
INSTRUCTIONS FOR:
PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS & CAUTIONS. USE
THE PRODUCT CORRECTLY AND WITH CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE DAMAGE AND/OR
PERSONAL INJURY AND WILL INVALIDATE THE WARRANTY. KEEP THESE INSTRUCTIONS SAFE FOR FUTURE USE.
RADIAL PILLAR DRILLS
MODEL No’s: GDM790BR & GDM1630FR
Thank you for purchasing a Sealey product. Manufactured to a high standard, this product will, if used according to these instructions,
and properly maintained, give you years of trouble free performance.
Refer to
instructions
Wear eye
protection
Wear protective
gloves
Wear safety
footwear
Wear a mask
Indoor use only
1. SAFETY
1.1. ELECTRICAL SAFETY
WARNING! It is the user’s responsibility to check the following:
Check all electrical equipment and appliances to ensure that they are safe before using. Inspect power supply leads, plugs and all
electrical connections for wear and damage. Sealey recommend that an RCD (Residual Current Device) is used with all electrical
products. You may obtain an RCD by contacting your local Sealey dealer. If the product is used in the course of business duties, it
must be maintained in a safe condition and routinely PAT (Portable Appliance Test) tested.
Ensure that the insulation on all cables and on the appliance is safe before connecting it to the power supply.
1.1.1. Regularly inspect power supply cables and plugs for wear or damage and check all connections to ensure that they are secure.
1.1.2. Important: Ensure that the voltage rating on the appliance suits the power supply to be used and that the plug is tted with the correct
fuse - see fuse rating in these instructions.
8 DO NOT pull or carry the appliance by the power cable.
8 DO NOT pull the plug from the socket by the cable.
8 DO NOT use worn or damaged cables, plugs or connectors. Ensure that any faulty item is repaired or
replaced immediately by a qualied electrician.
1.1.3. This product is tted with a BS1363/A 13 Amp 3 pin plug.
If the cable or plug is damaged during use, switch the electricity supply and remove from use.
Ensure that repairs are carried out by a qualied electrician.
Replace a damaged plug with a BS1363/A 13 Amp 3 pin plug. If in doubt contact a qualied electrician.
A) Connect the GREEN/YELLOW earth wire to the earth terminal ‘E’.
B) Connect the BROWN live wire to the live terminal ‘L’.
C) Connect the BLUE neutral wire to the neutral terminal ‘N’.
Ensure that the cable outer sheath extends inside the cable restraint and that the restraint is tight.
Sealey recommend that repairs are carried out by a qualied electrician.
1.2. GENERAL SAFETY
p WARNING! Disconnect drill from mains power before changing accessories, servicing or performing any maintenance.
3 Maintain the drill in good condition (use an authorised service agent).
p WARNING! Keep all guards and holding screws in place, tight and in good working order. Check regularly for damaged parts.
A guard or any other part that is damaged must be repaired or replaced before the tool is next used, to ensure that it will
operate properly and perform its intended function. The safety guard is a mandatory fitting where drill is used in premises
covered by the Health & Safety at Work Act.
3 Check alignment of moving parts and check for possible broken parts.
3 Replace or repair damaged parts. Use genuine Sealey parts only. Non-authorised parts may be dangerous and will invalidate the
warranty.
3 Ensure the set screws of the head frame are screwed tight before using the drill.
3 Secure the drill to the bench/floor to avoid the machine tipping, sliding or walking. Drill is designed for use with drill bits only. No other
accessory may be used.
3 Ensure the chuck is securely fastened to the spindle.
3 Remove adjusting keys and wrenches from the machine and working area before switching on.
3 Use clamps or a vice (not included) to secure the workpiece. Available from your Sealey stockist. DO NOT secure the workpiece by
hand.
3 Refer to speed chart for recommended drilling speeds.
p WARNING! Always wear approved eye or face protection when operating this drill. Use a dust mask if dust is generated.
p WARNING! DO NOT wear gloves when drilling.
3 Others in the workplace should be kept at a safe distance from the drill, especially when it is in operation.
3 Keep the work area as childproof as possible by using padlocks and master switches.
3 Keep drill bits clean and sharp for best and safest performance.
3 Remove ill fitting clothing. Remove ties, watches, rings and other loose jewellery and contain long hair.
3 Locate the drill in a suitable work area, keep area clean and tidy and free from unrelated materials. Ensure there is adequate lighting.
3 Maintain correct balance and footing. Ensure the floor is not slippery and wear non-slip shoes.
3 Avoid unintentional starting.
7 DO NOT use drill for a task it is not designed to perform.
7 DO NOT allow untrained persons to operate the drill.
Replacement fuse rating:
13A
© Jack Sealey Limited
Original Language Version
GDM790BR,GDM1630FR Issue; 6(S) - 07/02/18

7 DO NOT get the drill wet or use in damp or wet locations or areas where there is condensation.
7 DO NOT operate the drill if damaged.
7 DO NOT use drill in an area where paint fumes, solvents or flammable liquids pose a potential hazard. Keep flammable material away
from the drill when operating. Flammable waste, such as wipes or cleaning rags, must be placed in a closed metal container and
disposed of correctly.
7 DO NOT exceed the rated capacity of the drill.
7 DO NOT operate the drill if any parts are missing as this may cause failure and/or personal injury.
7 DO NOT leave the drill operating unattended.
7 DO NOT operate the drill when you are tired, under the influence of alcohol, drugs or intoxicating medication.
3 When not in use switch off the drill, remove plug from the power supply and DO NOT leave until the tool has come to a complete stop.
2. INTRODUCTION
Heavy-duty construction. Safety devices tted include a no-volt release switch and pulley cover cut-out microswitch. Radial feature allows off-
table drilling and angle drilling. Features a maximum throat depth of 420mm. Radial arm controlled by rack and pinion assembly allowing ne
positioning of drill bit. Available as bench mounting or oor standing type.
3. SPECIFICATION
Model No:.................................... GDM790BR..............GDM1630FR
Drilling Capacity (Chuck Size): .................... 16mm ....................... 16mm
Spindle Nose Taper: ............................ MT2...........................MT2
Maximum Distance Spindle Centre to Column:........420mm ..................... 420mm
Radial Arm Travel:..............................285mm ..................... 285mm
Spindle Travel: ................................80mm ....................... 80mm
Number of Speeds: .............................5 ............................... 5
Speed Range: .................................500-2450rpm.............500-2450rpm
Working Table Surface Size: ......................Ø310mm . . . . . . . . . . . . . . . . . . . Ø310mm
Working Base Surface Size: ...................... 160 x 180mm............ 210 x 190mm
Overall Base Size:..............................345 x 215mm............420 x 250mm
Column Diameter: ..............................60mm ....................... 70mm
Collar Diameter: ............................... 60mm .......................60mm
Overall Height: ................................820mm .................... 1630mm
Motor Power (Start): ............................ 350W (550W) ............. 350(550W)
Supply: ...................................... 230V .........................230V
Weight: ...................................... 43kg ......................... 59kg
Optional Keyless Chuck 16mm: ...................GDMX/KC .................GDMX/KC
4. CONTENTS Check parts against the list below.
If any items are damaged or missing contact your supplier.
3 Head Assembly 3 Column with Flange 3Rack & Rack Ring
3 Base 3 Table 3Table Arm, Bracket and Worm Gear
3Adjusting Handle (table) 3 Feed Handles and Knobs (3) 3Pivoted Clamp Bolts (4 - GDM790BR, 5 - GDM1630FR)
3 Chuck and Key 3 Safety Guard 3Bolts (4)
3 Hex. Keys (2) & Wedge 3Belt 3Locking Shoe
3 Coach Bolts & Wing Nuts
5. ASSEMBLY Ca
fig.1
Notes: 1) Diagrams are illustrative and may differ in detail from your drill.
2) Numbers in brackets refer to item numbers in the Parts List and Diagram
5.1. Assembly
5.1.1. Place the column (4) on the base (2), align holes and secure with the bolts (5) provided.
5.1.2. Insert worm gear (9) into table bracket, meshing it with the lift gear (7) (fig.1).
5.1.3. Fit table bracket (6) onto column (4) together with rack (15) (fig.2), engaging gear (7) in bracket with rack.
5.1.4. Install the rack collar (93) and tighten set screw (94) firmly (fig.3).
5.1.5. Fit the table adjusting handle (10) (fig.3.A) and lock handle (14) (fig.3.B).
5.1.6. Tighten the adjusting handle set screw (11) onto the flat on the worm gear shaft (9).
5.1.7. Install the table (16) and table lock handle (14) (fig.4).
5.1.8. Ensure that the column head assembly (83) is approximately midway between the motor (69) and the spindle housing (25) and then
insert locking shoe (88) into column head (84) (fig.5).
5.1.9. Place the head assembly over the column (4) and slide column head (84) down onto column. Tighten lock handles (fig.6).
p WARNING! If the column head assembly is not positioned midway there is a risk that the whole drill assembly may become
unstable when the head assembly is fitted.
5.1.10. Screw the three feed handles and knobs (37/38) into the hub (35) of the pinion shaft.
fig.2
fig.3
fig.4
© Jack Sealey Limited
Original Language Version
GDM790BR,GDM1630FR Issue; 6(S) - 07/02/18