D Product information
SLT/TLT rotating nut Long lead rolled ball screw with rotating nut Concept The nut rotates inside bearings and moves along the fixed long lead screw shaft. The drive motor moves with the nut, so inertia and critical speed problems, associated with a long rotating shaft, are minimised.
Design details • 72 series angular contact bearings are directly mounted on the nut. • They are preloaded in “0” configuration in order to fully support the torque due to the belt tension. • 2 Nilos seals protect these bearings against pollution and permit lubrication for life. • Two versions available: – Ball screw with axial play: SLT – Ball screw with backlash elimination: TLT • Two brush wipers are mounted in the standard configuration for better protection. • Ball screw lubrication: through the nipple placed on the housing external diameter in the standard version, or as an option through the screw shaft. • Ball nut greased with SKF LGMT2. Other lubricants possible on request.
Lead (right hand)
Ball screw capacities SL TL Basic load ratings Basic load ratings
Bearing
Rotating nut
Basic load ratings
d0
Ph
Ca
Ca
Mass Max trans- Max trans- Inertia with pulley missible missible axial load support torque
mm
mm
kN
25
20 25
39,5 33,5
96,6 80,5
21,8 18,5
48,3 40,2
61,8 61,8
32
20 32 40
49,9 32,1 30
141,2 87,3 81,7
27,5 17,6 16,5
70,6 43,7 40,8
40
20 40
54,6 53,3
176,7 133,8
30,1 29,4
50
50
94,8
238,2
52,3
Nominal diameter
34
Coa
Ca
Coa
Coa
Designation
Nm
kN
kgmm2
kg
–
56 56
180 180
68,3 68,3
1 012 1 023
4,5 4,6
SLT/TLT 25¥20 R SLT/TLT 25¥25 R
78 78 78
76,5 76,5 76,5
209 209 209
107 87,3 81,7
1 935 1 919 1 949
7,2 7,1 7,1
SLT/TLT 32¥20 R SLT/TLT 32¥32 R SLT/TLT 32¥40 R
88,3 66,9
93,6 114
91,5 118
240 246
116 93,3
3 095 3 784
7,5 8,4
SLT/TLT 40¥20 R SLT/TLT 40¥40 R
119,1
156
166
803
162
1 1482
15,5
SLT/TLT 50¥50 R
kN