Rexroth: Screw Assemblies. Catalog (R999001185/2018-10) - page 17
Planetary Screw Assemblies PLSA | Screw Assemblies
241
Accessories
LGN-B-…
with slotted nut NMA
B
LGN-C-…
with slotted nut NMA
B
d0 x P
(mm)
d
D
B
Da
da
min
max
min
max
20 x 5
15 -0.010
45 -0.01
25 -0.25
32
35
20
31
30 x 5/10
20 -0.005
52 -0.01
56 -0.50
40
43
25
39
39 x 5/10
30 -0.005
62 -0.01
56 -0.50
50
53
40
49
48 x 5/10
35 -0.005
72 -0.01
68 -0.50
59
62
45
58
242
Screw Assemblies | Planetary Screw Assemblies PLSA
Accessories
Bearing assembly LAD
Floating bearing with deep-
groove ball bearing
The bearing assembly consists of:
--
deep-groove ball bearing as per
DIN 625
2RS
-–
retaining ring DIN 471 (2 pcs)
Separate technical dimensioning to
determine the limit values is absolutely
necessary for all attachments (e.g. pillow
block units, bearing assembly, etc.)
d0 x P
LAD
Single parts
Weight
C
C0
Deep-groove ball bearing DIN 625
Retaining ring DIN 471
complete
Part number
Part number
Abbreviation
Abbreviation
Part number
m (kg)
(N)
(N)
20 x 5
R1590 612 00
6201.2RS
R3414 042 00
12x1
R3410 712 00
0.035
6,950
2,650
R1590 615 00
6202.2RS
R3414 074 00
15x1
R3410 748 00
0.043
7,800
3,250
25 x 5/10
R1590 617 00
6203.2RS
R3414 050 00
17x1
R3410 749 00
0.064
9,500
4,150
30 x 5/10
R1590 620 00
6204.2RS
R3414 038 00
20x1.2
R3410 735 00
0.106
12,700
5,700
R1590 625 00
6205.2RS
R3414 063 00
25x1.2
R3410 750 00
0.125
14,300
6,950
39 x 5/10
R1590 630 00
6206.2RS
R3414 051 00
30x1.5
R3410 724 00
0.195
19,300
9,800
48 x 5/10
R1590 635 00
6207.2RS
R3414 075 00
35x1.5
R3410 725 00
0.288
25,500
13,200
60 x 10/20
R1590 650 00
6210.2RS
R3414 077 00
50x2
R3410 727 00
0.453
36,500
20,800
75 x 10/20
R1590 660 00
6212.2RS
R3414 078 00
60x2
R3410 764 00
0.783
52,000
31,000
For the codes, see the chapter entitled “Abbreviations”
Suitable for screw ends: Form
212
312
612
412
622
712
722
Planetary Screw Assemblies PLSA | Screw Assemblies
243
Accessories
B
d0 x P
(mm)
d
D
B
20 x 5
12
32
10
15
35
11
25 x 5/10
17
40
12
30 x 5/10
20
47
14
25
52
15
39 x 5/10
30
62
16
48 x 5/10
35
72
17
60 x 10/20
50
90
20
75 x 10/20
60
110
22
244
Screw Assemblies | Planetary Screw Assemblies PLSA
Accessories
Bearing assembly LAS
Fixed bearing with angular-con-
tact thrust ball bearing LGS
Double-thrust,
series LAS-E
The bearing assembly consists of:
--
angular-contact thrust ball bearing LGS
as per DIN 628 (not available as a sep-
arate part)
--
slotted nut NMA...
Separate technical dimensioning to
determine the limit values is absolutely
necessary for all attachments (e.g. pillow
block units, bearing assembly, etc.)
d0 x P
LAS
LGS
NMA
Weight complete
C
C0
nG1)
Part number
Abbreviation
Abbreviation
Part number
m
(kg)
(kN)
(kN)
(min-1)
20 x 5
R159A 415 01
LGS-E-1542
NMA 15x1
R3446 020 04
0.39
37.1
51.5
9,000
R159A 420 01
LGS-E-2047
NMA 20x1
R3446 015 04
0.57
39.9
63.8
8,550
35 x 5/10
R159A 417 02
LGS-E-1747
NMA 17x1
R3446 014 04
0.50
45.3
63.8
9,500
R159A 425 01
LGS-E-2562
NMA 25x1.5
R3446 011 04
1.10
74.1
120.0
7,500
30 x 5/10
R159A 420 02
LGS-E-2052
NMA 20x1
R3446 015 04
0.73
54.2
80.0
8,100
R159A 430 01
LGS-E-3072
NMA 30x1.5
R3446 016 04
1.68
98.3
163.1
5,850
39 x 5/10
R159A 430 01
LGS-E-3072
NMA 30x1.5
R3446 016 04
1.68
98.3
163.1
5,850
R159A 440 01
LGS-E-4090
NMA 40x1.5
R3446 016 08
2.74
140.8
257.7
4,500
48 x 5/10
R159A 435 01
LGS-E-3580
NMA 35x1.5
R3446 012 04
2.19
111.2
188.5
4,950
R159A 450 01
LGS-E-50110
NMA 50x1.5
R3446 019 04
4.95
211.2
392.3
3,600
60 x 10/20
R159A 445 01
LGS-E-45100
NMA 45x1.5
R9130 342 15
1.70
172.4
319.2
4,050
R159A 470 01
LGS-E-70150
NMA 70x2
R9130 342 17
10.99
339.2
692.3
2,520
75 x 10/20
R159A 460 01
LGS-E-60130
NMA 60x2
R9130 342 16
7.49
272.5
534.6
3,015
R159A 490 01
LGS-E-90190
NMA 90x2
R9163 113 51
21.45
470.3
1,123.1
2,025
1) Values as a guide for low bearing load, good heat dissipation and suitable lubricating greases with low consistency
For the codes, see the chapter entitled “Abbreviations”
Suitable for screw ends: Form
112
132
122
142
512
532
Planetary Screw Assemblies PLSA | Screw Assemblies
245
Accessories
B
d0 x P
(mm)
d
D
B
Da
da
min
max
min
max
20 x 5
15 -0.008
42 -0.011
52
33.0
36.0
-
-
20 -0.010
47 -0.011
56
36.0
41.0
25.6
35.0
25 x 5/10
17 -0.008
47 -0.008
56
36.2
41.1
22.6
35.2
25 -0.010
62 -0.013
68
48.1
55.0
32.0
47.1
30 x 5/10
20 -0.010
52 -0.013
60
40.0
45.0
-
-
30 -0.010
72 -0.013
76
56.5
65.0
37.0
55.5
39 x 5/10
30 -0.010
72 -0.013
76
56.5
65.0
-
-
40 -0.012
90 -0.015
92
72.0
81.0
49.0
71.0
48 x 5/10
35 -0.012
80 -0.013
84
63.0
71.0
-
-
50 -0.012
110 -0.015
108
89.0
100.0
61.0
88.0
60 x 10/20
45 -0.012
100 -0.015
100
81.0
91.0
-
-
70 -0.015
150 -0.018
140
121.0
138.0
82.0
119.0
75 x 10/20
60 -0.015
130 -0.018
124
106.0
118.0
-
-
90 -0.020
190 -0.030
172
153.0
176.0
104.0
150.0
812
832
822
842
912
932
922
942
246
Screw Assemblies | Planetary Screw Assemblies PLSA
Accessories
Bearing assembly FEC-F
Fixed bearing with angular-
contact thrust ball bearing LGS
The bearing assembly consists of:
--
precision flanged housing made of steel
-–
Angular-contact ball bearing LGS
-–
Slotted nut NMB
The slotted nut is delivered unmounted
Separate technical dimensioning to
determine the limit values is absolutely
necessary for all attachments (e.g. pillow
block units, bearing assembly, etc.)
d0 x P
FEC-F
LGS
NMB
Weight
C
C0
MRL1)
Rfb
RkL
nG2)
Part number
Part number
Part number
MA
MAG
complete
(Nm)
(Nm)
m (kg)
(kN)
(kN)
(Nm)
(N/µm)
(Nm/mrad)
(min-1)
20 x 5
R159B 425 01
LGS-E-2562
NMB 25x1,5
38
8
3.5
74.2
119.2
1.10
450
160
6,900
25 x 5/10
R159B 425 01
LGS-E-2562
NMB 25x1,5
38
8
3.5
74.2
119.2
1.10
450
160
6,900
30 x 5/10
R159B 435 01
LGS-E-3580
NMB 35x1,5
65
8
6.0
109.4
188.4
1.10
600
715
4,950
39 x 5/10
R159B 450 01
LGS-E-50110
NMB 50x1,5
110
18
11.8
208.8
392.3
1.50
750
1,000
3,600
48 x 5/10
R159B 465 01
LGS-E-65140
NMB 65x2
200
18
27.0
305.3
615.4
2.00
1 250
3,200
2,835
60 x 10/20
R159B 465 01
LGS-E-65140
NMB 65x2
200
18
27.0
305.3
615.4
2.00
1 250
3,200
2,835
75 x 10/20
R159B 490 01
LGS-E-90190
NMB 90x2
300
35
53.4
473.1
1,123.0
2.30
1 500
7,500
2,025
1) Measured at 50 rpm
2) Values as a guide for low bearing load, good heat dissipation and suitable lubricating greases with low Consistency
For the codes, see the “Abbreviations” on page 209.
Values apply to bearing configuration 2 + 2.
Bearing configurations 3 + 1 or 1 + 3 are possible. Please consult us.
Suitable for screw ends: Form
132
532
142
832
932
842
942
Planetary Screw Assemblies PLSA | Screw Assemblies
247
Accessories
L5
L4
L3
L
2
D7
B
D6
D5
d0 x P
(mm)
d
D
B
L2
L3
L4
L5
L9
D1
D3
D5
D6
D7
D10
h7
20 x 5
25-0.010
62-0.013
89
68.0
16
20
36.0
104.0
80
44
120
100
11.0
80
25 x 5/10
25-0.010
62-0.013
89
68.0
16
20
36.0
104.0
80
44
120
100
11.0
80
30 x 5/10
35-0.012
80-0.013
110
82.0
20
22
47.0
124.0
100
54
140
120
13.0
99
39 x 5/10
50-0.012
110-0.015
140
98.5
25
25
58.5
152.5
130
75
171
152
13.0
130
48 x 5/10
65-0.015
140-0.018
180
133.5
30
28
53.5
199.5
170
95
225
198
17.5
170
60 x 10/20
65-0.015
140-0.018
180
133.5
30
28
53.5
199.5
170
95
225
198
17.5
170
75 x 10/20
90-0.020
190-0.018
235
174.0
35
32
99.0
257.5
220
125
285
252
22.0
219
248
Screw Assemblies | Planetary Screw Assemblies PLSA
Accessories
Slotted nuts NMA for fixed bearings
Slotted nut NMA
B
0,005
A
C
--
For maximum vibratory loads
f
-–
NMA 15 to 40 with 4 segments
-–
NMA 45 to 90 with 6 segments
A
Abbreviation
Part number
(mm)
MA
FaB
MAG
Mass
d
D
B
c
m
e
f
g
(Nm)
(kN)
(Nm)
m (g)
NMA 15x1
R3446 020 04
M15x1
30
18
5
M5
24
4
5
10
100
3
60
NMA 17x1
R3446 014 04
M17x1
32
18
5
M5
26
4
5
15
120
3
70
NMA 20x1
R3446 015 04
M20x1
38
18
5
M6
31
4
6
18
145
5
130
NMA 25x1.5
R3446 011 04
M25x1.5
45
20
6
M6
38
5
6
25
205
5
160
NMA 30x1.5
R3446 016 04
M30x1.5
52
20
6
M6
45
5
7
32
250
5
200
NMA 35x1.5
R3446 012 04
M35x1.5
58
20
6
M6
51
5
7
40
280
5
230
NMA 40x1.5
R3446 018 04
M40x1.5
65
22
6
M6
58
6
8
55
350
5
300
NMA 45x1.5
R9130 342 15
M45x1.5
70
22
6
M6
63
6
8
65
360
5
340
NMA 50x1.5
R3446 019 04
M50x1.5
75
25
8
M6
68
6
8
85
450
5
430
NMA 60x2
R9130 342 16
M60x2.0
90
26
8
M8
80
6
8
100
550
15
650
NMA 70x2
R9130 342 17
M70x2.0
100
28
9
M8
90
8
10
130
650
15
790
NMA 90x2
R9163 113 51
M90x2.0
130
32
13
M10
118
8
10
200
900
20
1.530
For the codes, see the chapter entitled “Abbreviations”
Planetary Screw Assemblies PLSA | Screw Assemblies
249
Accessories
Ring nut GWR
--
For angular-contact thrust ball bearing LGN
B
0,01
A
g
A
Attention:
Use a threadlocker (for example,
Loctite 638) to secure against loosening
MA = Tightening torque for Threaded Ring
Abbreviation
Part number
(mm)
MA
Mass
D
d
B
e
f
g
(Nm)
m (g)
GWR 18x1
R1507 040 33
M18x1
8.5
8
12.5
2.5
3
6
10.0
GWR 23x1
R1507 240 35
M23x1
13.0
8
18.0
2.5
3
8
15.0
GWR 26x1,5
R1507 240 22
M26x1.5
16.5
8
20.5
2.5
3
10
16.5
GWR 30x1,5
R1507 340 34
M30x1.5
17.0
8
23.0
3.0
4
20
29.0
GWR 36x1,5
R1507 040 23
M36x1.5
22.0
8
29.0
3.0
4
25
35.0
GWR 40x1,5
R1507 140 03
M40x1.5
25.0
8
33.0
3.0
4
28
39.5
GWR 45x1,5
R1507 240 04
M45x1.5
28.0
8
38.0
3.0
4
30
55.0
GWR 50x1,5
R1507 240 25
M50x1.5
31.0
10
40.0
4.0
5
45
86.0
GWR 55x1,5
R1507 340 05
M55x1.5
36.0
10
46.0
4.0
5
50
96.0
GWR 58x1,5
R1507 440 32
M58x1.5
43.0
10
50.0
4.0
5
58
84.0
GWR 60x1
R1507 440 28
M60x1
43.0
10
51.0
4.0
5
60
97.0
GWR 62x1,5
R1507 440 29
M62x1.5
43.0
12
53.0
5.0
6
60
127.0
GWR 65x1,5
R1507 440 26
M65x1.5
47.0
12
55.0
4.0
5
70
136.0
GWR 70x1,5
R1507 440 06
M70x1.5
42.0
12
58.0
4.0
5
75
216.0
GWR 78x2
R1507 567 27
M78x2
54.0
15
67.0
6.0
7
90
286.0
GWR 92x2
R1507 640 09
M92x2
65.0
16
82.0
6.0
7
125
385.0
GWR 95x2
R1507 667 28
M95x2
68.0
16
82.0
6.0
7
130
425.0
GWR 112x2
R1507 740 11
M112x2
82.0
18
100.0
8.0
8
175
596.0
GWR 115x2
R1507 767 29
M115x2
85.0
18
100.0
8.0
8
200
664.0
250
Screw Assemblies | Planetary Screw Assemblies PLSA
Accessories
Measuring pads
Alignment of the Planetary Screw
Assembly in the machine
Rexroth can provide a gauge with a
self-aligning contact pad for easy alignment
of the Planetary Screw Assembly.
Two pads of different lengths are available
which can be used depending on the screw
lead:
--
material no. R3305 131 19:
length 33 mm
--
material no. R3305 131 21:
length 50 mm
Dial gauge not supplied as standard with the Planetary Screw Assembly
Planetary Screw Assemblies PLSA | Screw Assemblies
251
Accessories
252
Screw Assemblies | Planetary Screw Assemblies PLSA
Technical data
Technical notes
The degree of efficiency determines the
torque required to convert the rotary motion
into linear motion.
120
Due to their high mechanical efficiency,
Ball Screw Assembly
PLSAs are in principle not self-locking.
100
cc
Safety information
For installation, customers should check
80
Planetary Screw Assembly
whether separate protection against falling
loads is required.
60
Please consult us.
40
20
Acme screw
0
0
1
2
3
4
5
6
7
8
Lead angle (°)
--
The maximum mechanical efficiency of
--
Less drive power required
Advantages over the Acme screw drive
an Acme screw drive is 50%, whereas a
-–
No stick-slip effect
Planetary Screw Assembly can achieve
-–
More precise positioning
90%, and a Ball Screw Assembly 98%.
-–
Higher travel speed
--
Higher life expectancy due to negligible
--
Less heat-up
wear during operation
Selection criteria for Planetary Screw
The factors below should be considered
Assemblies (extract)
when selecting the PLSA for a given appli-
cation:
-- buckling load
--
degree of accuracy required
-–
rigidity/permissible clearance or desired
(lead deviation)
preload
-- Load
--
characteristic speed (max. permissible
-– Service life
linear speed)
-– critical speed
cc
Note
Radial and eccentric forces relative to the screw must be avoided, as they can affect the PLSA’s performance and shorten its life.
Where special conditions of use are involved, please consult us.
The following points should be taken into consideration when selecting a PLSA that is to be both cost-efficient and optimally designed:
--
The calculation of the service life should be based on average loads and average speeds, not on maximum values.
-–
In order for us to provide you with a customized solution, installation drawings or sketches of the nut environment should be enclosed.
Planetary Screw Assemblies PLSA | Screw Assemblies
253
Technical data
Static load rating C0
The static load rating is an axial, concentrically acting force that induces a permanent defor-
mation of 0.0001 x the rolling element diameter.
Dynamic load rating C
The dynamic load rating is an axial, concentrically acting force of constant magnitude and
direction under which 90% of a sufficiently large number of identical PLSAs can achieve a
nominal service life of one million revolutions.
Correction factor for tolerance grades
The static load rating C0 and the dynamic load rating C must be multiplied by the correction
factor fac as appropriate for the specific tolerance grade of the screw.
Tolerance grade T
5
7
9
fac
1
0.9
0.8
Service life
The nominal service life is expressed by the number of revolutions (or number of operating
hours at constant speed) that will be attained or exceeded by 90% of a representative
sample of identical Planetary Screw Assemblies before the first signs of material fatigue
become evident. The nominal life is designated as L or Lh h, depending on whether it is
specified in revolutions or hours.
The nominal life calculation is based on optimal installation and environmental conditions.
The service life may be shortened, for example, if the lubrication is affected by exposure to
process media.
Critical speed and buckling load
The critical speed and buckling load can be checked using the corresponding charts. For
precise calculations
see formula 12
15 , in the section “Design Calculations”
Characteristic speed
d0 · n
Rexroth PLSAs can be operated at very high speeds due to their structural design. Charac-
teristic speeds of up to 150,000 are possible depending on the nut type. The characteristic
speeds can be exceeded for short periods, please consult us.
d0 · n
≤
150,000
d0
=
nominal diameter
(mm)
n
=
speed
(rpm)
The theoretically possible maximum linear speed vmax (m/min) is specified on the page
featuring the relevant nut. Actually attainable speeds are heavily dependent among other
factors on preload and duty cycle. They are generally restricted by the critical speed.
(See “Design Calculations”).
Material, hardness
PLSA's are made of high-quality, heat-treatable steel, carbon chrome alloy steels or
case-hardened steels. The screw and nut raceways have a minimum Rockwell hardness of
HRC 58. The screw ends are not hardened.
254
Screw Assemblies | Planetary Screw Assemblies PLSA
Technical data
Technical notes
Sealing
PLSAs are precision assemblies that require protection against contamination. Flat protec-
tive covers, bellows-type dust boots or other enclosures are particularly suitable for this
purpose. As there are some applications in which these methods do not provide sufficient
protection, we have developed an additional gapless lip-type seal which ensures an optimal
sealing effect and maintains high efficiency due to the low friction level. Our PLSAs can
therefore be supplied with lip-type seals as an option.
At the customer’s request, the seals can be omitted entirely.
To ensure that seals retain their functionality, dirt must be removed at regular intervals.
Short stroke
Lubrication:
Short stroke applications = stroke ≤ nut
During a short stroke, the planets do not make a real turn. It is therefore impossible for an
length
adequate lubricating film to form. This may result in premature wear.
To avoid this, it is sufficient to perform longer strokes at regular intervals with simultaneous
relubrication as “lubricating strokes”.
Load rating:
Short stroke applications will increase the number of times a rolling load passes over each
point within the load zone.
This reduces the load rating.
Please consult us.
Permissible operating temperatures
Standard design PLSAs allow a continuous temperature of 60 °C (measured on the outer
shell of the nut).
Permissible operating temperatures:
-10 °C ≤ Toperation ≤ 60 °C
Permissible bearing temperatures:
-15 °C ≤ Tbearing ≤ 80 °C
Applications with high-loading and/or rapid cycles can generate excessive heat. To prevent
excessive heating, Bosch Rexroth recommends cooling the screw and/or the nut. Apart
from this, we can offer solutions for uses at higher temperatures.
Bearing
When calculating the life expectancy of the overall system, the end bearings must be
considered separately.
Planetary Screw Assemblies PLSA | Screw Assemblies
255
Technical data
Acceptance Conditions and Tolerance Grades
Permissible travel deviation
PLSA with precision screw PSR
T
based on DIN ISO 3408-3
l 1
l 0
Symbol definitions:
le
l u
le
(excerpt)
l0
= nominal travel
l1
= thread length
300
∆l0
= travel deviation
lu
= Useful travel
le
= excess travel (the closer tolerances for
travel and hardness do not apply here)
c
= travel compensation (target travel
deviation) (standard: c = 0)
ep
= tolerance mean target travel deviation
ν300p = permissible travel deviation within
300 mm travel
ν2πp
= permissible travel deviation within one
revolution
c = 0
Useful travel lu
Tolerance mean actual travel deviation ep (µm)
Tolerance grade
>
≤
5
7
9
0
100
18
44
110
100
200
20
48
120
200
315
23
52
130
315
lu
ep
300p
300
ν300p (µm)
For precision screws PSR the following
Tolerance grade
values apply in all cases:
5
7
9
23
52
130
d0
le
Non-usable length le
(mm)
(mm)
(Excess travel)
20, 25, 30, 39
40
48, 60, 75
50
Lead P
Minimum number of measurements for tolerance grade
Minimum number of measurements within
(mm)
5
7
9
300 mm (measuring interval) and excess
5
6
3
3
travel to be taken into consideration.
10
3
1
1
20
3
1
1