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Miniature LM Guide
Type RSR..Z / RSR..WZ
Miniature LM guide type RSR...Z is an epoch making LM guide which has achieved smoothness, quiet and comfortable sound in the same dimension as the conventional product.
Miniature LM Guide Type
RSR..Z/RSR...W is an extremely small sized linear motion bearing which incorporates the largest practical diameter balls in the minimum space to provide a large load rating and offers excellent durability to
small reciprocating motion.
To minimize the effect of the moment of inertia resulting from the increased speed, the LM block is designed for the utmost compactness, which also meets the user's demands for lighter, thinner, shorter and smaller units. |
Lightweight
& Low Inertia
Lightweight resin is used for a part of the LM block body. This low inertia type decreases the mass of block by
approximately 28% compared to that of conventional RSR...V type and W
type
Smoother Motion
The pieces in the form of the character R located at the ball return portions are formed by monolithic molding including the LM block. Therefore, dimensional errors are
minimized, and the balls circulate smoothly and infinitely.
Excellent Corrosion Resistance
The LIvl block, LM rails and the balls are in stainless steel with excellent corrosion resistance.
This makes this type of LM guide also suitable for the use in clean rooms.
Quietness
The unload zones in which the rolling balls which are free from the loads applied
to the block are molded in resin and the absence of any contact between adjacent metal parts results in
much quieter movement.
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| Compared to the Cross Roller Guide and Ball Slide, which are of limited motion type, the Miniature
RSR LM Guide is simple in construction, thus being more compact and inexpensive.
This unit Unit offers very low variation in running smoothness, providing
extremely light movement.
This ultra compact configuration
as shown below circulates the balls in the compact casing, providing unlimited linear motion without restriction of the travel. The LM block is designed to give stiffness in limited space, and, in combination with the
large diameter balls, provides high rigidity in all the directions. With
type RSR..ZW, the number of balls in load carrying zone per row is increased,
and both LM block and LM rail are widened, bringing higher
rigidity and capacity for moment loads. Compared to the Linear Motion Bearing, which must be used in two units in parallel, the Type
RSR...W can be used in a single unit, minimizing the space requirement.
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RSR-Z
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RSR-WZ
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| Loading in any of the directions can be supported.
The Type RSR..Z/RSR..ZW is a bearing which is extremely resistant to the load in the radial direction.
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Load Rating in Various Directions
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Dynamic |
Static |
| Radial |
C |
C0 |
| Lateral |
CL=0.78C |
C0L=0.70C0 |
| Reverse
Radial |
CT=0.78C |
C0T=0.71C0 |
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Moment Capacities
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Units : Nm
| Type |
MA |
MB |
MC |
| RSR 7 Z |
2.55 |
2.55 |
5.10 |
| RSR 9 Z |
5.10 |
5.10 |
10.4 |
| RSR 12 Z |
8.04 |
8.72 |
14.7 |
| RSR 15 Z |
16.5 |
17.9 |
30.2 |
| RSR 7 WZ |
5.39 |
5.39 |
15.2 |
| RSR 9 WZ |
16.3 |
16.3 |
36.0 |
| RSR 12 WZ |
17.2 |
18.6 |
47.6 |
| RSR 15 WZ |
35.2 |
38.2 |
137 |
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The following equation
gives the life of type RSR
L10=[
(Ft*Fc/Fw) * (C/Pe) ]^3*50
L10
Rated life (km)
Total distance of travel reached without flaking by 90% of a group of
the same linear motion
system that are operated independently under the same conditions.
C
Basic dynamic load rating (N)
Pe Design
load
(N)
Ft
Temperature factor (See catalog No. 200-1 AE Page 11.)
Typically 1
for standard temperature
Fc Contact Factor (See catalog No. 200-1AE Page 10.)
Typically 1 for 4 block system
Fw Load Factor (See catalog No. 200-1 AE Page 11.)
Typically 1.5-2.0 for smooth motion, no impacts
Life in Time
The
following equation can be used to convert distance to time
Lh
= L10*1000,000/ (2 * S * CPH)
LH
Life In Hours
L10 Life in km
S Stroke in mm
CPH Cycle per hour (Cycle is back and forth full
stroke)
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SINGLE EQUIVALENT
LOAD
When the LM blocks of
type SR is subjected to reverse radial and lateral loads simultaneously,
the single equivalent load can be calculated by the following equation.
PE=X'PL+Y'PT
or PE=X'PR+Y'PT
Where:
- PE = Reverse radial or
lateral single equivalent load (N),
- PL = Reverse radial load (N),
- PR = Radial load (N)
- PT = Lateral load (N), and
- X,Y = Equivalent
factors (Table below)
| Ratio
of PL to PT
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PE
| X
| Y
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| PR/PT
>1
| Radial
equivalent load
| 1
| 0.83
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| PR/PT<
I
| Lateral equivalent
load
| 1.20
| 1
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| Ratio
of PL to PT
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PE
| X
| Y
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| PL/PT
>1
| Reverse radial
equivalent load
| 1
| 0.99
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| PL/PT<
I
| Lateral equivalent
load
| 1.01
| 1
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| Applications include IC and LSI production equipment, testing machines, OA equipment slides, floppy disk reading systems, wafer conveying systems, printed circuit board assembling tables, medical equipment, IC bonder feed mechanisms, and robot arm end mechanisms. |
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Radial Clearance
Specifications
Units : μm
| Type |
Radial
Clearances |
| Normal |
C1 |
| RSR 7 Z |
±2 |
-3~0 |
| RSR 9 Z |
±2 |
-4~0 |
| RSR 12 Z |
±3 |
-6~0 |
| RSR 15 Z |
±5 |
-10~0 |
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Units : mm
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RSR 7 Z |
RSR 9 Z |
RSR 12 Z |
RSR 15 Z |
RSR 7 WZ |
RSR 9 WZ |
RSR 12 WZ |
RSR 15 WZ |
| (L0) |
40
55
70
85
100
130 |
55
75
95
115
135
155
175
195
275
375 |
70
95
120
145
170
195
220
245
270
320
370
470
570 |
70
110
150
190
230
270
310
350
390
430
470
550
670
870 |
50
80
110
140
170
200
260
290 |
50
80
110
140
170
200
260
290
320 |
70
110
150
190
230
270
310
390
470
550 |
110
150
190
230
270
310
430
550
670
790 |
| F |
15 |
20 |
25 |
40 |
30 |
30 |
40 |
40 |
| G |
5 |
7.5 |
10 |
15 |
10 |
10 |
15 |
15 |
| Maximum |
300 |
1000 |
1340 |
1430 |
400 |
1000 |
1430 |
1800 |
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| 1: Number of blocks
per rail |
6: Seal Configuration
UU End seals only - Standard |
| 2: Series Type - RSR |
7: Preload
Blank for normal, C1 for light preload |
| 3: LM Guide Size |
8: Rail Length in mm |
4: Block Style
Z Narrow Style
WZ Wide Style |
9: Accuracy Grade
Blank for normal,
H for High Grade
P for Precisio |
| 5: Stainless steel block
(Standard) |
10: Stainless steel
rail (Standard) |
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Retainer Clip
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Retainer Clip Dimensions
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Units : mm
| Size |
A |
B |
C |
| RSR 7 Z |
10.5 |
5 |
8.7 |
| RSR 9 Z |
13 |
6 |
9.5 |
| RSR 12 Z |
14 |
7 |
11.5 |
| RSR 15 Z |
17.5 |
7 |
13.5 |
| RSR 7 WZ |
18 |
6 |
9.2 |
| RSR 9 WZ |
20 |
6 |
11.5 |
| RSR 12 WZ |
26.5 |
7 |
12.5 |
| RSR 15 WZ |
44.5 |
7 |
13.5 |
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| Type RSR..Z
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Model |
Block
& Assembly Data |
Rail
Data |
Load
Data |
| M |
W |
L |
B |
C |
Sxl |
M1 |
W1 |
F |
d1xd2xh |
C
(KN) |
Co
(KN) |
| RSR 7 ZM |
8 |
17 |
23.4 |
12 |
8 |
M2×2.5 |
4.7 |
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15 |
2.4×4.2×2.3 |
0.88 |
1.37 |
| RSR 9 ZM |
10 |
20 |
30.8 |
15 |
10 |
M3×2.8 |
5.5 |
|
20 |
3.5×6×3.3 |
1.47 |
2.25 |
| RSR 12 ZM |
13 |
27 |
35.0 |
20 |
15 |
M3×3.2 |
7.5 |
|
25 |
3.5×6×4.5 |
2.65 |
4.02 |
| RSR 15 ZM |
16 |
32 |
43.0 |
25 |
20 |
M3×3.5 |
9.5 |
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40 |
3.5×6×4.5 |
4.41 |
6.57 |
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| Type RSR..WZ
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Model |
Block
& Assembly Data |
Rail
Data |
Load
Data |
| M |
W |
L |
B |
C |
Sxl |
M1 |
W1 |
F |
d1xd2xh |
C
(KN) |
Co
(KN) |
| RSR 7 WZM |
9 |
25 |
31.5 |
19 |
10 |
M3×2.8 |
5.2 |
|
30 |
3.5×6×3.2 |
1.37 |
2.16 |
| RSR 9 WZM |
12 |
30 |
39 |
21 |
12 |
M3×2.8 |
7.5 |
|
30 |
3.5×6×4.5 |
2.45 |
3.92 |
| RSR 12 WZM |
14 |
40 |
44.5 |
28 |
15 |
M3×3.6 |
8.5 |
|
40 |
4.5×8×4.5 |
4.02 |
6.08 |
| RSR 15 WZM |
16 |
60 |
55.5 |
45 |
20 |
M4×4.5 |
9.5 |
|
40 |
4.5×8×4.5 |
6.66 |
9.80 |
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with respect to 
with respect to 
