Sears Craftsman 315.10280 User manual

SEARS
OWNERS
MANUAL
MODEL NO.
315.10280
CAUTION:
Read Rules for
Safe Operation
and Instructions
Carefully
SAVE THIS
MANUAL FOR
FUTURE REFERENCE
Y254a-2a
Designed exclusively for and sold only by
SEARS, ROEBUCK AND CO., Dept. 698/731A, Sears Tower. Chicago, IL 60684
CRAFTSMAN
1/2 INCH
ELECTRIC DRILL
VARIABLE SPEED-REVERSIBLE
DOUBLE INSULATED
Introduction
Operation
Maintenance
Repair Parts

FULL ONE YEAR WARRANTY ON CRAFTSMAN ELECTRIC DRILL
If this Craftsman Electric Drill fails to give complete satisfaction within one year from the date of pur-
chase RETURN IT TO THE NEAREST SEARS STORE THROUGHOUT THE UNITED STATES and Sears
will repair it, free of charge.
If this electric drill is used for commercial or rental purposes this warranty applies for only 90 days
from the date of purchase.
This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state.
SEARS, ROEBUCK AND
CO.
DEPT. 698/731A
SEARS TOWER
CHICAGO,
IL 60684
INTRODUCTION
tric power tools, which eliminates the need for the
supply
system. Wherever there is electric current In
the tool there are two complete sets of insulation to
protect the user. All exposed metal parts are isolated
from the internal metal motor components with pro-
DOUBLE INSULATION is a concept in safety, in elec-
usual three wire grounded power cord and grounded

sulation requires extreme care and knowledge of the
system and should be performed only by a qualified
service technician. For service we suggest
you
return the
fool
to your nearest Sears Store for repair.
Always use original factory replacement parts when
servicing.
IMPORTANT
- Servicing of
a tool with double in-
tecting insulation.
RULES FOR SAFE OPERATION
Ail,WARNING - DO NOT ATTEMPT TO OPERATE THIS TOOL UNTIL YOU HAVE
READ
THOROUGHLY AND
UNDERSTAND
COMPLETELY ALL INSTRUCTIONS. SAFETY RULES, ETC., CONTAINED IN THIS MANUAL.
FAILURE TO COMPLY CAN RESULT IN ACCIDENTS INVOLVING FIRE. ELECTRIC SHOCK. OR SERIOUS
PERSONAL INJURY. SAVE OWNERS MANUAL AND REVIEW FREQUENTLY FOR CONTINUING SAFE
OPERATION, AND INSTRUCTING POSSIBLE THIRD-PARY USER.
READ ALL INSTRUCTIONS
1. KNOW YOUR POWER TOOL

Read owner's manual carefully. Learn its ap-
plications and limitations as well as the specific potential hazards related to
this tool.
2. GUARD AGAINST ELECTRICAL SHOCK BY PREVENTING BODY CONTACT
WITH GROUNDED SURFACES.
For example: Pipes, radiators, ranges, refrig-
erator enclosures.
3.
KEEP GUARDS IN PLACE
and in working order.
4. KEEP WORK AREA CLEAN.
Cluttered areas and benches invite accidents.
5. AVOID DANGEROUS ENVIRONMENT.
Don't use power tool in damp or wet
locations or expose to rain. Keep work area well lit.
6. KEEP CHILDREN AWAY.
All visitors should wear safety glasses and be kept
a safe distance from work area. Do not let visitors contact tool or extension
cord.
7. STORE IDLE TOOLS.
When not in use, tools should be stored in a dry, high or
locked-up place - out of the reach of children.
8. DON'T FORCE TOOL.
It will do the job better and safer at the rate for which it
was designed.
9. USE RIGHT TOOL. Don't force small tool or attachment to do the job of a heavy
duty tool. Don't use tool for purpose not intended - for example - Don't use
a circular saw for cutting tree limbs or logs.
10. WEAR PROPER APPAREL. No loose clothing or jewelry to get caught in moving
parts. Rubber gloves and footwear are recommended when working outdoors.
Also, wear protective hair covering to contain long hair.
11. USE SAFETY GLASSES
with all tools. Also face or dust mask if operation is
dusty.
Page
2
RULES FOR SAFE OPERATION (Continued)
12.
DON'T ABUSE CORD.
Never carry tool by cord or yank it to disconnect from
receptacle. Keep Cord from heat, oil, and sharp edges.
13. SECURE WORK.
Use clamps or a vise to hold work. Both hands are needed to
operate the tool.
14.
DON'T OVERREACH.
Keep proper footing and balance at all times. Do not use
on a ladder or unstable support.
15.
MAINTAIN TOOLS WITH CARE.
Keep tools sharp at all times, and clean for best
and safest performance. Follow instructions for lubricating and changing ac-
cessories.
16. DISCONNECT TOOLS.
When not in use, before servicing, or when changing at-
tachments, blades, bits, cutters. etc. all tools should be disconnected from
power supply.
17.
REMOVE ADJUSTING KEYS AND WRENCHES.
Form habit of checking to see
that keys and adjusting wrenches are removed from tool before turning it on.
18.
AVOID ACCIDENTAL STARTING. Don't carry plugged-in tools with finger on
switch. Be sure switch is off when plugging in.
19.
OUTDOOR USE EXTENSION CORDS.
When tool is used outdoors, use only
extension cords suitable for use outdoors. Outdoor approved cords are marked
with the suffix W-A, for example - SJTW-A or SJOW-A.
20.
KEEP BITS CLEAN AND SHARP.
Sharp bits minimize stalling and kickback.
21.
KEEP HANDS AWAY FROM DRILLING AREA.
Keep hands away from bits. Do
not reach underneath work while bit is rotating. Do not attempt to remove
material while bit is rotatin -
22.
NEVER USE IN AN
EXPLO IVE ATMOSPHERE.
Normal sparking of the motor
could ignite fumes.
23.
INSPECT TOOL CORDS PERIODICALLY and if damaged, have repaired at your
nearest Sears Repair Center.
24.
INSPECT EXTENSION CORDS PERIODICALLY
and replace if damaged.
25.
KEEP HANDLES DRY, CLEAN, AND FREE FROM OIL AND GREASE.
Always
use a clean cloth when cleaning. Never use brake fluids, gasoline, petroleum-
based products or any strong solvents to clean your tool.
26.
STAY ALERT.
Watch what you are doing and use common sense. Do not op-
erate tool when you are tired. Do not rush.
27.
CHECK DAMAGED PARTS.
Before further use of the tool, a guard or other part
that is damaged Should be carefully checked to determine that it will operate
properly and perform its intended function. Check for alignment of moving
parts, binding of moving parts, breakage of parts, mounting, and any other
conditions that may affect its operation. A guard or other part that is damaged
should be properly repaired or replaced by an authorized service center.
28.
DO NOT USE TOOL IF SWITCH DOES NOT TURN
IT
ON AND OFF.
Have defect-
ive switches replaced by an authorized service center.
29.
DRILLING INTO ELECTRICAL WIRING IN WALLS CAN CAUSE DRILL BIT AND
CHUCK TO BECOME ELECTRICALLY LIVE.
Do not touch the chuck or metal
housing when drilling into a wall; grasp only the insulated handle(s) provided on
the tool.
30.
Inspect for and remove all nails from lumber before drilling.
31. DRUGS,
ALCOHOL,
MEDICATION.
Do not operate tool while under the influ-
ence of drugs, alcohol, or any medication.
32.
WEAR HEARING PROTECTION DURING EXTENDED PERIODS OF OPERA-
TION.
PERA.
TION.
33.
SAVE THESE INSTRUCTIONS.
Refer to them frequently and use them to
Instruct third party users. If you loan someone this tool. loan them these
instructions also.
Page 3

TRIGGER
Fig. 1
..-CAP SCREW
A lL FORWARD
REVERSE -
VARIABLE SPEED
CONTROL SELECTOR
AUXILIARY HANDLE
'0' HANDLE
LOCK-ON BUTTON
The operation of any Drill can result in foreign objects being thrown into your
eyes, which can result in severe eye damage. Before commencing power tool
operation, always wear safety goggles or safety glasses with Side shields and
a full face shield when needed. We recommend Wide Vision Safety Mask for
use over spectacles or standard safety glasses with side shields, available at
Sears Catalog Order or Retail Stores.
ACAUTION:
Page 5
OPERATION
OPERATION (Cont.)
KNOW YOUR DRILL
Before attempting to use your drill, familiarize
yourself with all operating features and safety re-
quirements.
WARNING: DO NOT ALLOW FAMILIARITY
WITH YOUR DRILL TO MAKE YOU CARELESS.
REMEMBER
THAT A CARELESS FRACTION OF A
SECOND IS SUFFICIENT TO INFLICT
SEVEREIN-
JURY.
WARNING: ALWAYS WEAR SAFETY GLASSES
OR EYESHIELDS WHEN OPERATING YOUR
DRILL. FAILURE TO DO SO COULD RESULT IN
DUST, SHAVINGS, OR LOOSE PARTICLES BEING
THROWN INTO YOUR EYES, RESULTING IN
POSSIBLE SERIOUS INJURY.
REVERSIBLE
Your drill has the feature of being reversible. The
direction of rotation is controlled by a lever located
above the trigger switch. See Figure 1. With drill held
in normal operating position, the direction of rota-
lion lever should be positioned to the right of the
switch for drilling. The direction of rotation is revers-
ed when the lever is to the left of the switch. THE
DESIGN OF THE SWITCH WILL NOT PERMIT
CHANGING DIRECTION OF ROTATION WHILE
DRILL IS RUNNING. RELEASE THE SWITCH TRIG-
GER AND ALLOW THE DRILL TO STOP BEFORE
CHANGING ITS DIRECTION. NOTE: THE TOOL
WILL NOT RUN UNLESS THE SWITCH LEVER IS
PUSHED FULLY TO LEFT OR RIGHT.
INSTALLING AUXILIARY HANDLE
An auxiliary handle is packed with your drill for ease
of operation and to help prevent loss of control. To
install, insert the hex head cap screw through the
handle. Using a screwdriver, push on the head of the
cap screw in order to seat it Into the molded portion
of the handle. Next, start the threads into the thread-
ed hole on top of your drill and tighten securely. See
Figure 1.
LOCK-ON SWITCH
The switch of your drill is equipped with a lock-on'
feature for added utility and convenience when drill-
ing in soft woods or soft metals. To lock-on, simply
depress the trigger of the switch, push in the lock
button located on the side of the handle, then while
holding the lock button pushed in, release the trig-
ger.
To release the lock, depress the trigger and release
it. Do not lock the trigger on heavy jobs where the
drill may have to be stopped quickly.
BE SURE THE
TRIGGER IS NOT IN THE "LOCK-ON" POSITION
BEFORE CONNECTING TO POWER SUPPLY.
VARIABLE SPEED
Your drill has a variable speed control selector
designed to allow operator control of speed and tor-
que limits. See Figure 1.
To increase the speed and
torque of your drill, hold your drill in normal
operating position and turn the variable speed con-
trol selector clockwise. Turn counterclockwise to
decrease the speed and torque of your drill. If you
desire to lock the switch on at a given speed, pull the
trigger of the switch, push in the lock button located
on the side of the handle, then while holding the lock
button pushed in, release the trigger. Next, adjust
the variable speed control selector until the desired
speed is reached. NOTE: IF THE VARIABLE SPEED
CONTROL SELECTOR IS FULLY TURNED IN THE
COUNTERCLOCKWISE DIRECTION, YOUR DRILL
MAY NOT RUN.
IF YOU DESIRE NOTTO USETHE VARIABLE SPEED
CONTROL SELECTOR, TURN IT IN THE FULL
CLOCKWISE DIRECTION. THIS WILL ALLOW THE
SPEED
OF YOUR DRILL TO BE FULLY CONTROLL-
ED BY THE AMOUNT OF SWITCH TRIGGER
DEPRESSION.
INSTALLING BITS
1.
DISCONNECT YOUR DRILL FROM POWER
SUPPLY SOURCE.
2.
Insert drill bit into chuck jaws.
3.
Tighten chuck jaws securely, using the chuck key
provided.
DO NOT USE A WRENCH
TO TIGHTEN
OR LOOSEN THE CHUCK.
4.
Remove chuck key.
REMOVING BITS
1.
DISCONNECT YOUR DRILL FROM POWER
SUPPLY SOURCE.
2.
Loosen chuck jaws using the chuck key pro-
vided.
DO NOT USE A WRENCH
TO TIGHTEN OR
LOOSEN THE CHUCK.
3.
Remove drill bit from chock jaws.
4.
Remove chuck key.
DRILLING
See Figure 2.
1.
Depress and release the switch trigger to be sure
your drill is in the "Off' position before connect-
ing it to the power supply.
2.
Check the direction of rotation lever for correct
setting (forward or reverse).
See Figure 1.
3.
Secure the material to be drilled in a vise or with
clamps to keep it from turning as the drill bit
rotates.
4.
Plug your drill into power supply source.
5.
Hold your drill firmly and place the bit at the point
to be drilled.
6.
Depress the switch trigger to start your drill. Do
not lock the switch "On" for jobs where the drill
may need to be stopped suddenly.
7.
Move the drill bit into the workplace applying only
enough pressure to keep the bit cutting. Do not
force your drill or apply side pressure to elongate
a hole. Let your drill and bit do the work.
See
Figure 2.
When drilling hard smooth surfaces use a center
punch to mark desired hole location. This will pre-
vent the drill bit from slipping off center as the hole
is started. However, the variable speed feature
allows starting holes without center punching if
desired. To accomplish this, simply operate your
drill at a low speed until the hole is started.
When
When drilling metals use a light oil on the drill bit to
keep it from overheating. The oil will prolong the life
of the bit and increase the drilling action.
If the bit
tams
in workpiece or if the drill stalls, stop
the tool immediately. Remove the bit from the
workplace and determine the reason for lamming.
Avoid running the tool at low speeds for extended
periods of time. At lower speeds under constant
usage, the unit may become overheated. If this oc-
curs, operate the tool without load and at full speed
to cool it more quickly.
The following guidelines may be used in determin-
ing correct speed for various applications. Lower
speeds are ideal for starting holes without center
punching, paint mixing, drilling ceramics, as well as
other applications where minimum speed and power
is required. Medium speeds are for drilling ferrous
metals, plastics and laminates. Higher speeds pro-
duce best results in drilling wood, non-ferrous
metals such as aluminum as well as driving ac-
cessories which require high speeds and maximum
power.
Page

MALLET
CHUCK
Fig. 4
Fig. 5
LUBRICATION
All the bearings in this tool are lubricated with a sufficient amount of high grade lubricant for the life of the unit
under normal operating conditions, therefore, no further lubrication is required.
THE FOLLOWING RECOMMENDED ACCESSORIES ARE CURRENT AND WERE AVAILABLE AT THE TIME
THIS MANUAL WAS PRINTED.
MAINTENANCE

MAINTENANCE
WHEN SERVICING USE ONLY IDENTICAL REPLACEMENT PARTS.
BRUSH REPLACEMENT
CHUCK REMOVAL
Disconnect the drill from power supply before any
service Operation.
The chuck must be removed in order to use some ac-
cessories. To remove:
1. Close the chuck jaws. Insert chuck key into chuck
and tap sharply with a mallet in a clockwise
direction as shown in Fig. 3.
2. Open the chuck jaws and remove the chuck screw
by turning it in clockwise direction.
See Fig. 4,
NOTE:
The chuck screw has left hand threads.
3.
Insert the chuck key in chuck and tap sharply in
counterclockwise direction to loosen it on
spindle. It can now be unscrewed by hand. See
Fig.
5.
The chuck may become loose on spindle and
develop a wobble. To tighten it, follow these steps:
1.
Open the chuck jaws.
2.
Insert chuck key in chuck and tap with a mallet in
clockwise direction.
3.
Tighten the chuck screw. NOTE: The chuck screw
has left hand threads.
EXTENSION CORDS
The use of any extension cord will cause some loss
of power. To keep the loss to a minimum and to pre-
vent tool overheating, use minimum 16 A.W.G. wire
size for extension cord lengths from 251075 feet and
minimum 14 A.W.G. wire size for extension cord
lengths from 75 to 100 feet. When tool is used out-
doors, use Only extension cords suitable for outdoor
use and so marked. Extension cords are available at
Sears Catalog Order or Retail Store.
WARNING: CHECK EXTENSION CORDS
BEFORE EACH USE. IF DAMAGED, REPLACE IM-
MEDIATELY. NEVER USE TOOL WITH A DAMAG-
ED CORD SINCE TOUCHING THE DAMAGED
AREA COULD CAUSE ELECTRICAL SHOCK
RESULTING IN SERIOUS INJURY OR DEATH.
GENERAL
Only the parts shown on parts list, page eleven, are
intended to be repaired or replaced by the customer.
All other parts represent an important part of the
double insulation system and should be servied only
by a qualified service technician.
Avoid using solvents when cleaning plastic parts.
Most plastics are susceptible to various types of
commercial solvents and may be damaged by their
use. Use clean cloths to remove dirt, carbon dust,
etc.
AWARNING: DO NOT AT ANY TIME LET BRAKE
FLUIDS, GASOLINE, PETROLEUM-BASED PRO-
DUCTS, PENETRATING OILS, ETC. COME IN
CONTACT WITH PLASTIC PARTS. THEY CON-
TAIN CHEMICALS THAT CAN DAMAGE,
WEAKEN, OR DESTROY PLASTIC.
High Speed Bits (For Wood or metal)
Masonry Bits
Wood Boring Bits
Hole Saws
Cord Lock 9 2595
Wood Boring Bit Pilot Set 9 2588
Disconnect the drill from power supply before
servicing.
1.
Remove the brush caps (A) with screwdriver.
See
Fig. 6.
2.
Remove fibre washers (B). The washers are
designed to fit tightly in the brush holders to,
prevent twisting of brush springs when replacing
brush caps.
3.
Remove brushes (C).
4.
Reassemble new brush with spring into tool mak-
ing sure that the curvature of the brush matches
curvature of the motor and that the brush moves
freely in the brush holder.
5.
Replace fibre washers and brush caps.
When electric tools are used on fiberglass boats,
sports cars, etc., it hasbeen found that they are sub-
ject to accelerated wear and possible premature
failure, as the fiberglass chips and grindings are
highly abrasive to bearings, brushes, commutator,
etc. Consequently it is not recommended that this
tool be used for extended work on any fiberglass
material. During any use on fiberglass it is extremely
important that the tool is cleaned frequently by blow-
ing with an air jet. ALWAYS WEAR SAFETY
GOGGLES OR SAFETY GLASSES WITH
SIDESHIELDS BEFORE BEGINNING POWER TOOL
OPERATION OR BLOWING DUST.
Doweling Jig 14186
Drill Stand 9 25989
Wire Brushes, All
Carrying Case 9 1474
Chuck Key Holder 9 2978
½" Max.
3 / 4
" Max.
11,"
Max.
2½' Max.
CAUTION: The use of attachments or accessories not listed above might be hazardous.
Page 6

Page 7

CHUCK KEY
HOLDER
Fig. 7
Fig. 8
Fig. 9
NOTES
CRAFTSMAN CHUCK KEY HOLDER
1. Form first loop by forcing end with round holes through
slotted hole opposite end. See Figure 7.
2. Wrap the other end around cord, then force this loop
through small round hole to form second
loop. See Figure 8.
3. Pull second loop tight against cord.
4. Mount the chuck key by inserting handle through first
loop, around the bend and pull tight against gear shoulder.
See Figure 9.
NOTES
Page 8
Page 9

19
'S 
\
2021 22 21 20
25 24
17
CRAFTSMAN 1/2 INCH ELECTRIC DRILL - MODEL NUMBER 31 5.10280
SEE NOTE 'A" PAGE Ii
FOR PARTS LIST - SEE PAGE 11
Page 10
I
arnmirs I/& IlU..n CL.C%, I rut, IJFtILL -
MJIJL IVIVIDIi 310.
IUOU
The Modal Number will be found on a plate attached to the Cover
Housing. Always Mention the
Modal Number in all correspondence regarding your 1/2 INCH
ELECTRIC DRILL or when
ordering repair parts.
SEE BACK PAGE FOR PARTS ORDERING INSTRUCTIONS
PARTS LIST
Key  Pert
No.  Number 
Description 
Quan.
1 
990778-001  Logo Plate 
1
2  614008-001  Brush Cap  4
3 
706382.813  Washer 
2
4  610784-007  Brush With Spring
-  2
5  617595-004  Cap Screw (#3/8-24 x 1-1/2 Hex Hd.)

1
6 
612909.0 01
a d
! e
1
7 
607122.001 
Bearing  1
8  624087.002  Thrust Bearing 
1
9  611473.001 
Gear and Spindle Assembly  1
10 
620789.007  Washer  1
11 
606704.001  Bearing  1
12  611468.004 
Gear Cover with Bearings (Includes Key Nos. 11 &20)  1
13  617966.020 
Screw(#8-10 x 1-1/2 Pan Hd)  2
14  617517.001 
1/2" Chuck (Cat. No. 9-2980)  1
15  613150-003 
Screw (#5/16-24 x 7/5 Fil Hd., Left Hand)
 1
16 
617966-013 
Screw (#8-10 x 7/8 Pan Hd.)
 2
17  606858.000 
Chuck Key (Cat. No. 9-2059)  1
18  622943-000 
Chuck Key Holder (Cat. No. 92978)  1
19  624088002 
Thrust Washer

'2
20  623325-000 
Bearing 
2
21  931744.814 
Washer 
2
22  613031-001 
Pinion with Gear  11
23  990777-001 
Data Plate 
24  706382.823 
Washer 
1
25 
617205-006 
Screw (1/4-20 x 7/8 Pan Hd)  1
26 
616920001 
'0" Handle  1
612.547.249 
Owner's Manual (Not Illustrated)
NOTE: "A" - The assembly
chewy represents
an Important part Olin. Double
Insulated System. To avoid the possibility of
alteration or damage to the
System, service should be performed by your nearest
Sears Repair Center. Contact your nearest
Catalog Order or Retell Store.
Hardware Item
-
May Be Purchased Locally
-
Standard
Available From Div. 98
- Source 080.00
FOR ILLUSTRATION - SEE PAGE 10
age 11

CRAFTSMAN'
1/2 INCH ELECTRIC DRILL
OWNERS
MANUAL
SERVICE
MODEL NO.
315.10280
HOW TO ORDER
REPAIR PARTS
VARIABLE SPEED-REVERSIBLE
DOUBLE INSULATED
Now that you have purchased your Drill, should a
need ever exist for repair parts or service, simply
contact any Sears Service Center and most Sears.
Roebuck and Co. stores. Be sure to provide all perti-
nent facts when you call or visit.
The model number of your Drill will be found on the
plate attached to the motor housing.
WHEN ORDERING REPAIR PARTS, ALWAYS GIVE
THE FOLLOWING INFORMATION:
•
PART NUMBER 
• PART DESCRIPTION
• MODEL NUMBER  • NAME OF ITEM
315.10280 
Electric Drill
All parts listed may be ordered from any Sears Ser-
vice Center and most Sears stores.
If the parts you need are not stocked locally, your
order will be electronically transmitted to a Sears
Repair Parts Distribution Center for handling.
SEARS, ROEBUCK AND CO., Dept. 698/731A, Sears Tower, Chicago, IL 60684