Axle Tube Perch Blueprint - Fits 3 3/8" or 3 1/2" Tube, Dimensioned Drawing
Dimensioned CAD part drawing of a tube saddle bracket with grind notes, hole pattern and an isometric view.
This document is a dimensioned CAD blueprint (three views: side profile, top view, and a shaded 3D isometric render) of an axle spring/link perch or tube saddle designed to fit large-diameter axle tubes. The saddle radius is called out as Ø 3.50 inches, with a note stating: 'GRIND NUBS OFF TO FIT 3 1/2" TUBE, LEAVE ON TO FIT 3 3/8"' — meaning the same part fits either 3-3/8" or 3-1/2" axle tubes depending on whether small locating nubs inside the saddle are ground away. The side view shows a 3.375-inch saddle opening height and a .72-inch thickness dimension. The top view shows the part is 2.50 inches wide and 8.00 inches long, with three Ø .60-inch holes drilled along the centerline at 1.00-inch spacing. The filename (14PERCH.jpg) and companion album files (Dana 60 exploded views, beadlock diagrams, track bar mounts) suggest this is a fabrication template for a heavy-duty solid-axle perch, likely for a Dana 60 or similar large-tube axle swap on the uploader's 1995 Ford Bronco. A fabricator can use these dimensions to cut, drill, and fit the perch to their axle tube diameter.
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Frequently asked questions
- What tube diameters does this perch fit?
- It fits a 3 1/2" tube if the nubs are ground off, or a 3 3/8" tube if the nubs are left on, per the note on the drawing. The saddle radius is dimensioned Ø 3.50.
- What are the overall dimensions of the perch?
- The top view shows the part is 2.50 inches wide and 8.00 inches long, with a .72-inch thickness dimension and a 3.375-inch saddle opening shown in the side view.
- What size and spacing are the holes in the perch?
- There are three Ø .60-inch holes along the centerline, spaced 1.00 inch apart.
- How do I adapt the perch for a 3 1/2" axle tube?
- Per the drawing note, grind the nubs off to fit a 3 1/2" tube; leave them on to fit a 3 3/8" tube.
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