Grizzly T31566 User manual

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MODEL T31566
ALL-SWIVEL
HD MOBILE BASE
INSTRUCTIONS
COPYRIGHT © AUGUST, 2019 BY GRIZZLY INDUSTRIAL, INC.
NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
(FOR MODELS MFD. SINCE 08/19) #AI20552 PRINTED IN CHINA V1.08.19
Introduction
Your new Heavy-Duty Mobile Base is designed to
give you a stable and mobile platform upon which
to mount machinery and equipment.
Operating machinery on an unsecured
mobile base may allow the machine to
shift unexpectedly, which could result in
accidental contact with a cutting device or
other moving parts.
Description Qty
A. Right Corner Brackets ................................ 2
B. Left Corner Brackets .................................. 2
C. 21" Side Rails ............................................. 4
D. 3" Swivel Casters ....................................... 4
E. Foot Pedals ................................................ 4
F. Compression Springs ................................. 4
G. Foot Pedal Plungers ................................... 4
H. Adjustable Rubber Feet .............................. 4
I. Shoulder Bolts M8-1.25 x 50 ...................... 4
J. Hardware (Not Shown)
—Hex Bolts M8-1.25 x 16......................... 32
—Lock Nuts M8-1.25 ................................ 20
—Hex Nuts M10-1.5 ................................... 4
Inventory
Specifications
• Minimum Inside Dimensions .......... 19" x 21"
• Maximum Inside Dimensions . . 291⁄2" x 291⁄2"
• Maximum Weight Capacity ............. 900 lbs.
Tools Needed for Assembly
• Open-End Wrench or Socket 13mm .......... 1
• Open-End Wrench or Socket 14mm .......... 1
• Open-End Wrench 17mm ........................... 1
• Measuring Tape .......................................... 1
Figure 1. Inventory.
B
AB
D
G
E
A
F
HI
C

-2- T31566 Mobile Base (Mfd. Since 08/19)
Preparation for Assembly
There is more than one way to assemble the
mobile base. Each method has advantages and
disadvantages, depending on the size and weight
of the machine that you plan to put on the mobile
base. The purpose of this section is to help you
decide which method will work best for your
situation.
If the machine can be lifted, the easiest method
is to assemble the mobile base according to the
dimensions of your machine, and then lift and
place the machine on the corner bracket plates
of the mobile base (see Figure 2). Proceed to
Assembling Base & Mounting Machine on
Page 3 if your machine fits this situation.
Note: Anything extending or opening outward with
a 3" high band around the base of the machine
(see Figure 3) may interfere with the installation
of the machine on the base, so be sure to account
for that prior to assembly.
Figure 3. Example of 3" high band around
machine base.
3"
If the machine is top heavy or has a narrow base
(such as a drill press), there is an increased risk of
tipping when moving it around on a mobile base.
To reduce the risk, a mounting base plate should
be used between the mobile base and machine.
Proceed to Making a Base Plate on Page 9 if
your machine fits this situation.
If the machine is too heavy to lift into position
on the mobile base, then the base can be built
around the machine. Proceed to Assembling
Base Around Machine on Page 4 for instructions
on how to build the base around the machine.
Figure 2. One of four corner brackets.
Plate
Corner
Bracket
Lifting heavy machinery
or parts without proper
assistance or equipment
may result in strains, back
injuries, crushing injuries,
or property damage.
Before moving machine and mobile base,
check to make sure pathway is clear of
any hoses, wires, tools or shop debris. An
abrupt impact with an object along path of
travel can lock a wheel and cause machine
to fall over, resulting in serious personal
injury. Disconnect machine from power
supply or dust collection before moving.
To avoid serious personal injury, keep
hands and fingers clear of machine base
and mobile base pinch points when placing
machine.

T31566 Mobile Base (Mfd. Since 08/19) -3-
3. Attach foot pedal to each front corner bracket
using (1) M8-1.25 x 50 shoulder bolt and (1)
M8-1.25 lock nut (see Figure 6).
Assembling Mobile Base
Figure 6. Attaching foot pedals.
Foot
Pedal
1. Attach swivel caster to each corner bracket
with (4) M8-1.25 x 16 hex bolts and (4)
M8-1.25 lock nuts (see Figure 4).
Figure 4. Swivel caster attached to bracket.
Swivel
Caster
2. Install foot pedal plunger and spring into each
corner bracket (see Figure 5), and attach a
rubber foot (with M10-1.5 hex nut) to the bot-
tom of each foot pedal plunger.
Figure 5. Installing foot pedal plunger and
spring.
Foot Pedal
Plunger
Spring
Rubber
Foot
Corner
Bracket
4. Measure machine base footprint size.
5. Arrange corner brackets in desired orienta-
tion. Choose orientation to ensure safe clear-
ance around base of machine, as well as
desired placement within shop.
6. Slide corner brackets over ends of side rails
(see Figure 7). Position corner brackets so
inside opening is 1⁄4"–
1⁄2" larger than both
width and length of machine base footprint.
Front
Figure 7. Example of assembled mobile base
with inside opening slightly larger than machine
base to ensure easy fit.
Inside
Opening
Left Corner
Bracket
Right Corner
Bracket

-4- T31566 Mobile Base (Mfd. Since 08/19)
8. With the help of an assistant, or proper lifting
equipment, lift and position machine inside
mobile base (see Figure 9).
Figure 9. Example of machine properly placed
inside mobile base.
9. Verify machine is properly seated on mobile-
base corner pads, it is free of wobbles, and
there is no deflection in mobile base.
— Deflection: If any deflection exists, verify
all fasteners are securely tightened and
mobile base is properly assembled. If
this does not solve the problem, verify
machine does not exceed the rated weight
limit listed in Specifications on Page 1.
— Wobbles: Wobbles can easily be elimi-
nated by placing an appropriately sized
shim between machine and mobile base
where needed.
If your machine is oddly shaped or too heavy to
lift into the mobile base, you can assemble the
mobile base around your machine as an alternate
option for assembly. Always have an assistant
stabilize the machine during assembly.
Assembling Base Around Machine
Items Needed Qty
Additional Person .............................................. 1
Open-End Wrench 13mm .................................. 1
Socket Wrench 13mm ....................................... 1
12" 4x4 Block ..................................................... 1
12" 2x4 Block ..................................................... 1
To assemble mobile base around machine:
1. Install foot pedal plunger and spring into each
corner bracket (see Figure 10), and attach a
rubber foot (with M10-1.5 hex nut) to the bot-
tom of each foot pedal plunger.
Figure 10. Installing foot pedal plunger and
spring.
Spring
Rubber
Foot
Foot Pedal
Plunger
7. Secure each end of corner brackets with (2)
M8-1.25 x 16 hex bolts (see Figure 8).
Figure 8. Securing corner bracket with both hex
bolts.
Hex
Bolts
Side
Rail
BOTH hex bolts must be secured against
side rail in each end of corner brackets. DO
NOT load machine onto mobile base until all
bolts have been firmly tightened. Improper
tightening or only using one bolt can result
in collapse or tipping when moving machine
around later, which could result in crushing
injury or property damage.

T31566 Mobile Base (Mfd. Since 08/19) -5-
2. Attach each foot pedal to corner bracket
with (1) M8-1.25 x 50 shoulder bolt and (1)
M8-1.25 lock nut (see Figure 11).
Figure 11. Attaching foot pedals.
Foot
Pedal
x 2
Figure 13. Rail secured to corner brackets.
x 2
3. Insert one side rail into the two front brackets,
as shown in Figure 12, then slide the bracket
assembly against the side of machine that
will typically be pushed against when moving
the machine.
Figure 12. Rail inserted between corner
brackets.
Corner Brackets
with Rubber Feet
Side Rail
4. Secure each end of rail to front brackets
with (2) M8-1.25 x 16 hex bolts, as shown in
Figure 13.
5. Slide other side rails into front brackets from
Step 4. Secure rails to front brackets with (4)
M8-1.25 x 16 hex bolts, as shown in Figure
14.
Figure 14. Rails fastened to brackets (machine
removed for clarity).
x 4
6. While an assistant lifts one side of the
machine, slide rail-bracket assembly from
Step 5 under machine, as shown in Figure 15.
Note: It may be necessary to adjust position
of rails once machine is on base assembly.
Side rails may be cut down to accommodate
machines with smaller footprints. However,
reducing length of mobile base decreases
stability and increases likelihood of tipping.
Base plates should be constructed for tall or
top-heavy machines (see Page 9).
Figure 15. Rail-bracket assembly placed under
front of machine.
Rail-Bracket
Assembly

-6- T31566 Mobile Base (Mfd. Since 08/19)
13. Attach swivel casters to each front bracket
with (4) M8-1.25 x 16 hex bolts and (4)
M8-1.25 lock nuts (see Figure 16).
Note: There is limited space when install-
ing fasteners inside the bottom of the caster
wheels.
7. Attach swivel casters to each rear bracket
with (4) M8-1.25 x 16 hex bolts and (4)
M8-1.25 lock nuts (see Figure 16).
Note: There is limited space when install-
ing fasteners inside the bottom of the caster
wheels.
Figure 16. Swivel caster attached to corner
bracket.
Swivel
Caster
Lock Nut
(1 of 4)
Hex Bolt
(1 of 4)
10. Secure rail to rear brackets with (4) M8-1.25
x 16 hex bolts, as shown in Figure 18.
Figure 19. 2x4 Placed beneath machine and
mobile base frame.
12" 2x4
8. With the help of an assistant, lift rear side
of machine, then place a 2x4 block under
machine (see Figure 17).
9. Slide each of the rear brackets onto remain-
ing side rail, and slide assembly into rail-
bracket assembly from Step 6. Adjust fit until
rail-bracket assembly rests against machine
body (see Figure 17).
Figure 17. Rear brackets and rail placed around
back of machine, which is raised up with a wood
block.
12" 2x4
11. With the help of an assistant, shift machine to
remove 2x4 block.
12. With the help of an assistant, tilt machine,
and insert a 2x4 block beneath machine and
mobile base frame (see Figure 19).
Note: Use caution when tilting machine sup-
ported on casters.
Figure 18. Remaining rail-bracket assembly
secured.
x 4

T31566 Mobile Base (Mfd. Since 08/19) -7-
14. With the help of an assistant, tilt machine and
remove 2x4 block from beneath machine and
mobile base frame, and set machine on the
floor.
Note: When moving the mobile base, the rub-
ber feet should not touch the floor. Likewise,
when operating the machine, ensure that the
rubber feet are fixed firmly against the floor to
provide stability.
Adjusting Rubber Feet
The height of the rubber feet can be adjusted
to stabilize the machine. To ensure the machine
does not move during operations, always make
sure the adjustable rubber feet (see Figure 20)
are firmly touching the ground before operating
the machine.
Tool Needed Qty
Open-End Wrench 17mm .................................. 1
To adjust rubber foot height:
1. Loosen hex nut on each foot to allow foot
(see Figure 20) to move up or down as
needed.
Figure 21. Foot pedal raised.
Foot Pedal
IMPORTANT: When moving the mobile base, the
rubber feet should not touch the floor. Likewise,
when operating the machine, ensure that the rub-
ber feet are fixed firmly against the floor to provide
stability, without lifting casters.
Figure 20. Rubber foot and hex nut adjustment.
Rubber Foot
Hex
Nut
4. Raise foot pedals up to lift rubber feet and
move machine (see Figure 21).
2. With all casters on the ground, lower each
foot to firmly touch the ground without lifting
caster.
3. Tighten hex nut on each foot.

-8- T31566 Mobile Base (Mfd. Since 08/19)
Using Mobile Base
1. DISCONNECT MACHINE FROM POWER!
2. With machine mounted on mobile base, lift
foot pedals to raise rubber feet. If needed,
adjust feet further to ensure feet do not drag
during move. Refer to Adjusting Rubber
Feet on Page 7 for details.
— If floor is uneven, retract feet completely to
eliminate the chance of the pads dragging.
3. Check to make sure machine pathway is
clear of all obstructions.
4. Push machine from lowest possible point to
avoid tipping it over, and move it to its new
location. The best control is usually achieved
by pushing from swivel caster side of base.
— If the machine is large, get an assistant to
help stabilize the machine while it is being
moved.
5. Adjust each foot until it touches floor, then
rotate each foot so it firmly presses against
ground without raising casters.
6. Check machine to make sure it is stable in
its new location, and make sure machine is
clear of any obstructions before reconnecting
power and turning machine ON.
To reduce risk of serious injury when using
this mobile base:
1. LOCKING FEET. Do not operate machine
on mobile base unless all mobile base feet
firmly contact floor. Using the machine on
base when it is not secured could result in
a loss of workpiece control.
2. MACHINE STABILITY. Test for stability
after placing the machine in its new location.
Adjust feet so they all touch the ground,
then push on machine at several locations,
making sure it is not off balance. The hex
nuts can be adjusted up to top of foot
assembly to lock foot height setting.
Before moving machine and mobile base,
check to make sure pathway is clear of
any hoses, wires, tools or shop debris. An
abrupt impact with an object along path of
travel can lock a wheel and cause machine
to fall over, resulting in serious personal
injury. Disconnect machine from power
supply or dust collection before moving.

T31566 Mobile Base (Mfd. Since 08/19) -9-
4. Lower rubber feet to keep mobile base from
moving (see Page 7).
5. With help from an assistant, place machine
on base plate.
6. Position machine stand close to front or cen-
ter of mobile base, so mobile base will not be
a tripping hazard.
7. Drill holes through base plate and secure
machine with through bolts, flat washers, lock
washers, and hex nuts (see Figure 23).
Note: There is limited space underneath
base plate, which can make it difficult to
tighten fasteners. If needed, insert bolts from
below and fasten washers and nuts from
above.
Figure 23. Example of drill press mounted to a
base plate.
Making a Base Plate
If the footprint of the machine is too small for the
mobile base or the machine doors or fixtures do
not clear the side rails, you can mount it to a base
plate, as shown in Figure 22.
A good quality base plate can increase the stan-
dard footprint of machines, such as drill presses,
to make them more stable. The base plate should
be approximately 3⁄4" thick and made of plywood
(do not use OSB, MDF, or particle board) to hold
the weight of the machine.
Needed Materials for Base Plate Qty
• Plywood 3⁄4" x Base Width x Base Length . . 1
• Hex Bolts 5⁄16" x 1-1⁄4" .................................. 4
• 5⁄16" Hex Nuts .............................................. 4
• 5⁄16" Lock Washers ...................................... 4
• 5⁄16" Flat Washers ........................................ 8
Base
Plate
Mobile
Base
Metal
Plate
Mounting
Holes
Figure 22. Example of mounting plywood base
plate to mobile base.
To make and use base plate:
1. Place plywood base plate on assembled
mobile base (see Page 3 for assembly
instructions).
2. Drill 3⁄8" holes through base plate and
bracket plates at each corner of mobile base.
3. Secure base plate to mobile base with 5⁄16"
hex bolts, hex nuts, flat washers, and lock
washers, as shown in Figure 22.

-10- T31566 Mobile Base (Mfd. Since 08/19)
BUY PARTS ONLINE AT GRIZZLY.COM!
Scan QR code to visit our Parts Store.
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T31566 Parts Breakdown & List
REF PART # DESCRIPTION REF PART # DESCRIPTION
1 PT31566001 RAIL 21" 7 PT31566007 FOOT PEDAL PLUNGER 17MM
2 PT31566002 RI GHT CORNER BRACKET 8 PT31566008 COMPRESSION SPRING 22 X 1.5 X 61
3 PT31566003 LEFT CORNER BRACKET 9 PT31566009 HEX NUT M10-1. 5
4 PT31566004 CASTER, 3" SWIVEL 10 PT31566010 ADJUSTABLE FOOT M10-1.5 X 30
5 PT31566005 FOOT PEDAL 11 PT31566011 LOCK NUT M8-1.25
6 PT31566006 SHOULDER BOLT M8-1.25 X 8, 8 X 50 12 PT31566012 HEX BOLT M8-1.25 X 16
Please Note: We do our best to stock replacement parts whenever possible, but we cannot guarantee that all parts shown here
are available for purchase. Call [phone] or visit our online parts store at www.grizzly.com to check for availability.

WARRANTY & RETURNS
Grizzly Industrial, Inc. warrants every product it sells for a period of 1 year to the original purchaser from
the date of purchase. This warranty does not apply to defects due directly or indirectly to misuse, abuse,
negligence, accidents, repairs or alterations or lack of maintenance. This is Grizzly’s sole written warranty
and any and all warranties that may be implied by law, including any merchantability or fitness, for any par-
ticular purpose, are hereby limited to the duration of this written warranty. We do not warrant or represent
that the merchandise complies with the provisions of any law or acts unless the manufacturer so warrants.
In no event shall Grizzly’s liability under this warranty exceed the purchase price paid for the product and
any legal actions brought against Grizzly shall be tried in the State of Washington, County of Whatcom.
We shall in no event be liable for death, injuries to persons or property or 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 to
achieve better quality equipment. We make every effort to ensure that our products meet high quality and
durability standards and we hope you never need to use this warranty.
In the event you need to use this warranty, contact us by mail or phone and give us all the details. We will
then issue you a “Return Number,’’ which must be clearly posted on the outside as well as the inside of
the carton. We will not accept any item back without this number. Proof of purchase must accompany the
merchandise.
Please feel free to write or call us if you have any questions about the machine or the manual.
Thank you again for your business and continued support. We hope to serve you again soon.
To
take advantage of this warranty, you must register it at https://www.grizzly.com/secureforms/
warranty-card
, or you can scan the QR code below to be automatically directed to our warranty
registration page
. Enter all applicable information for the product.
WARRANTY