Thiết bị đo độ căng nan hoa xe đạp

This spoke tension meter is based on a design from DT swiss.

Note: as long as this tool is not calibrated, only comparison measurements can be done, no absolute spoke tension is measured.

Features:

• Set screw allows to adapt the spring force
• tool-less mounting of the dial indicator
• If M5 version used: no slipping of the spoke

There are two versions, in the M4 version the two outer hex socket screws that grab the spoke are M4, no modification of screw head needed. For additional comfort, use M5 version and use a lathe to carve the M5 head a concave shape with diameter 7mm (M4 head diameter).

I supply Fusion360 and step file in case you need to modify anything.

• analog or digital dial indicator
• 2x bearing 624ZZ (4x13x5mm)
• 1x compression spring 7mm x 32mm x 0.8mm
• M4 x 25
• 2x M5 x 10 or M4 x 10
• 2x M5 Washer or M4 Washer (diameter 15mm)
• 2x M5 x 16 (one of them needs to have a hex head to mount the knob)
• 1x M5 Washer diameter 9mm
• 6x M4 washer diameter 8mm
• 2x M5 hex nut
• 1x M8x12 set screw

When assembling make sure to add the six M4 washers as seen in the cross section view.

After printing the grip, remove the included  support in the dial clamp with a sharp knive.

Knob assembly: heat up the M5 screw with the hex head, then press it into the knob. This will hold it tight once cooled.