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Model T31739 (Mfd. Since 11/19)

SECTION 2: POWER SUPPLY

Availability

Before installing the machine, consider the avail-
ability and proximity of the required power supply 
circuit.  If  an  existing  circuit  does  not  meet  the 
requirements for this machine, a new circuit must 
be installed. To minimize the risk of electrocution, 
fire,  or  equipment  damage,  installation  work  and 
electrical wiring must be done by an electrician or  
qualified service personnel in accordance with all 
applicable codes and standards.

Electrocution, fire, shock, 

or equipment damage 

may occur if machine is 

not properly grounded 

and connected to power 

supply.

Full-Load Current Rating

The  full-load  current  rating  is  the  amperage  a 
machine draws at 100% of the rated output power. 
On  machines  with  multiple  motors,  this  is  the 
amperage drawn by the largest motor or sum of all 
motors  and  electrical  devices  that  might  operate 
at one time during normal operations.

Full-Load Current Rating at 120V .... 5.1 Amps

The full-load current is not the maximum amount 
of amps that the machine will draw. If the machine 
is overloaded, it will draw additional amps beyond 
the full-load rating.

If the machine is overloaded for a sufficient length 
of time, damage, overheating, or fire may result—
especially  if  connected  to  an  undersized  circuit. 
To  reduce  the  risk  of  these  hazards,  avoid  over-
loading  the  machine  during  operation  and  make 
sure it is connected to a power supply circuit that 
meets the specified circuit requirements.

For your own safety and protection of 

property, consult an electrician if you are 

unsure about wiring practices or electrical 

codes in your area.

Note: Circuit requirements in this manual apply to 
a dedicated circuit—where only one machine will 
be running on the circuit at a time. If machine will 
be connected to a shared circuit where multiple 
machines may be running at the same time, con-
sult an electrician or qualified service personnel to 
ensure circuit is properly sized for safe operation.

A  power  supply  circuit  includes  all  electrical 
equipment between the breaker box or fuse panel 
in the building and the machine. The power sup-
ply circuit used for this machine must be sized to 
safely handle the full-load current drawn from the 
machine  for  an  extended  period  of  time.  (If  this 
machine  is  connected  to  a  circuit  protected  by 
fuses, use a time delay fuse marked D.)

120V Circuit Requirements

This  machine  is  prewired  to  operate  on  a  power 
supply circuit that has a verified ground and meets 
the following requirements:

Nominal Voltage .................... 110V, 115V, 120V

Cycle ..........................................................60 Hz

Phase ........................................... Single-Phase

Power Supply Circuit ......................... 15 Amps

Serious injury could occur if you connect 

machine to power before completing setup 

process. DO NOT connect to power until 

instructed later in this manual.

Summary of Contents for T31739

Page 1: ...NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL INC CS20663 PRINTED IN CHINA V1 01 20 MODEL T31739 12 VARIABLE SPEED BENCHTOP DRILL...

Page 2: ...g grinding tool integrity and the usage of personal protective equipment The manufacturer will not be held liable for injury or property damage from negligence improper training machine modifications...

Page 3: ...ION 4 OPERATIONS 20 Operation Overview 20 Choosing Spindle Speeds 21 Changing Spindle Speed 22 Installing Removing Chuck Arbor 22 Installing Removing Drill Bits 24 Using LED Worklight 24 Adjusting Dep...

Page 4: ...ade every effort to be exact with the instruc tions specifications drawings and photographs in this manual Sometimes we make mistakes but our policy of continuous improvement also means that sometimes...

Page 5: ...p Depth Stop Scale Emergency Stop Button Quill Digital Readout Downfeed Handle Spindle Return Spring Rack Workpiece Support Spindle Speed Lever Table Pivot Lock Handle Table Height Lock Handle Table H...

Page 6: ...ontrol Panel Figure 3 Control panel Emergency Stop Button Immediately cuts power to motor and control panel when pressed Twist button clockwise to reset ON OFF Buttons Turns drill press ON and OFF LED...

Page 7: ...t 30 x 20 x 12 in Electrical Power Requirement 120V Single Phase 60 Hz Full Load Current Rating 5 1A Minimum Circuit Size 15A Connection Type Cord Plug Power Cord Included Yes Power Cord Length 6 ft P...

Page 8: ...r To Table Height 8 7 8 18 7 8 in Construction Table Precision Ground Cast Iron Column Steel Spindle Housing Cast Iron Head Cast Iron Base Cast Iron Paint Type Finish Powder Coated Other Related Infor...

Page 9: ...d proof DANGEROUS ENVIRONMENTS Do not use machinery in areas that are wet cluttered or have poor lighting Operating machinery in these areas greatly increases the risk of accidents and injury MENTAL A...

Page 10: ...moving parts or flying debris Make sure they are properly installed undamaged and working correctly BEFORE operating machine FORCING MACHINERY Do not force machine It will do the job safer and better...

Page 11: ...workpiece Always inspect bits cutting tools for sharpness chips or cracks before each use Replace dull chipped or cracked bits cutting tools immediately EYE FACE HAND PROTECTION Flying chips created b...

Page 12: ...rsized circuit To reduce the risk of these hazards avoid over loading the machine during operation and make sure it is connected to a power supply circuit that meets the specified circuit requirements...

Page 13: ...ord size gets longer and the gauge size gets smaller higher gauge numbers indicate smaller sizes Any extension cord used with this machine must be in good condition and contain a ground wire and match...

Page 14: ...ou are completely satisfied with the machine and have resolved any issues between Grizzly or the shipping agent You MUST have the original pack aging to file a freight claim It is also extremely helpf...

Page 15: ...nd inventory them If any non proprietary parts are missing e g a nut or a washer we will gladly replace them or for the sake of expediency replacements can be obtained at your local hardware store Box...

Page 16: ...14 Model T31739 Mfd Since 11 19 Hardware Recognition Chart USE THIS CHART TO MATCH UP HARDWARE DURING THE INVENTORY AND ASSEMBLY PROCESS 5mm 5mm Flat Head Cap Screw...

Page 17: ...ust preventative with a liberal amount of cleaner degreaser then let it soak for 5 10 minutes 3 Wipe off the surfaces If your cleaner degreas er is effective the rust preventative will wipe off easily...

Page 18: ...e in place Machine Base Workbench Hex Bolt Flat Washer Flat Washer Lock Washer Hex Nut Figure 7 Through Mount setup Number of Mounting Holes 4 Diameter of Mounting Hardware Needed 1 2 Assembly To asse...

Page 19: ...s that secure headstock to column x 2 6 Attach table height crank handle to table arm see Figure 13 and secure by tightening pre installed set screw against worm shaft Figure 13 Table height crank han...

Page 20: ...tely into chuck 3 Insert small end of arbor into chuck 4 Hold assembly by the arbor and tap chuck onto a block of wood with medium force as illustrated below Joining Drill Chuck Arbor Figure 19 Tappin...

Page 21: ...e to power by inserting power cord plug into a matching receptacle Note The speed digital readout will not illuminate until Step 4 is completed 4 Twist Emergency Stop button clockwise until it springs...

Page 22: ...ks magazines or get formal training before beginning any proj ects Regardless of the content in this sec tion Grizzly Industrial will not be held liable for accidents caused by lack of training Keep h...

Page 23: ...inum Mild Steel 3 8 1 2 1200 1000 5 8 1 800 600 Using Drill Bit Speed Chart The chart shown in Figure 21 is intended as a generic guide only Always follow the manufac turer s speed recommendations if...

Page 24: ...Speed Lever Speed Digital Readout Usually once the chuck and arbor have been properly mounted together they are considered semi permanent connections If you would like to install a different chuck we...

Page 25: ...y slot is exposed in side of quill see Figure 24 Drift Key Slot Figure 27 Using drift key to remove arbor from spindle 7 Tap drift key with a metal hammer see Figure 27 until chuck releases 8 Hold dow...

Page 26: ...it will not come loose during operation With a keyless chuck like the one that comes on the T31739 no chuck key is necessary for tightening or loosening Installing Removing Drill Bits Installing a Dri...

Page 27: ...ble to desired position then re tighten pivot lock handle 1 Loosen table height lock handle shown in Figure 30 2 Adjust table height by rotating table height crank handle see Figure 30 then re tighten...

Page 28: ...ging workpiece thickness DO NOT look directly into laser Severe eye injury will result To adjust lasers 1 DISCONNECT MACHINE FROM POWER 2 Install drill bit in chuck see Installing Removing Drill Bits...

Page 29: ...ing The 135 split point enables the drill to use less thrust and eliminates the tendency of the drill point to walk which makes these great for use in portable drills or drill presses Cobalt Alloy bit...

Page 30: ...ssolving cleaner to remove it Protect the unpainted cast iron table by wiping it clean after every use this ensures moisture from wood dust does not remain on bare metal surfaces Keep the table rust f...

Page 31: ...use a brush to apply a thin coat of grease to the rack teeth then fully raise lower quill and table to distribute grease Note Apply oil to the quill smooth outside surface that was removed during the...

Page 32: ...cutter 4 Belt slipping 5 Machine undersized for task 6 Motor overheated 7 Pulley slipping on shaft 8 Motor at fault 1 Use correct bit cutter for task 2 Decrease feed rate cutting speed Page 22 3 Sharp...

Page 33: ...ack 1 Replace increase return spring tension Page 35 2 Clean and lubricate spindle quill rack Drill bit drifts 1 Dull incorrectly sharpened drill bit 2 Tool bit chuck incorrectly installed 1 Correctly...

Page 34: ...on ON and adjust spindle speed lever to lowest speed setting Note Belt tension cannot be reapplied with out spindle turning 3 Open belt cover 2 Adjust spindle speed lever fully for ward to highest spe...

Page 35: ...nel cover and close belt cover 8 Refer to Adjusting Laser on Page 26 to secure and adjust laser Replacing Laser Laser Cord 1 of 2 Laser Switch Crimp Wire Connector 4 Remove control panel cover Find wh...

Page 36: ...ight cord wires connect to worklight switch and crimp wire connector see Figure 53 5 Replace old worklight wires with new work light wires and feed new worklight back through headstock and worklight h...

Page 37: ...ct inju ries could occur Always wear heavy leather gloves and safety glasses when adjusting the return spring tension Items Needed Qty Heavy Leather Gloves 1 Pair Safety Glasses 1 Pair Shop Rags As Ne...

Page 38: ...urrent at the time of printing but may not match your machine If you find this to be the case use the wiring diagram inside the motor junction box CAPACITORS INVERTERS Some capacitors and power invert...

Page 39: ...Ground CONTROL PANEL GORBO XCK 017 DKLD CB07 6A ON OFF Switch LAY5 BE102 2 1 2 1 1 2 3 4 Neutral Hot Ground 120 VAC 5 15 Plug 120V MOTOR MOTOR JUNCTION BOX Run Capacitor 25uF 250VAC DKLD 1801 1W 3 5V...

Page 40: ...54 25 55 26 56 27 57 28 58 59 60 99 101 102 103 104 105 106 1 2 3 4 5 6 7 8 9 10 11 12 14 15 7 8 16 17 18 19 20 22 62 33 63 34 64 35 36 37 31 78 2 78 1 78 3 78 4 78 6 78 5 78 7 107 108 109 110 113 11...

Page 41: ...31739028 BALL BEARING 6201ZZ 78 7 PT31739078 7 MOTOR CORD 3G 3W 39 29 PT31739029 CLAMP BOLT M12 1 75 X 2 79 PT31739079 HEX NUT M10 1 5 30 PT31739030 COMPRESSION SPRING 1 2 X 6 80 PT31739080 KEY 4 X 4...

Page 42: ...jewelry or gloves to prevent getting caught in moving parts To reduce risk of death or serious injury read manual BEFORE using machine To get a new manual call 800 523 4777 or go to www grizzly com W...

Page 43: ...for incidental contingent special or consequential damages arising from the use of our products The manufacturers reserve the right to change specifications at any time because they constantly strive...

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