5.2K Max.
2K Max.
8K Max.
5.2K Max.
8K Max.
9K Max.
5.2K Max.
8K Max.
8K Max.
8K Max.

Capacity
D20
D35
D52
D60
D70
D72
D80

Single
A/P-115-00
A/P-103-00
A/P-103-00
A/P-103-00
A/P-103-00
A/P-103-00
A/P-103-00

Tube Dia.
Optional
2.38
3.00
N/A
N/A
3.50
3.50
N/A

Pad Ht.
Standard
0.60
0.60
0.60
0.60
0.60
0.60
0.50

Pad Ht.
Optional
0.60
0.60
N/A
N/A
0.50
0.50
N/A

N/A - not applicable

Stack & Loaded Arch Heights

Attaching Parts Kits
33.5" Axle Spacing
Tandem
Triple
N/A
N/A
A/P-202-00 A/P-302-00
A/P-202-00 A/P-302-00
A/P-202-00 A/P-302-00
A/P-202-00 A/P-302-00
A/P-202-00 A/P-302-00
A/P-202-00 A/P-302-00

Tube Dia.
Standard
1.75
2.38
3.00
3.00
3.00
3.00
3.50

Capacity
D20
D35
D52
D60
D70
D72
D80

36" Axle Spacing
Tandem
Triple
N/A
N/A
N/A
N/A
A/P-216-00 A/P-316-00
A/P-216-00 A/P-316-00
A/P-216-00 A/P-316-00
A/P-216-00 A/P-316-00
A/P-216-00 A/P-316-00

Part
Capacity Number
700
072-003-00
1000
072-002-00
1500
072-029-00
2000
072-030-00
2500
072-031-00
3500
072-032-00
4000
072-051-01
4000*
072-051-02

Stack
Height
0.57
0.68
1.16
1.33
1.44
1.80
2.52
2.52

Width
(Inches)
1.75
1.75
2.00
2.00
2.00
2.00
2.00
2.00

HANGER & AP KITS

Slipper Leaf Springs

Axle
Loaded
Location Arch Height
13.00
3.12
13.00
3.12
11.50
2.00
11.50
2.00
11.50
2.00
11.50
2.00
11.50
2.00
11.50
2.00

* Rubber Bushed

Note: Common A/P kits are available in marine grade coating.

Loaded Arch

Stack

Equalizer

Front
Hanger

Tie Plate
U-Bolt

Spring Eye Bolts

Center Hanger

Tie Plate
U-Bolt

Rear
Hanger

Keeper Bolts

Overslung Shown

115

TORFLEX® INSTALLATION

Torflex® Installation
The following instructions describe methods that can be used to attach your Torflex® axles to the vehicle frame.
Step 1: The user must first decide where to place the axle(s) on the trailer. The position of the wheel center relative to the
CG (center of gravity) will determine the final axle loading as well as the hitch load.
Step 2: Determine the method of attachment you wish to use.
a. For structural tube type frame rails, refer to Figure 1 for the recommended attachment.
b. For “C” channel or “I” beam type frame, refer to Figure 2.
Step 3: Once the method of attachment is decided, the axle(s) must be carefully aligned on the trailer frame. The axle(s)
centerline must be perpendicular to the longitudinal centerline of the trailer. See figure 3.
CAUTION: Misalignment of the axle(s) can cause poor tracking and accelerated tire wear.
Attachment to Structural Tube Type Frame
a. Dexter recommends the use of side mounting hangers when mounting axles to tubular type frames. These hangers
provide a convenient means for bolting the axles in place. All of the necessary components are included in the Side
Mount A/P Kits listed in Chart 1.
b. Refer to Chart 2 to find the mounting bracket dimensions of your axles. This chart shows the dimensions from the wheel
center to the bolt holes of the brackets.
c. The preferred way to use the side mount hanger is to pre‑assemble the hangers to the axle using the hardware provided
in the A/P kit. Make sure the hangers are clamped firmly against the axle brackets and the bolts are tightened to the
torque specifications shown in Chart 1. Position the axle assembly on the frame rails in the desired location and weld
the side mount hangers to the frame.
d. Axle bracket position is the distance as measured over the outboard edges of the brackets. This dimension is usually
matched to the outside measurement of the frame members but depending on the type of frame may not always be
suitable. The preferred arrangement should place the longest vertical section of the axle bracket directly under the most
rigid section of the frame member.
Side Mount Installation

OUTSIDE FRAME

OUTSIDE BRACKET DIMENSION

Washer(s) must be placed against the
slotted hole in the axle bracket.
NOTE: Low profile brackets have plain
round holes.

Figure 1

Side mount hangers should be welded to frame with three (3) ¹⁄₄" fillet welds, 2¹⁄₂" long on each side of the hanger and a
fillet weld on each end. Welds should meet the quality standards of the American Welding Society, D1.1, Structural Welding
Code.

116

Torflex® Installation
Attaching Parts Kits and
Torque Specifications
Axle
Size

A/P Kit
Top Mount

A/P Kit
Side Mount

A/P Kit
Side Mount Aluminum

Bolt
Size

Torque
Lb-Ft.
70-90

#8

A/P-161-00

A/P-165-00

A/P-180-00

1/2"

#9

A/P-161-00

A/P-165-00

A/P-180-00

1/2"

70-90

#10

A/P-148-00

A/P-166-00

A/P-181-00

5/8"

120-155

#10L

A/P-148-00

A/P-166-00

A/P-181-00

5/8"

120-155

#10F

A/P-148-00

A/P-166-00

A/P-181-00

5/8"

120-155

#11

A/P-148-00

A/P-167-00

A/P-182-00

5/8"

120-155

#12

A/P-148-00

A/P-168-00

A/P-183-00

5/8"

120-155

#12T

A/P-148-00

A/P-169-00

5/8"

120-155

#12V

A/P-148-00

A/P-168-00

5/8"

120-155

#13

A/P-148-00

A/P-169-00

5/8"

120-155

#13T

A/P-148-00

A/P-169-00

5/8"

120-155

Side mount hangers and fasteners for mounting axle are provided in the A/P Attaching Parts Kits shown in Chart 1. Torque
fasteners to levels specified in Chart 1.

TORFLEX® INSTALLATION

Chart 1

Attachment to Structural Tube Type Frame
a. Refer to Chart 2 to find the mounting bracket dimensions of your axles. This chart shows the dimensions from the wheel

center to the bolt holes of the brackets.
b. Lay out the bolt hole locations on the bottom flanges of the frame rails. Make sure the hole pattern matches the
mounting brackets of your axles and is properly oriented to allow proper alignment of the axle(s).
c. An alternate method for determining hole location is to position the axle assembly on the frame rails, align it
perpendicular to the trailer centerline, clamp in place and transfer the holes directly from the brackets.
d. Drill the holes through the frame rails and attach the axle using the hardware provided in the A/P kit. Tighten the bolts to
the torque specified in Chart 1.
CAUTION: When bolting to structural shapes that have tapered flanges, bevel washers must be used to prevent uneven
clamping and bending of the fasteners.
Note: In the unlikely event a Torflex® axle must be replaced during the warranty period, Dexter cannot assume
responsibility for additional costs incurred for removal and reinstallation of axles that have been welded directly to the
frame.
Top Mount Installation

“C” channel frames should be
reinforced in the area over the axle(s).
Use bevel washers when
bolting to structural steel.

Figure 2

CAUTION: “C” channel and “I” beam type frame sections should be reinforced in the area over the axle mounting
brackets. It is recommended that the vertical leg of the axle bracket be positioned directly under the vertical segment or
reinforcement of the frame member.
117

TORFLEX® INSTALLATION

Torflex® Installation
Chart 2
Bracket Dimensions
“E” Side Holes

“D” Top Holes

Fender Clearance: allow 3" over the tire at full load.

“X”

Start Angle of Trailing Arm
Mounting Hole to Wheel Center - Dimension "X" (Inches)
45° Down
Torflex®
Axle Model

No
Load

Full
Load

32° Down
No
Load

Full
Load

22.5° Down
No
Load

Full
Load

10° Down
No
Load

0°

Full
Load

No
Load

10° Up
Full
Load

No
Load

Full
Load

22.5° Up
No
Load

Full
Load

Mounting Hole
Spacing (Inches)
Dim "D"
(Top)

Dim "E"
(Side)

#8 (4" arm)

5.21

6.08

5.77

6.33

6.08

6.38

6.32

6.29

6.38

6.08

6.32

5.75

6.08

5.21

7.75

8.00

#9 (6" arm)

6.62

7.92

7.47

8.30

7.92

8.38

8.29

8.24

8.38

7.92

8.29

7.44

7.92

6.62

7.75

8.00

#10 (6" arm)

6.74

8.04

7.59

8.42

8.04

8.50