An In-Depth Study on Load Distribution Characteristics of the Planetary Threaded Roller Bearing

Table 1

Main structural parameters of the PTRB.

Parameter	Meaning of the parameters	Value
	Thread bottom thickness of the inner ring	1.08 mm
	Thread bottom thickness of the outer ring	1.08 mm
	Thread bottom thickness of the threaded roller	1.05 mm
	Thread ridge thickness	0.6 mm
	Dedendum	0.24 mm
	Pitch diameter of the bearing inner ring	36.5 mm
	Pitch diameter of the bearing outer ring	48.5 mm
	Pitch diameter of the threaded roller	6mm
	Outside diameter of the PTRB	55 mm
	Inner diameter of the PTRB	30 mm
	Distance between threads	1.2 mm
	Contact angle	45°
	Tooth shape half-angle	45°
	Elastic modulus	212 GPa
	Addendum circle diameter of the threaded roller	6.4 mm
	Poisson’s ratio	0.29
	Pitch diameter of the thread pair	42.5 mm
	Raceway radius of the bearing inner ring	∞
	Raceway radius of the bearing outer ring	∞
	Arc radius of the threaded roller	5.1 mm
	Number of threaded rollers	11
	Number of thread teeth per threaded roller	10