THE THREADS EXPAND OUTWARD
FYH original setscrew





The patented FYH Bullet Point set screw is a one piece ball point set screw which is designed to expand the threads of the screw as the point of the screw contacts the surface of the shaft.

The resulting force creates superior holding power especially where vibration is present. Other set screws have larger contact areas with sharp edges at the point of the screw to bite into the shaft. However, these sharp edges damage more easily from vibration which creates a gap between the point of the set screw and the shaft. Once this gap is established, the set screw will begin to loosen.

When the Bullet Point set screw is tightened, the original shape of the point causes the threads of the screw to expand up to and beyond the elastic limit to achieve the maximum possible holding power. The thickness of the point is also designed to expand easily. This specialized design drastically reduces the potential for damage to both the set screw and shaft from normal use or for severe vibration, shock load, and high speed.

Set screw suffix code is G23.


Nominal size
of screws
Tightening
torques, N・m
Part No. of applicable bearings
UC2, RB
UCX
UC3
SB
ER
M 6X0.75
4
201-206
X05
305, 306
204-207

201-206

1/4-28UNF
M 8X1
8.5
270-209
X06-X08
307
208
207-209
5/16-24UNF
M 10X1.25
17.5
210-212
X09-X11
308, 309
-
210-212
3/8-24UNF
M12X1.5
28
213-218

X12-X17
X12-X18

310-314
-
-
1/2-20UNF