Product Manual

Build Yo ur Own Axle
Weld your own custom axle using Tie Down Engineering’s axle tube and spindles
READ ALL INSTRUCTIONS BEFORE STARTING
WARNING
Welding an axle requires that you have the proper equipment and have the skill
to apply a proper weld. If you are not comfortable with your welding capabilities,
have a qualified welder assemble you axle.
2. Determine the Hub Face measurements required for your trailer.
a. If you are replacing an axle, measure the distance from the outside face of each hub.
b. If you are building a new trailer/axle, consider the space required for the wheel/tire combination to
properly fit the trailer frame.
4. Cut tube to required length (measure twice, cut once!).
Special care should be taken to make sure the cut is
“Square” at 90 degrees. Remove any burrs inside and
outside the tube.
5. Clamp tube to a secure welding table.
6. Insert round spindle or end unit (hub/spindle) into the
square tube so that the brake flange or circular flange is
flush against the end of the tube.
7. Support the spindle or end unit so that it does not
move during the welding operation.
8. Weld a 1/4” fillet weld on all sides of the surface joint.
9. Allow to cool before using.
10. Determine spring center location. Drill 9/16” holes for the
center spring bolt head to fit in. Use spring hanger kit to
complete axle.
TIP:
Place spindle or end unit in one end of the axle tube. Place axle on trailer to get a
visual of where to cut tube. Make sure the tube is close to your “math” calculations.
When used with Tie Down Engineering’s Spindles and Hubs listed
on these pages the hub to flange width equals:
1.5” Tube: 5-7/8” (2-15/16”x 2) 2.0” Tube: 6-5/8” (3-5/16” x 2)
#124991
1.5” x 1.5” x 72” axle tube, up to 1,500 lb. capacity
Use with: #128006 - 4 Lug Hub & Spindle End Unit
#128007 - 5 Lug Hub & Spindle End Unit
#124993 - 1350 lb. Spindle with Flange
(2 per pack, for hubs with
1-1/16” inner & outer bearings
& 1.25” seals)
#124997
2” x 2” x 72” axle tube, up to 3,500 lb. capacity
Use with: #128008 - 5 Lug Hub & Spindle End Unit.
#124994 - 1750 lb. Spindle with
Brake Flange (2 per pack,
for hubs with 1-1/16” &
1-3/8” bearings & 1.72” seals)
Hub Face: Distance between
hub face to hub face
Track: Distance between
center tire to center tire
Spring Center: Distance between the
center of springs & hangers
(if used)
Hub Face
Springs (centers)
Axle
Spring
Centers
Springs &
Hangers
Track
Hub Face
Hub Face
Rear of the spindle flange
“Hub to Flange Width”
(distance between hub face +
rear of the spindle flange)
x 2 (both hubs)
1.5” Tube Calculation
Hub Face Needed:
Hub to Flange Width: - 5-7/8”
Cut Tube to Length:
3. Calculate your axle tube length:
Tube Length = Hub Face minus Hub to Flange Width
Instructions
1. Determine the axle capacity required for your trailer. Trailer capacity is based on the lowest capacity of
the trailer components. This includes but is not limited to: frame, axle, spindles, hubs, bearings, wheels,
tires, springs and all hardware.
2” Tube Calculation
Hub Face Needed:
Hub to Flange Width: - 6-5/8”
Cut Tube to Length:
Square
Axle Tube
Spindle
Square
Tube
Drill two 9/16” holes
Mount spindle flush to the axle tube
1/4” Fillet Weld
Tube
Flange
Spindle
013108,F996
Instruction Sheet #08109