
(3) Small head
(4) Powerful 500 W motor
(5) Fast drilling speed
With the introduction of the Model D 10YB, we aim to make the angle drill series more competitive and to expand
the market share.
3. APPLICATIONS
Drilling in metal, wood and plastics
4. SELLING POINTS
Lightweight 1.5 kg (3.3 lbs.)
Slide switch located in a convenient position
* Subject to change by area.
Forward/reverse changeover switch
Easy-to-grip small-diameter housing
Smallest head in this class
(83 mm (3-1/4"))
Powerful 500 W motor* (class leader)

--- 2 ---
Maker •Model
Item
Steel mm
Wood mm
Power consumption W
4-1. Selling Point Descriptions
4-1-1. Easy-to-grip small-diameter housing
As in the case of disc grinders, a small-diameter housing makes it easy to grip and improves operability.
The slide switch located on the lower portion of the housing can be operated while gripping the tool.
4-1-2. Forward/reverse changeover switch
The Model D 10YB is equipped with a forward/reverse changeover switch. This switch expands the application
range to such tasks as loosening screws and locked drill bits.
4-1-3. Smallest head in this class
The Model D 10YB has the smallest head (head height (h) 83 mm, center height (L) 22.5 mm) in this class for
efficient drilling in confined spaces.
4-1-4. Powerful 500 W motor
Thanks to the powerful 500 W motor, the maximum drilling capacity in wood is increased to 22 mm dia.
The Model D 10YB can be used for a wider range of drilling work.
Maker •Model
Item
h (Head height) mm
L (Center height) mm
Hitachi
D 10YB D 10YA
83 (3-1/4")
22.5 (7/8")
96 (3-3/4")
23 (15/16")
88 (3-1/2") 87 (3-3/8")
23 (15/16") 25 (1")
BC
Hitachi
D 10YB D 10YA
10 (3/8")
22 (7/8")
10 (3/8")
15 (5/8")
10 (3/8") 10 (3/8")
22 (7/8") 15 (5/8")
BC
Drilling
capacity
500 (0.67 HP) 400 (0.54 HP) 400 (0.54 HP) 300 (0.40 HP)
L
h

--- 3 ---
5. SPECIFICATIONS
Aluminum alloy die casting
Capacity
Drill chuck
Power source
Voltage, current and
power input
Type of motor
Enclosure
Insulation structure
Type of switch
Speed
Full-load output
Weight
Packaging
Cord
Standard accessories
Steel: 10 mm (3/8")
Wood: 22 mm (7/8")
Mount type: 3/8"-24UNF
Chuck: 10 TLRD
Capacity: 1.5 to 10 mm (1/16" to 3/8")
AC single phase 50/60 Hz
Single-phase series commutator motor
Housing
Tail cover
Inner cover
Double insulation
Slide switch
No-load speed: 2,300/min.
Full-load speed: 1,820/min.
Net: 1.5 kg (3.3 lbs.)*
Packaged: 2.0 kg (4.4 lbs.)
Corrugated cardboard box
Type: 2-core cabtire cord
Nominal sectional area: 0.75 mm2
Length: 2.5 m (8.2 ft.)
Side handle ••••••••••••••••••••••••••••• 1
Chuck handle •••••••••••••••••••••••••••• 1
250 W (0.34 HP)
Voltage (V) Current (A) Power input (W)
110 4.8
115 4.6
220
230
240 2.2
2.3 500
(0.67 HP)
* Net weight excludes cord.
Gear cover
Chuck cover
Polyamide resin

--- 4 ---
Item
Steel
Wood
Drill chuck capacity
Input
No-load rotation speed
Weight**
Full-load rotation speed
Full-load output
Max. output
Max. torque
No-load sound pressure level
Side handle
Cord
Length x Width
Dimensions Head height
Center height
mm
mm
mm
W
/min.
kg
/min.
W
W
N•m
dB(A)
m
mm
mm
mm
6. COMPARISONS WITH SIMILAR PRODUCTS
6-1. Specification Comparisons
Model
Catalog specifications
D 10YB
10 (3/8")
22 (7/8")
10 (3/8")
500* (0.67HP)
500 to 2,300
1.5 (3.3 lbs.)
1,650
250 (0.34 HP)
490 (0.66 HP)
12
78
Equipped
2.5 (8.2 ft.)
290 x 74
(11-7/16" x 2-29/32")
83 (3-1/4")
22.5 (7/8")
D 10YA
10 (3/8")
15 (5/8")
10 (3/8")
400 (0.54HP)
300 to 2,300
1.7 (3.8 lbs.)
1,700
230 (0.31 HP)
460 (0.62 HP)
11
78
Equipped
2.5 (8.2 ft.)
268 x 78
(10-9/16" x 3-1/16")
96 (3-3/4")
23 (15/16")
10 (3/8")
15 (5/8")
10 (3/8")
300 (0.40HP)
0 to 1,400
1.6 (3.5 lbs.)
1,130
120 (0.16 HP)
250 (0.34 HP)
10
83
None
2.0 (6.6 ft.)
270 x 76
(10-5/8" x 3")
87 (3-3/8")
25 (1")
10 (3/8")
22 (7/8")
10 (3/8")
400 (0.54HP)
0 to 1,100
1.6 (3.5 lbs.)
950
120 (0.16 HP)
260 (0.35 HP)
10
81
None
2.5 (8.2 ft.)
290 x 59
(11-7/16" x 2-5/16")
88 (3-1/2")
23 (15/16")
Characteristics
Structural features
BC
Hitachi
* Power input is subject to change by areas.
** Weight excludes cord.
Capacity

--- 5 ---
6-2. Drilling Speed Comparisons
The figures below show the drilling speed of the Model D 10YB compared with the competitors' existing models.
(1) Drilling in steel
Model name
(2) Drilling in wood
6.5 mm dia.
10 mm dia.
D 10YB
Hitachi D 10YA
Hitachi BC
30
25
20
15
10
5
0
Drilling speed (mm/min.)
15 mm dia.
22 mm dia. *
D 10YB
Hitachi D 10YA
Hitachi BC
2,500
2,000
1,500
1,000
500
0
Drilling speed (mm/min.)
Model name
* Note that 22 mm dia.
drilling is more than the
maximum capacity of
the Model D 10YAand
C.

--- 6 ---
7. PRECAUTIONS IN SALES PROMOTION
In the interest of promoting the safest and most efficient use of the Model D 10YBAngle Drill 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 Name Plate attached to each tool.
7-1. Handling Instructions
Although every effort is made in each step of design, manufacture and inspection to provide protection against
safety hazards, the dangers inherent in the use of any electric power tool cannot be completely eliminated.
Accordingly, general precautions and suggestions for the use of electric power tools, and specific precautions
and suggestions for the use of the Angle Drills are listed in the Handling Instructions to enhance the safe, efficient
use of the tool by the customer. Salespersons must be thoroughly familiar with the contents of the Handling
Instructions to be able to offer appropriate guidance to the customer during sales promotion.
7-2. Caution on Name Plate
Each Model D 10YB unit is provided with a Caution Plate (illustrated below) which lists basic safety precautions
for its use. Carefully ensure that the customer fully understands and follows these precautions before using the
tool.
(1) For Australia, New Zealand and China
(2) For the U.S.A. and Canada

--- 7 ---
(Note) When the drill chuck cannot be removed by tapping:
Remove the four Tapping Screws D5 x 40 [1] and the pinion ass'y (assembly of the First Gear [5], Ball Bearing
[3] and the Second Pinion [4]).
Remove the four Seal Lock Hex. Socket Hd. Bolts M3 x 12 [22] and tap the Gear Cover [2] strongly with a
wooden hammer to remove the Chuck Cover [21], Spindle [19] and others together (See Fig. 2). At this time,
be sure to tap on the two screw holes, not the center of the Gear Cover [2]. Otherwise, the Gear Cover [2] may
be deformed.
Secure the J-309 tool in a vise. Insert the pin of the J-309 tool into the hole at the rear of the Gear [20] and
loosen the Drill Chuck 10TLRD [25]. When it is difficult to loosen the Drill Chuck 10TLRD [25] with a hex. bar
wrench, use another tool such as a pipe to lengthen the handle and increase leverage (See Fig. 3).
8. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY
The [Bold] numbers in the descriptions below correspond to the item numbers in the parts list and exploded
assembly diagram.
8.1 Disassembly
(1) Replacement of the drill chuck
(a) Insert the Chuck Handle 10TLRD [26] into the Drill Chuck 10TLRD [25] until the Drill Chuck 10TLRD [25] is
secured to the Chuck Cover [21] (See Fig. 1). To avoid damage to the Chuck Cover [21], put a cloth between
the Chuck Cover [21] and the Chuck Handle 10TLRD [26].
(b) Insert a flat-blade screwdriver into the Drill Chuck 10TLRD [25] and remove the Flat Hd. Screw (Left Hand)
M5 x 15 [27].
(c) The Drill Chuck 10TLRD [25] is secured to the Spindle [19] with screws. Insert the Chuck Handle 10TLRD
[26] into the Drill Chuck 10TLRD [25] and strongly tap it with a wooden hammer counterclockwise viewing
from the Drill Chuck 10TLRD [25] side. Then the Drill Chuck 10TLRD [25] can be removed.
Fig. 1
Put a cloth to avoid damage to the chuck cover.
Drill Chuck 10TLRD [25]
Flat Hd. Screw (Left Hand) M5 x 15 [27]
Chuck Handle 10TLRD [26]

--- 8 ---
(2) Disassembly of the spindle section
(a) Remove the four Seal Lock Hex. Socket Hd. Botls M3 x 12 [22] and remove the Chuck Cover [21].
(b) Remove the four Tapping Screws D5 x 40 [1] from the Gear Cover [2] and remove the Gear Cover [2] from the
Inner Cover [8]. At this time, the pinion ass'y (assembly of the Ball Bearing [3], Second Pinion [4] and First
Gear [5]) can be removed. If the pinion ass'y remains in the Inner Cover [8], tap the end surface of the Inner
Cover [8], and the pinion ass'y can be removed.
(c) Tap the flush surfaces of the Gear Cover [2] and the Inner Cover [8] with a wooden hammer. Then the pinion
ass'y (assembly of the Ball Bearing [3], Second Pinion [4] and First Gear [5]) can be removed from the Gear
Cover [2] with the First Gear [5] and the Ball Bearing [3] press-fitted.
(d) Use the J-310 tool for disassembly of the Spindle [19] because the Spindle [19] is press-fitted to the Ball
Bearing [18] which is secured to the Gear Cover [2] with the two Flat Fillister Hd. Screws M4 x 10 [17].
Set up the J-310 tool as shown in Fig. 4 and then pull out the Spindle [19] by turning the sleeve clockwise with
a wrench.
(e) Place the Gear [20] on a cylindrical jig and press down on the Spindle [19] to remove the Gear [20] from the
Spindle [19] (See Fig. 5).
(f) Remove the Flat Fillister Hd. Screw M4 x 10 [17] from the Ball Bearing [18] and tap the Gear Cover [2] with a
wooden hammer. Then, the Ball Bearing [18] can be removed.
Fig. 4
Sleeve nut (J-310)
Flat Fillister Hd. Screw M4 x 10 [17]
Ball Bearing [18]
Holder plate (J-310)
Sleeve (J-136)
Spindle [19]
Left-hand screw
Gear Cover [2]
22 mm wrench
Gear Cover [2]
Gear [20]
Secure two pins of the
J-309 tool into the holes
at the rear of the gear.
Hex. bar wrench
Pin (J-309)
Fig. 2 Fig. 3
Tap on these two holes
from the bottom.
Drill Chuck 10TLRD [25]
J-309 tool
Secured to the vise.
Gear [20]

--- 9 ---
(3) Disassembly of the second pinion
(a) Place the end surface of the First Gear [5] on a cylindrical jig and press down on the Second Pinion [4] with a
hand press. Then the Second Pinion [4] can be removed (See Fig. 6).
(d) Remove the Brush Holder [28] from the Housing Ass'y [32]. Pull out the terminals of the internal wires (blue
and brown) from the Reversing Switch [48] from the Brush Holder [28].
(e) Remove the Reversing Switch [48] by slightly pushing the protrusion of the Controller Circuit Holder [34] which
holds the Reversing Switch [48]. Be careful not to apply excessive force to the protrusion to prevent damages
to the protrusion.
(f) Disconnect the two internal wires of the Stator Ass'y [13] from the Reversing Switch [48] terminals.
(g) Loosen the two Tapping Screws (W/Flange) D4 x 16 [36] on the Cord Clip [35] and the machine screw M3.5
on the Switch [46]. Remove the Cord [42] from the Controller Circuit Holder [34].
(4) Disassembly of the power source section
(a) Loosen the two Tapping Screws (W/Flange) D4 x 16 [41], remove the Tail Cover [40] from the HousingAss'y
[32] and then remove the Spring [47].
(b) Disconnect the terminal of the neutral conductor internal wire (transparent) for the noise suppressor coming
from the Controller Circuit Holder [34] from the Housing Ass'y [32] (only the products with noise suppressor).
(c) The Connector 50091 [49] which clamps the internal wire (black) coming from the Controller Circuit Holder
[34] and the internal wire coming from the Stator Ass'y [13] is secured at the protrusion of the Controller
Circuit Holder [34]. Remove the Connector 50091 [49] by lifting the tip portion with a small screwdriver
(See Fig. 7).
Fig. 7
Fig. 5
Spindle [19]
Cylindrical jig
Gear [20]
Cylindrical jig
First Gear [5]
Second Pinion [4]
Fig. 6
18 mm dia. 15 mm dia.
Press down Press down
Protrusion of the controller circuit holder
Remove the connector by lifting the tip portion
with a small screwdriver.
Connector 50091 [49]
(connecting the stator ass'y and the controller circuit holder)

--- 10 ---
(h) Remove the Switch [46] by slightly pushing the two protrusions of the Controller Circuit Holder [34].
Be careful not to apply excessive force to the protrusions to prevent damages to the protrusions.
(i) Loosen the two Tapping Screws (W/Flange) D4 x 20 [37] and remove the Controller Circuit Holder [34] from
the Housing Ass'y [32].
(5) Disassembly of the armature and the stator
(a) Remove the four Tapping Screws D5 x 40 [1] from the Gear Cover [2] and insert a screwdriver between the
Inner Cover [8] and the Housing Ass'y [32]. Pry the assembly of the Gear Cover [2], Inner Cover [8] and
Armature [10] off with the screwdriver. At this time, be sure to remove the Carbon Brushes [29].
(b) Remove the Fan Guide [11]. Remove the two Hex. Hd. Tapping Screws D4 x 70 [12] from the Stator Ass'y
[13] and tap the end surface of the Housing Ass'y [32] slightly with a wooden hammer. Then, the StatorAss'y
[13] can be removed. Before removing the Stator Ass'y [13], disconnect the internal wires and remove the
Brush Holders [28] from the Housing Ass'y [32].
8.2 Reassembly
Reassembly can be accomplished by following the disassembly procedures in reverse. However, special
attention should be given to the following items.
8.2.1 Reassembly of the spindle section
(1) First, mount the Chuck Cover [21], Felt Packing (A) [23], Felt Packing [24] and the Drill Chuck 10TLRD [25]
and then tighten the Spindle [19] and the Drill Chuck 10TLRD [25] at the proper tightening torque using the
J-309 tool. Next, tighten the Flat Hd. Screw (Left Hand) M5 x 15 [27] (See Fig. 8).
(2) Secure the Ball Bearing [18] to the Gear Cover [2] with the Flat Fillister Hd. Screw M4 x 10 [17]. Hold the
head of the Gear Cover [2] and press down on the end surface of the Drill Chuck 10TLRD [25] with a hand
press to press-fit the spindle section into the above assembly.
Fig. 8
End surface of drill chuck
Flat. Hd. Screw (Left Hand) M5 x 15 [27]
Gear [20]
Felt Packing (A) [23]
Chuck Cover [21] Felt Packing [24]
Drill Chuck 10TLRD [25]
J-309
Secure with a vise.
Spindle [19]

--- 11 ---
8.2.2 Reassembly of the power source section
(1) Before inserting the Stator Ass'y [13] into the Housing Ass'y [32], be sure to mount the Slide Bar [45].
(2) Insert the Stator Ass'y [13] into the Housing Ass'y [32] in the direction shown in Fig. 9, paying attention to the
direction of the internal wires of the Stator Ass'y [13]. Connect the four internal wires of the Stator Ass'y [13]
to the parts specified in Fig. 9.
(3) Secure the Connector 50091[49] that clamps the internal wires (black) of the Stator Ass'y [13] and the
Controller Circuit Holder [34] under the protrusion of the Controller Circuit Holder [34] by pushing it in as
shown in Fig. 10.
(4) Be sure to push the internal wire (brown) coming from the Reversing Switch [48] in the gap shown in Fig. 10.
Otherwise, the internal wire may be caught by the Spring [47] and the switch may be out of work.
Connect to the terminal No. 3
of the reversing switch.
Clamp with the internal wire (black)
of the controller circuit holder.
Connect to the terminal No. 3 of the switch
and secure with the machine screw M3.5.
Connect to the terminal No. 1
of the reversing switch.
Fig. 10
Connector [49]
(connecting the stator ass'y and the controller circuit holder)
Push the internal wire in this gap.
Protrusion of the controller circuit holder
Push in the connector under the protrusion.
Fig. 9

--- 12 ---
8-3. Wiring Diagram and Internal Wire Arrangement
(1) For models with noise suppressor and choke coils
Black: from the stator Black: from the
control circuit Black or blue or white:
from the stator
Stator
coil
Control circuit
ON-OFF switch
Cord
Choke coil
Armature
Choke coil
Black or blue
or white
Black Pillar terminal
Black or
blue or
white
Reversing
switch CR unit *
Connector
Black Red
Blue Black Black
Noise suppressor
Wiring diagram
Control circuit
Cord
Red: from the control circuit Black or blue or white:
from the control circuit Black or blue or white:
from the stator
Black: from the statorNoise suppressor
Brown: from the reversing switch
Black:
from the stator Reversing
switch
Choke coil
Blue: from the
reversing switch
Lead wire arrangement
* Only 230 V product for Europe
1
3
1
5
3
2
Brown

--- 13 ---
(2) For models without noise suppressor and choke coils (except for U.S.A. and Canada)
Black
or blue
Black
Cord
Red
Black
Black
Stator
coil
Black ON-OFF switch
Black
or blue
Connector
Control circuitArmature
Brown
Blue
Reversing
switch 1
3
Stator
coil Connector
1
3
2
5
Red: from the
control circuit
Cord
Control circuit
Black:
from the stator
Brown:
from the reversing switch
Black or blue:
from the stator
Black or blue:
from the control circuit
Black:
from the stator
Black:
from the control circuit
Black:
from the stator Black or blue: from the stator
Blue:
from the reversing switch Reversing switch
Wiring diagram
Internal wire arrangement

--- 14 ---
(3) For U.S.A. and Canada
Black:
from the stator
Black:
from the control circuit
Black:
from the stator White: from the stator
Blue: from the
reversing switch
Reversing
switch
Internal wire arrangement
Red: from the
control circuit
Cord
Control circuit
Black:
from the stator
Brown:
from the reversing switch
White: from the stator
White :
from the control circuit
White
Black
Cord
Red
BlackBlack
Stator
coil
Black
ON-OFF switch
White
Pillar terminal
Armature
Brown
Blue
Reversing
switch 1
3
Stator
coil Connector
1
3
2
5
Wiring diagram
Control circuit

--- 15 ---
8-4. Lubrication
(1) Grease to be used: Motor Grease No. 29
(Code No. 930035) •••100 g tube
(Code No. 930038) ••• 2.5 kg can
(2) Apply Motor Grease No. 29 to the following portions.
Inside of the Gear Cover [2] (Apply 5 g of this grease to a new gear cover.)
Needle bearing in the Chuck Cover [21]
Tooth portion of the Gear [20]
Pinion portion of the Second Pinion [4]
Tooth portion of the First Gear [5]
Pinion portion of the Armature [10]
8-5. Tightening Torque
(1) Hex. Hd. Tapping Screw D4 x 70 [12] •••••••••••••••••••••••••••• 2.0 0.5 N•m (20 5 kgf•cm)
(2) Tapping Screw (W/Flange) D4 x 16 [36] •••••••••••••••••••••••• 2.0 0.5 N•m (20 5 kgf•cm)
(3) Tapping Screw (W/Flange) D4 x 20 [37] •••••••••••••••••••••••• 2.0 0.5 N•m (20 5 kgf•cm)
(4) Tapping Screw (W/Flange) D4 x 16 (Black) [41] •••••••••••• 2.0 0.5 N•m (20 5 kgf•cm)
(5) Tapping Screw D5 x 40 (Black) [1] •••••••••••••••••••••••••••••• 2.9 0.5 N•m (30 5 kgf•cm)
(6) Flat Fillister Hd. Screw M4 x 10 [17] ••••••••••••••••••••••••••••• 1.5 0.3 N•m (15 3 kgf•cm)
(7) Machine Screw M3.5 (for securing the Switch [46]) ••••••• 0.59 0.15 N•m (6 1.5 kgf•cm)
(8) Seal Lock Hex. Socket Hd. Bolt M3 x 12 [22] •••••••••••••••• 2.45 0.49 N•m (25 5 kgf•cm)
(9) Flat Hd. Screw (Left Hand) M5 x 15 [27] ••••••••••••••••••••••• 3.4 0.7 N•m (35 7 kgf•cm)
(10) Drill Chuck 10TLRD [25] •••••••••••••••••••••••••••••••••••••••••••• 24.5 to 29.4 N•m (250 to 300 kgf•cm)
8-6. Insulation Tests
On completion of disassembly after repair, measure the insulation resistance and conduct a dielectric
strength test.
Insulation resistance: 7 MΩor more with DC 500 V Megohm Tester
Dielectric strength: AC 4,000 V/1 minute, with no abnormalities ••• 220 V --- 240 V
(and 110 V for U.K. products)
AC 2,500 V/1 minute, with no abnormalities •••110 V --- 115 V
(except U.K. products)
8-7. No-load Current Value
After no-load operation for 30 minutes, the no-load current values should be as follows (dial setting "5"):
Voltage (V)
Current (A) max.
110 115
2.1 2.2
220 230 240
1.0 1.1 1.1

--- 16 ---
9. STANDARD REPAIR TIME (UNIT) SCHEDULES
MODEL 10 20 30 40
Fixed Variable
D 10YB Work Flow
Tail Cover
Cord
Controller
Circuit Holder
Switch
Reversing
Switch
60 min.
50
Housing Ass'y
Stator Ass'y
First Gear
Ball Bearing
(606ZZ)
Second Pinion
Ball Bearing
(6001VV)
General Assembly Inner Cover
Ball Bearing
(608DD)
Ball Bearing
(626VV)
Armature
Gear Cover
Ball Bearing
(607VV)
Spindle
Gear
Chuck Cover

--- 17 ---
Assembly Diagram for D 10YB

--- 18 ---
PARTS
D 10YB
: ALTERNATIVE PARTS
ITEM
NO. CODE NO. DESCRIPTION NO.
USED
REMARKS
1 316-458 TAPPING SCREW D5X40 (BLACK) 4
2 318-828 GEAR COVER 1
3 600-1VV BALL BEARING 6001VVCMPS2L 1
4 318-833 SECOND PINION 1
5 318-834 FIRST GEAR 1
6 606-ZZM BALL BEARING 606ZZC2PS2L 1
7 931-701 BEARING LOCK 1
8 318-827 INNER COVER 1
9 608-DDM BALL BEARING 608DDC2PS2L 1
* 10 360-528U ARMATURE ASS'Y 110V-115V 1 INCLUD.9,15,16
* 10 360-528E ARMATURE 220V-230V 1
* 10 360-528F ARMATURE 240V 1
11 306-840 FAN GUIDE 1
12 982-021 HEX. HD. TAPPING SCREW D4X70 2
* 13 340-469C STATOR ASS'Y 110V-115V 1 INCLUD.14
* 13 340-469G STATOR ASS'Y 220V-230V 1 INCLUD.14
* 13 340-469E STATOR ASS'Y 220V-230V 1 INCLUD.14 FOR NZL,AUS,GBR(230V),ITA,
FRG,FRA,HOL,FIN,AUT,NOR,ESP,SUI,CHN
* 13 340-469F STATOR ASS'Y 240V 1 INCLUD.14
14 980-063 TERMINAL 1
15 313-775 DUST SEAL 1
16 626-VVM BALL BEARING 626VVC2PS2L 1
17 985-414 FLAT FILLISTER HD. SCREW M4X10 2
18 607-VVC BALL BEARING 607VVC2PS2L 1
19 318-830 SPINDLE 1
20 318-829 GEAR 1
21 318-831 CHUCK COVER 1
22 318-832 SEAL LOCK HEX. SOCKET HD. BOLT M3X12 4
23 936-973 FELT PACKING (A) 1
24 943-153 FELT PACKING 1
25 318-835 DRILL CHUCK 10TLRD 1 INCLUD.26
26 319-070 CHUCK HANDLE 10TLRD 1
27 317-995 FLAT HD. SCREW (LEFT HAND) M5X15 1
28 313-777 BRUSH HOLDER 2
29 999-021 CARBON BRUSH (1 PAIR) 2
30 936-551 BRUSH CAP 2
31 309-929 RUBBER BUSHING 1
32 318-839 HOUSING ASS'Y 1 INCLUD.31
33 NAME PLATE 1
* 34 319-059 CONTROLLER CIRCUIT HOLDER 1
* 34 319-060 CONTROLLER CIRCUIT HOLDER 1 FOR UAE,AUS
* 34 319-058 CONTROLLER CIRCUIT HOLDER 1 FOR GBR (110V),USA
35 937-631 CORD CLIP 1
36 984-750 TAPPING SCREW (W/FLANGE) D4X16 2
37 305-095 TAPPING SCREW (W/FLANGE) D4X20 2
* 38 980-063 TERMINAL 1 FOR CORD
39 953-327 CORD ARMOR D8.8 1
40 318-836 TAIL COVER 1
41 307-811
TAPPING SCREW (W/FLANGE) D4X16 (BLACK) 2
* 42 500-409Z CORD 1 (CORD ARMOR D8.8)
* 42 500-468Z CORD 1 (CORD ARMOR D8.8) FOR THA,CHN
*4 --- 00