Ondrives: Linear - Rotary Bushings - ST-UUB - Heavy Duty Sealed Type Stroke Rotary Bushings

ST-UUB : Heavy Duty Sealed Type Stroke Rotary Bushings

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ST-UUB Type : Heavy Duty Sealed Type Stroke Rotary Bushings

ST-UUB Heavy Duty Stroke Rotary Bushings

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1+ 0%

20+ 5%

40+ 10%

60+ 15%

100+ 20%

200+ 35%

Part Number	Shaft Dia.	Weight (g)	Max Stroke	ØB	ØD	L	L1	T	t	r	Basic Dynamic Load Rating C kgf	Basic Static Load Rating Co kgf	Cost	Quantity	Add to Basket
ST30UUB	30	230	27	30	45	65	45.1	2.5	0.5	1.0	520	660	£75.58
ST35UUB	35	359	37	35	52	70	50.1	2.5	0.7	1.5	540	730	£90.08
ST40UUB	40	553	49	40	60	80	59.9	2.5	0.7	1.5	720	1000	£111.55
ST45UUB	45	602	49	45	65	80	59.9	2.5	0.7	1.5	750	1110	£151.08
ST50UUB	50	871	70	50	72	100	77.4	3.0	1.0	1.5	960	1450	£204.78
ST55UUB	55	1230	70	55	80	100	77.4	3.0	1.0	2.0	1000	1580	£223.09
ST60UUB	60	1320	70	60	85	100	77.4	3.0	1.0	2.0	1040	1720	£266.97
ST70UUB	70	1480	70	70	95	100	77.4	3.0	1.0	2.0	1080	1940	£336.06
ST80UUB	80	2140	58	80	110	100	77.0	3.0	1.5	2.0	1360	2540	£419.76
ST90UUB	90	2370	58	90	120	100	77.0	3.0	1.5	2.0	1420	2810	£512.50
ST100UUB	100	2620	58	100	130	100	77.0	3.0	1.5	2.0	1460	3060	£610.26

Material
Carbon Steel

Fit
The fit of Stroke Rotary Bushing with shaft and housing is recommend as shown in Table 1.

TABLE 1 - Fit
General Application		Vertical Axis or High Accuracy
Shaft	Housing	Shaft	Housing
k5.m5	H6.H7	n5.p6	J6.J7

Since this series may function in both rotary and linear directions at the same time, radial clearance should be held to minimum if shock load is applied or vibration is present during the operation.
When this series is used in a vertical axis or very accurate movement is required, it is especially recommended to use zero or minimal preload.
However, since excess preload shortens life, radial clearance smaller than the values shown in Table 2 should not be used.

TABLE 2 - Minimum Radial Clearance
Inscribed Circle Diameter dr mm		Minimum Value of Radial Clearance
Over	Incl.	Minimum Value of Radial Clearance
4	6	-2
6	10	-3
10	18	-4
18	20	-5
30	50	-6
50	80	-8
80	100	-10

Allowable Limit of Speed
Stroke Rotary Bushing series can operate in both linear and rotary directions at the same time.
The allowable limit of speed when linear motion and rotation occur at the same time can be obtained from the following formula.

DN=> dp n + 10 S n 1....(6), where;

DN = Limit of Speed (ref. table 3)
n = No. of revolutions per minute, Rpm.
n1 = No. of strokes per min., cpm
S = Stroke length, mm
dp = Pitch circle dia. of balls, mm (dp = 1.15dr)
dr = inscribed circle dia., mm
This formula is only applicable when n1 <=5000 and Sn1 <= 50000

Limiting Values in general are shown in Table 3.

TABLE 3 - Limit of Speed
Terms of Lubrication	DN
Oil	600000
Grease	300000

Other Info.
Actual Stroke Length should be less than 80% of max. stroke.
Mating Shafts should be HRC58-64. Surface roughness 0.85 or better.
We recommend our linear shafting Z-A or Z-B types. Oil holes provided for lubrication.

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PDF Documents : Catalogue Page