LInEar BaLL BEarIngS HarDEnED StEEL SHaft
,).%!2 3/,54)/.3
INDEX
Index LME linear ball bearings Closed design 5-60 mm
page 4
LMES stainless linear ball bearings Closed design/12-40 mm
page 5
SBE linear ball bearings Self-aligning closed design/16-50 mm
page 6
KH linear ball bearings Compact type/6-50 mm
page 7
LME linear ball bearings Open design/12-50 mm
page 8
Linear ball bearing units Type KBA..GUU/12-50 mm
page 9
Linear ball bearing units Open type KBA..GUUOP/16-50 mm
page 10
Linear ball bearing units Type LMEK..UU/12-40 mm
page 11
Linear ball bearing units long type Type LMEK..LUU/12-40 mm
page 12
Shaft blocks SK 12-40 mm/SHF 12-40 mm
page 13
Shaft mounted at shaft support Type SSU/12-50 mm
page 14
Shaft support in Aluminium FTSN Flange Type and FTSU Low Type
page 15
Shaft Support in Aluminium With mounting holes
page 16-18
Precision shaft Technical section
page 19
Precision shaft Hardened and ground Type W
page 20
Precision shaft Hardened and ground stainless steel Type WRB
page 21
Precision shaft Hardened and ground/Chromium plated Type WV
page 22
One Partner for Linear Components
page 23
3
LME linear ball bearings
Closed design/5-60 mm L B W
W
D D1
d
LME..UU
Dimensions Model no.
LME5UU LME8UU LME12UU LME16UU LME20UU LME25UU LME30UU LME40UU LME50UU LME60UU
Number Inscribed of ball circle rows diameter
4 4 4 5 5 6 6 6 6 6
Outer locking groove
Outer locking groove diameter
Basic load ratings N
d
D
L
B
D1
W
Dynamic
Static
5 8 12 16 20 25 30 40 50 60
12 16 22 26 32 40 47 62 75 90
22 25 32 36 45 58 68 80 100 125
14.5 16.5 22.9 24.9 31.5 44.1 52.1 60.6 77.6 101.7
11.5 15.2 21 24.9 30.3 37.5 44.5 59 72 86.5
1.1 1.1 1.3 1.3 1.6 1.85 1.85 2.15 2.65 3.15
210 270 520 590 880 1000 1600 2200 3900 4800
270 410 790 910 1400 1600 2800 4000 8100 10200
Other types on request
4
Outer Length diameter
LMEs stainless linear ball bearings
Closed design/12-40 mm L B W
W
D D1
d
LMES..UU
Dimensions Model no.
LMES12UU LMES16UU LMES20UU LMES25UU LMES30UU LMES40UU
Number Inscribed of ball circle rows diameter
4 5 5 6 6 6
Outer Length diameter
Outer locking groove
Outer locking groove diameter
Basic load ratings N
d
D
L
B
D1
W
Dynamic
Static
12 16 20 25 30 40
22 26 32 40 47 62
32 36 45 58 68 80
22.9 24.9 31.5 44.1 52.1 60.6
21 24.9 30.3 37.5 44.5 59
1.3 1.3 1.6 1.85 1.85 2.15
520 590 880 1000 1600 2200
790 910 1400 1600 2800 4000
Other stainless types on request
5
SBE linear ball bearings
30'
Self-aligning closed design/16-50 mm
D
30'
d
d
W
B L
Dimensions Model no.
SBE16UU SBE20UU SBE25UU SBE30UU SBE40UU SBE50UU
Number of ball rows
Inscribed circel diameter
Outer diameter
d
D
L
B
W
Dynamic
Static
5 6 6 6 6 6
16 20 25 30 40 50
26 32 40 47 62 75
36 45 58 68 80 100
24.6 31.2 43.7 51.7 60.3 77.3
1.3 1.6 1.85 1.85 2.15 2.65
1200 2400 4600 5700 9500 14000
620 1280 2240 3020 4400 6900
Other types on request
6
Length
Outer locking groove
Basic load ratings N
KH linear ball bearings
Compact type/8-40 mm
d
D
L
Dimensions Model no.
KH0622PP KH0824PP KH1026PP KH1228PP KH1428PP KH1630PP KH2030PP KH2540PP KH3050PP KH4060PP KH5070PP
Inscribed circle diameter
Outer diameter
Length
Basic load rating
d
D
L
Dynamic Static
6 8 10 12 14 16 20 25 30 40 50
12 15 17 19 21 24 28 35 40 52 62
22 24 26 28 28 30 30 40 50 60 70
400 200 500 370 620 460 580 1240 2000 3300 5500
External Seals
N
239 310 370 460 520 590 710 1420 2110 3340 6300
- - - G G G G G G G -
12 x 19 x 3 14 x 21 x 3 16 x 24 x 3 20 x 28 x 4 25 x 35 x 4 30 x 40 x 4 40 x 52 x 5
Other types on request
7
LME linear ball bearings
Open design/12-50 mm L B W
W
y
D D1
d
LME...UUOP
Dimensions Model no.
LME12UUOP LME16UUOP LME20UUOP LME25UUOP LME30UUOP LME40UUOP LME50UUOP
Number Inscribed Outer Length Outer of ball circle diameter locking rows diameter groove
3 4 4 5 5 5 5
Basic load rating
N
d
D
L
B
D1
W
y
Dynamic Static
12 16 20 25 30 40 50
22 26 32 40 47 62 75
32 36 45 58 68 80 100
22.9 24.9 31.5 44.1 52.1 60.6 77.6
21 24.9 30.3 37.5 44.5 59 72
1.3 1.3 1.6 1.85 1.85 2.15 2.65
78° 78° 60° 60° 60° 60° 60°
520 590 880 1000 1600 2200 3900
Other types on request
8
Outer locking groove diameter
790 910 1400 1600 2800 4000 8100
Linear ball bearing units
Type KBA...GUU/12-50 mm W
L
4-S 1
J±0.2
F
G
h±0.02
T
C±0.2
E±0.02
4-S 2
NOTE: Linear Units can also be supplied with selfaligning SBE-Bushing (KBE...GUU) or stainless LMES-Bushing (KBS..GUU)
Dimensions Model no.
Inscribed circle diameter
h
E
W
L
F
G
T
Weight Basic load rating (g) N
J
C
S1
S2
T
Dynamic Static
KBA12GUU
12
15
22
44
39
30
24.5 8
33
26
M5
4.3
12
120
520
740
KBA16GUU
16
19
25
50
44
38.5
32.5 9
36
34
M5
4.3
12
200
590
910
KBA20GUU
20
21
27
54
53
41
35
11
40
40
M6
5.2
12
270
880
1400
KBA25GUU
25
26
38
76
67
51.5
42
12
54
50
M8
7
18
600
1000
1600
KBA30GUU
30
30
39
78
76
59.5
49
15
58
58
M8
7
18
776
1600
2800
KBA40GUU
40
40
51
102 90
78
62
20
80
60
M10
8.7
25
1590
2200
4000
KBA50GUU
50
52
61
122 110
102
94
25
100 80
M10
8.7
25
3340
3900
8100
Other types on request
9
Linear ball bearing units
Open type KBA...GUUOP/16-50 mm W
L C±0.2
4-S 1
F
h±0.02
T
J±0.2
E±0.02
h1 y
Dimensions Model no.
KBA16GUUOP KBA20GUUOP KBA25GUUOP KBA30GUUOP KBA40GUUOP KBA50GUUOP
Inscribed circle diameter
16 20 25 30 40 50
Basic load rating N
W
F
L
h
E
h1
y
J
C
S1
T
Dynamic Static
45 48 60 70 90 120
33 39 47 56 72 92
45 50 65 70 90 110
20 23 27 33 42 53
22.5 24 30 35 45 60
10 10 11.5 14 19 23
80 60 60 60 60 60
32 35 40 50 65 94
30 35 40 50 65 80
M5 M6 M6 M8 M10 M10
12 12 12 18 20 20
590 880 1000 1600 2200 3900
Other types on request
10
910 1400 1600 2800 4100 8100
Linear ball bearing units
Type LMEK..UU/12-40 mm h .D P.C
d2
d
d1
D1
K
D
H L
LMEK..UU
Dimensions Model no.
LMEK12UU LMEK16UU LMEK20UU LMEK25UU LMEK30UU LMEK40UU
No. of ball rows
4 5 5 6 6 6
Basic load rating N
d
D
L
D1
K
H
12 16 20 25 30 40
22 26 32 40 47 62
32 36 45 58 68 80
42 46 54 62 76 98
32 35 42 50 60 75
6 6 8 8 10 13
P.C.D
d1 x d2 x h
Dynamic
Static
32 36 43 51 62 80
4,5 4,5 5,5 5,5 6,6 9
520 590 880 1000 1600 2200
790 910 1400 1600 2800 4100
x x x x x x
8 x 8 x 9,5 x 9,5 x 11 x 14 x
4,4 4,4 5,4 5,4 6,5 8,6
Other types on request
11
Linear ball bearing units long type
Type LMEK...LUU/12-40 mm
d2
d1
.D P.C
h
D
D1
d
H
K
L
LMEK..LUU
Dimensions Model no.
LMEK12LUU LMEK16LUU LMEK20LUU LMEK25LUU LMEK30LUU LMEK40LUU
No. of ball rows
4 5 5 6 6 6
Basic load rating N
d
D
L
D1
K
H
12 16 20 25 30 40
22 26 32 40 47 62
61 70 80 112 123 154
42 46 54 62 76 98
32 35 42 50 60 75
6 6 8 8 10 13
Other types on request
12
P.C.D
d1 x d2 x h
Dynamic Static
32 36 43 51 62 80
4.5 x 8.0 x 4.4 4.5 x 8.0 x 4.4 5.5 x 9.5 x 5.4 5.5 x 9.5 x 5.4 6.6 x 11 x 6.5 9.0 x 14 x 8.6
657 1230 1400 1560 2490 3430
1200 2350 2750 3140 5490 8040
Shaft blocks
SK 12-40 mm E±0.05
F
P
G
h±0.02
2-S
L
B W
Model no. circle diameter
SK12 A SK16 A SK20 A SK25 A SK30 A SK40 A
12 16 20 25 30 40
Weight (g) h
W
E
B
P
S
G
F
L
23 27 31 35 42 60
42 48 60 70 84 114
21 24 30 35 42 57
32 38 45 56 64 90
20 25 30 38 44 60
5.5 5.5 6.6 6.6 9 11
6 8 10 12 12 15
38 44 51 60 70 96
14 16 20 24 28 36
30 40 70 130 180 420
SHF 12-40 mm W B
L T
G F
2S
Model no.
SHF12 SHF16 SHF20 SHF25 SHF30 SHF40
circle diameter
12 16 20 25 30 40
Weight (g) W
L
T
F
G
B
S
47 50 60 70 80 102
13 16 20 25 30 40
7 8 8 10 12 16
28 31 37 42 50 67
25 28 34 40 46 56
36 40 48 56 64 80
5,5 5.5 7 7 9 12
20 27 40 60 110 510
13
Shaft mounted at shaft support
Type SSU/12-50 mm
d
H
d1 H1 A1 A
C
G
Dimensions Model no.
SSU12W SSU16W SSU20W SSU25GW SSU25W SSU30W SSU30G2W SSU40W SSU50W
d
A
H
A1
C
G
d1
H1
12 16 20 25 25 30 30 40 50
40 45 52 57 57 69 69 73 84
22 26 32 36 36 42 42 50 60
29 33 37 42 42 51 51 55 63
37.5 50 50 60 100 75 100 100 100
75 100 100 120 200 150 200 200 200
4,5 5,5 6,6 6,6 6,6 9,0 9,0 9,0 11,0
5 5 6 6 6 7 7 9 9
Example.: SSU16 W = Standard hardened shaft + shaft support SSU16 WV = Chromium plated hardened shaft + shaft support SSU16 WRB = Stainless steel hardened shaft + shaft support Length of support according to customer application. Ordering ex.: SSU16 WRB-1600 shaft stainless steel mounted at shaft support total length 1600 m/m. Other types on request
14
SHAFT SUPPORT in aluminium with mounting holes
FTSN Flange Type Dimensions Model no.
DIimensions mm
d
A
H
A2
A3
H1
A1
d1
C
G
K
FTSN12G FTSN16G FTSN20G FTSN25G FTSN30G FTSN40G FTSN50G
12 16 20 25 30 40 50
40 45 52 57 69 73 84
22 26 32 36 42 50 60
5,4 7 8.1 10.3 11 15 19
15 19 23 26 29 36 40
5 5 6 6 7 8 9
29 33 37 42 51 55 63
4,5 5.5 6.6 6.6 9 9 11
37,5 50 50 60 75 100 100
75 100 100 120 150 200 200
M4x20 M5x20 M6x25 M8x30 M10x35 M10x40 M12x45
Mounting dimensions mm
Standard section length L=600 mm Support rails can be supplied, upon request, with or without mounting holes and in length different than standad (Lmax=6000 mm)
FTSN FTSU D
D !
! +
+ D
(
(
(
(
( #
! ! !
'
D
'
! ,
!
ÂŞ
FTSU Low Type Dimensions Model no.
DIimensions mm
d
A
H
A1
A2
H1
K
d2
H2
C
G
FTSU16G FTSU20G FTSU25G FTSU30G FTSU40G
16 20 25 30 40
14 17 21 23 30
18 22 26 30 39
7 8.5 10.5 11.5 15
7 8.1 10.3 11 15
3 3 3 3 4
M5 M6 M8 M10 M12
5.5 6.6 9 11 13.5
19 23 28.5 32 39.5
37.5 37.5 37.5 50 50
100 100 75 120 200
Mounting dimensions mm
Standard section length L=600 mm Support rails can be supplied, upon request, with or without mounting holes and in length different than standad (Lmax=6000 mm)
15
Technical section
Lifetime calculation Dynamic load rating C The dynamic load rating C is a load of constant magnitude under which 90% of a statistically significant number of apparently identical bearings would reach a theoretical life of 50 km without the apparent appearance of metal fatigue. Static load rating Co The static load rating Co is defined as the load that would cause a permanent deformation equal to 1/10.000 of the ball diameter at the most stressed contact point. Life of a linear ball bearing Repeated stresses onto the contact surfaces could lead to material fatigue, This will lead to the appearance of surface pitting. The life of the unit is defined as the duration before the appearance of pitting. Rated life (L) The rated life L is the total traveled distance which 90% of a statistically significant number of apparently identical bearings would reach under the same operating conditions without the apparent appearance of metal fatigue. L = (C/P)3 · 50 (1) L = rated life (km) C = dynamic load ratings (N) P = equivalent dynamic load (N) When a system is subjected to a load equal to the dynamic load rating C the resulting life equal the rated life (50 km). The theoretical life of a linear bearing is affected by the load and by the operating conditions (temperature, vibration, shock, load distribution, etc.) In such cases the theoretical life is calculated with the help of equation 2. L = (fc · C / fw · P)3 · 50 (2) L = rated life (km) C = dynamic load ratings (N) P = equivalent dynamic load (N) fc = Contact coefficient fw = Load factor The following equation (3) allows the conversion of the rated life in hours. Lh = L · 103 / (2 · Ls · n1 · 60) (3) Lh = rated life (hours) Ls = stroke length (m) L = rated life (km) n1 = operating frequency (stroke/min)
16
technical section
Mounting Tolerances The table below shows the tolerances to be used for a proper bearing installation. They insure a precise and smooth motion. Recommended mounting tolerances for SBE-LME-LMES-KH bushings. Housing Material
Housing tolerance
Steel/cast iron
H7
Alluminum/alloy
K7
Lifetime calculation Contact factor (fc) Load biasing, attributed to mounting errors and multiple bearing assemblies can be accounted for by using the coefficient in table. Number of bearings for shaft
Contact factor
1 2 3 4 5
1.00 0,81 0,72 0,66 0,61
Load factor (fw) The loads acting on the linear units include payload, inertial effects during acceleration and deceleration as well as moment loads. All of these factors are difficult to assess and are further complicated by the potential presence of shocks and vibrations. A more practical solution involves the use of the coefficients in table.
Operating conditions
fw
Low speed operations (< 15m/min) without shockloads
1 - 1,5
Medium speed operations (60m/min) without shockloads
1,5 - 2
High speed operations (> 60m/min) without shockloads
2 - 3,5
17
technical section
Lifetime calculation Static safety factor For applications with a high requirement for accuracy and smooth running, the static safety factor fs should be higher than the values shown in table to prevent permanent deformation at the contact points. fs = fs = Po = Co =
Co Po static safety factor static equivalent load (N) static load rating (N)
Operating conditions
fs
Shafts subjected to small deflections and low shocks
1÷2
Elastic deflection can cross load the units
2÷4
System subjected to shock & vibration
3÷5
The magnitude of the friction force is affected by several factors. The type of bearing, the operating conditions, the type and quantity of the lubricant, the presence or lack of seals all impact the overall frictional behaviour. Standard seals can add between 2 and 5 N to the overall friction force. The magnitude of the coefficient of friction depends upon the operating conditions such as load, moments and/or preload. Table below shows the dynamic coefficient of friction for each type of bearing under normal operating condition (P/C = 0.2) and proper assembly. Type of bearing
Friction coefficient
KH
0.004 to 0.006
LME/SBE
0.002 to 0.003
Operating temperature The operating temperature ranges of the various bearings are shown in table below. Should the operating temperature exceed the limits shown in the table, please contact Rollco. Stainless steel units, without seals, can operate between -20/+120 deg. C. Bearing type
Operating temperature
HK
-20 to + 120°C
LME/LMES/SBE
-20 to + 110°C
18
Precision Shaft
Technical section The following tables give a complete information of materials used for the production of Precision Shafts and their chemical-phisical characteristics.
Used Material Typology W A) Ck55 (1.1203)
WRB X46Cr13 (1.4034)
B) Cf53 (1.1213)
WV A) Ck55 (1.1203) B) Cf53 (1.1213)
Tensile Strength [N/mm2] W
WRB
WV
550-750
650-800
**
Materials chemical composition [%] W
WRB
WV
A) C 0.57-0.65 Si 0.15-0.35 Mn 0.6-0.9
C 0.42-0.5 Si 0.7-1.00 Mn 0.7-1.0
A) C 0.57-0.65 Si 0.15-0.35 Mn 0.6-0.9 Cr 12.5-14.5
B) C 0.50-0.57 Si 0.15-0.35 Mn 0.4-0.7
B) C 0.50-0.57 Si 0.15-0.35 Mn 0.4-0.7
Surface hardness W
WRB
WV
62Âą2 HRc
55Âą2 HRc
800-1100 HV (Cromo)
W
WRB
WV
It is the most commonly used As a ball bushing race flow; it is hard on surface.
Material used for its resistance Characteristics similar to W type. but to corrosion. particularly resistent to atmospheric agents corrosion thanks to a chrome coating.
Applications
19
Precision Shaft
Hardened and ground
t2
tp=80% a 1µm Ra=0,25
t3/1000
W
d
t1
Shaft Diameter d
Weight per meter
mm
kg
5 6 8 10 12 14 16 20 25 30 40 50 60 80
0.15 0.22 0.39 0.61 0.89 1.21 1.57 2.45 3.83 5.51 9.80 15.3 22.1 39.2
Shaft code number
W W W W W W W W W W W W W W
Other types on request
20
5 6 8 10 12 14 16 20 25 30 40 50 60 80
Hardening depth Rht(max) DIN6773
Standard tolerance ISO h6
Roundness Parellelism (circular) (cylindric) t1 t2
Straightness t3
mm
µm
µm
µm
µm
0.8 0.8 1.0 1.0 1.3 1.3 1.6 1.6 1.8 2.0 2.5 3.0 3.0 3.0
0 0 0 0 0 0 0 0 0 0 0 0 0 0
4 4 4 4 5 5 5 6 6 6 7 7 8 8
6 6 6 6 8 8 8 9 9 9 11 11 13 13
300 300 300 300 200 200 200 100 100 100 100 100 100 100
-
8 8 9 9 11 11 11 13 13 13 16 16 19 19
Precision Shaft
Hardened and ground stainless steel
t2
tp=80% a 1µm Ra=0,25
t3/1000
WRB
d
t1
Shaft Diameter d
Weight per meter
mm
kg
5 6 8 10 12 14 16 20 25 30 40 50 60
0.15 0.22 0.40 0.62 0.89 1.21 1.58 2.47 3.85 5.55 9.87 15.41 22.2
Shaft code number
WRB WRB WRB WRB WRB WRB WRB WRB WRB WRB WRB WRB WRB
5 6 8 10 12 14 16 20 25 30 40 50 60
Hardening depth Rht(max) DIN6773
Standard tolerance ISO h6
Roundness (circular) t1
Parellelism (cylindric) t2
Straightness t3
mm
µm
µm
µm
µm
0.7 0.7 0.9 1.1 1.3 1.5 1.6 1.8 2.0 2.4 2.6 2.9 3.0
0 0 0 0 0 0 0 0 0 0 0 0 0
4 4 4 4 5 5 5 6 6 6 7 7 8
5 6 6 6 8 8 8 9 9 9 11 11 13
300 300 300 300 200 200 200 100 100 100 100 100 100
-
8 8 9 9 11 11 11 13 13 13 16 16 19
Other types on request
21
Precision Shaft
Hardened and ground/Chromium plated
t2
tp=80% a 1µm Ra=0,25
t3/1000
WV
d
t1
Shaft Diameter d
Weight per meter
mm
kg
10 12 16 20 24 25 30
0.62 0.89 1.58 2.47 3.55 3.85 5.55
Shaft code number
WV WV WV WV WV WV WV
Other types on request
22
10 12 16 20 24 25 30
Hardening depth Rht(max) DIN6773
Standard tolerance ISO h7
Roundness (circular) t1
Parellelism (cylindric) t2
Straightness t3
mm
µm
µm
µm
µm
1.0 1.3 1.6 1.6 1.8 1.8 2.0
0 0 0 0 0 0 0
6 8 8 9 9 9 9
10 12 12 12 12 12 12
300 200 200 100 100 100 100
-
15 18 18 21 21 21 21
OnE PartnEr fOr LInEar COMPOnEntS
OnE PartnEr fOr LInEar COMPOnEntS
COMPaCt raIL: No more problems with parallelism. Low noise guiding with lifetime lubricated bearings.
StaInLESS: Stainless is a simple and cost effective linear bearing-system.
BaLL SCrEwS: Cylindrical and flange-nut.
EaSy raIL: The strong solution for short strokes.
tELESCOPIC raIL: Heavy. The strongest solution for extraction.
tELESCOPIC raIL: Light. Telescopic systems for smooth movement. Steel and aluminium.
HEaVy LInE: Complete unit with belt.
LInEar raIL SyStEM SyStEM: Monorails. Compatible dimension. Very competitive product-range.
MInIaturE LInEar guIDES: Range from 3 mm up to 15 mm.
ECO LInE: The simple solution for shields and small loads.
unI LInE: Complete unit saves time and money.
23
Rollco AB Box 22234 路 Pinnmogatan 1 250 24 Helsingborg Sweden Tel. +46 42 150040 路 Fax +46 42 150045 www.rollco.se
Rollco OY Tampereentie 1 36200 Kangasala Finland Tel. +358 3 3773 750 路 Fax +358 3 3773 757 www.rollco.fi
Ball Bearings-2006-06
Rollco A/S Bramdrupskovvej 15 6000 Kolding Denmark Tel. +45 7552 2666 路 Fax +45 7552 0708 www.rollco.dk