Tuesday, January 3, 2012

cross roller guideways cross roller guide way bearings thk won gmt rsi sbc schneeberger ina iko manufacturer dealer stockist india mumbai cross roll



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We are stockiest manufacturers importers of cross roller guides we stock imported brands in cross roller guides like HIWIN , WON , THK , INA , ABBA , SCHNEEBERGER , SKF , IKO , RSI , KLS , SBC , AMT ,rosa , GMT , PMI , EVEN CHINESE MAKE AND LOCAL INDIAN MAKE IN CROSS ROLLER GUIDES

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Cross Roller Guide Way consists of the precisely ground raceway and the roller cage, in which precision roller are incorporated at right angle to one another, is fitted into to 90v-grooved raceway machined on the race rail.
WRG Guide way is compact linear motion system with high rigidity and high accuracy as a kind of linear motion bearing with low frictional resistance, fight clearence & non-circulation method by big rollers with big contact areas as a rolling body.


WRGU Cross Roller guide is
assembled between precision table
and base WRGT is compact and
strong linear guide unit.

Cross Roller Guides are used in applications requiring high precision, such as measuring or the manufacturing of optical instruments. A Cross Roller Guide consists of linear guides that are flanked on two sides of a ball cage. In the cage, rollers are placed at right angles to each other to provide multi-directional movement. The high rigidity of SBC's Cross Roller Guide is due to the rollers long contact length. The load capacity is high, the movement is smooth, and mounting is capable in both directions.

Cross Roller Tables from are manufactured by SBC with a precisely machined bed that is mounted with a rail on one side and a Cross Roller Guide on the other to eliminate elastic deformation. The rollers in the cross roller guide can carry heavy loads and maintain a long service life. Cross Roller Tables are designed to provide high rigidity and high performance in applications such as automated assembly equipment and optical measurement devices.

In Cross Roller Guide model VR, precision rollers are orthogonally aligned one after another in a
roller cage that is combined with a dedicated rail having a raceway cut into a V-shape groove.
When two units of the Cross Roller Guide are mounted in parallel, the guide system is capable
of receiving loads in all directions. In addition, since the Cross Roller Guide can be given a preload, a clearance-free, highly rigid and smooth slide mechanism is achieved.
The Cross Roller Guide is used in the slide unit of various devices such as OA equipment and
its peripherals, measuring instruments, precision equipment including a printed-board drilling
machine, optic measuring machine, optic stage, handling mechanism and X-ray machine.
Ball Guide model VB is a low-friction, high-accuracy, finite LM system consisting of precision
steel balls, arranged in short pitches in a ball cage model B, and a dedicated rail model V.
1.1. Structure and Features of the Cross Roller Guide/Ball Guide
●Long service life, high rigidity
With a unique roller retaining mechanism, the effective contact length of the rollers is 1.7
greater than the conventional type. Furthermore, the roller pitch interval is short and a sufficient number of rollers are installed, thus increasing the rigidity by twice and the service life by
six times greater than the conventional type. As a result, a safety-oriented design against
vibrations and impact, which commonly occur in ordinary linear motion mechanisms, can be
achieved.
●Smooth motion
With Cross Roller Guide model VR, the rollers are individually held in a cage and roller pockets
formed on the cage are in surface contact with the rollers to increase grease retention. Thus,
smooth motion with little wear and friction is achieved.
●High corrosion resistance
The Cross Roller Guide model VR series and the Ball Guide model VB serie

F-3
F. Description of the Cross Roller Guide/Ball Guide
F 3 Features of the Cross Roller Guide/Ball Guide
In Cross Roller Guide model VR, precision rollers are orthogonally aligned one after another in a
roller cage that is combined with a dedicated rail having a raceway cut into a V-shape groove.
When two units of the Cross Roller Guide are mounted in parallel, the guide system is capable
of receiving loads in all directions. In addition, since the Cross Roller Guide can be given a preload, a clearance-free, highly rigid and smooth slide mechanism is achieved.
The Cross Roller Guide is used in the slide unit of various devices such as OA equipment and
its peripherals, measuring instruments, precision equipment including a printed-board drilling
machine, optic measuring machine, optic stage, handling mechanism and X-ray machine.
Ball Guide model VB is a low-friction, high-accuracy, finite LM system consisting of precision
steel balls, arranged in short pitches in a ball cage model B, and a dedicated rail model V.
1.1. Structure and Features of the Cross Roller Guide/Ball Guide
●Long service life, high rigidity
With a unique roller retaining mechanism, the effective contact length of the rollers is 1.7
greater than the conventional type. Furthermore, the roller pitch interval is short and a sufficient number of rollers are installed, thus increasing the rigidity by twice and the service life by
six times greater than the conventional type. As a result, a safety-oriented design against
vibrations and impact, which commonly occur in ordinary linear motion mechanisms, can be
achieved.
●Smooth motion
With Cross Roller Guide model VR, the rollers are individually held in a cage and roller pockets
formed on the cage are in surface contact with the rollers to increase grease retention. Thus,
smooth motion with little wear and friction is achieved.
●High corrosion resistance
The Cross Roller Guide model VR series and the Ball Guide model VB series both include types
made of stainless steel, which is highly resistant to corrosion.F-3
F. Description of the Cross Roller Guide/Ball Guide
F 3 Features of the Cross Roller Guide/Ball Guide
1. Features of the Cross Roller Guide/Ball Guide
Dedicated rail
Stopper
Ball cage
Ball
Dedicated rail
Stopper
Roller cage
Roller
Cross Roller Guide Model VR
Ball Guide Model VB
Stoppers of models V1 to
V4 have round shapes.
Fig. 1 Structure of Cross Roller Guide Model VR and Ball Guide Model VBF-5
F. Description of the Cross Roller Guide/Ball Guide
F 5 Features of the Cross Roller Guide/Ball Guide
1.2. Types and Features of the Cross Roller Guide/Ball Guide
●Cross Roller Guide Model VR
A compact, highly rigid LM system whose
roller cage holding precision rollers orthogonally aligned one after another travels by half
the stroke on a V-shaped groove formed on a
rail.
Model VR
●Ball Guide Model VB
A low- f r ict ion, highly accurate LM system
whose bal l cage holding precision bal ls in
short pitches travels by half the stroke on a
V-shaped groove formed on a rail.
Model VBF-6
Rated Loads in All Directions
The basic load ratings (CZ and C0Z) in the dimensional table in the " General Catalog -
Product Specifications," provided separately, indicate the values per rolling element in the
directions shown in Fig. 2. When obtaining the rated life, calculate the basic load ratings (C
and C0) of the actually used rolling elements from the equation below.
●For Cross Roller Guide Model VR
●For Ball Guide Model VB
C :Basic dynamic load rating (kN)
C0 :Basic static load rating (kN)
CZ :Basic dynamic load rating in the dimensional table in the " General
Catalog - Product Specifications," provided separately (kN)
C0Z :Basic static load rating in the dimensional table in the " General
Catalog - Product Specifications," provided separately (kN)
Z :Number of rolling elements used
(Number of rolling elements within the effective load range)
Static Safety Factor fS
Models VR and VB may receive an unexpected external force while it is stationary or operative
due to the generation of an inertia caused by vibrations and impact or start-up and stop. It is
necessary to consider a static safety factor against such a working load.
fS :Static safety factor (table 1)
C0 :Basic static load rating (kN)
Pc :Calculated load (kN)
C
C0
C
C0
CL
C0L
CL
C0L
CT
C0T
CT
C0T
Model VR
Model VB
Fig. 2
Table 1 Reference Values of Static Safety Factors (fS)
Lower limit
Service conditions
of fS
Machine using
the LM system
General industrial
machinery
Without vibrations or impact
With vibrations or impact
1 to 1.3
2 to 3
fS =
C0
PC
C = CL = ( ) ✕ CZ, CT = 2C
Z
2
3
4
C0 = C0L = ✕ C0Z, C0T = 2C0
Z
2
Z
2
For , truncate the decimals.
C = CL = Z ✕ CZ, CT = 2C
2
3
C0 = C0L = Z ✕ C0Z, C0T = 2C0F-7
F. Description of the Cross Roller Guide/Ball Guide
F 7 Features of the Cross Roller Guide/Ball Guide
When the basic dynamic load ratings have been obtained, the rated lives of Cross Roller Guide
model VR and Ball Guide model VB are obtained using the following equations.
●For Model VR
●For Model VB
L :Rated life (km)
(The total number of revolutions that 90% of a group of identical VR (VB) units independently operating under the same conditions can achieve without showing flaking)
C :Basic dynamic load rating (kN)
PC :Calculated load (kN)
fT :Temperature factor (see Fig 3 on page F-8)
fW :Load factor (see table 2 on page F-8)
When the rated life (L) has been obtained, if the stroke length and the number of reciprocations
per minute are constant, the service life time is obtained using the following equation.
Lh :Service life time (h)
RS :Stroke length (mm)
n1 :Number of reciprocations per minute(min
-1

Rated Life
L = ( • ) ✕ 100
fT
fW
C
PC
10
3
L = ( • )
3
✕ 50
fT
fW
C
PC
Lh =
L ✕ 10
6
2 ✕ RS ✕ n1 ✕ 60
Calculating the Service Life TimeF-8
■fT:Temperature factor
If the temperature of the atmosphere surr o u n d i n g t h e o p e r a t i n g m o d e l V R o r V B
e x c e e d s 1 0 0 ℃, t a k e i n t o a c c o u n t t h e
adverse effect of the high temperature and
multiply the basic load ratings by the temperature factor indicated in Fig. 3.
Note: If the ambient temperature exceeds 100℃, contact
.
■fW:Load factor
In general, reciprocating machines tend to
involve vibrations or impact during operation.
It is difficult to accurately determine vibrations generated during high-speed operation
and impact during frequent start-up and stop.
Therefore, when the actual load applied on
model VR or VB cannot be obtained, or when
speed and vibrations have a significant influence, divide the basic load rating (C or C0),
by the corresponding load factor in table 2 of
empirically obtained data.
Raceway temperature(℃)
100 150 200
1.0
0.9
0.8
0.7
0.6
0.5
Temperature factor fT
Fig. 3 Temperature Factor (fT)
Table 2 Load Factor (fW)
Faint
Weak
Very low
V≦0.25m/s
Slow
0.25<V≦1m/s
1 to 1.2
1.2 to 1.5
Vibrations/impact Speed (V) fWF-9
F. Description of the Cross Roller Guide/Ball Guide
F 9 Features of the Cross Roller Guide/Ball Guide
The accuracy of the dedicated rail for the Cross Roller Guide is classified into high grade (H)
and precision grade (P) as shown in table 3.
Table 3 Accuracy Standards for Dedicated Rail Model V
Accuracy symbol High grade
H P
Precision grade
Symbol
Item
Parallelism of the raceway
against surfaces Å and ı
Dimensional tolerance in height E
Difference in height E
(note)
Dimensional tolerance
in width M
±0.02
0.01
0
–0.2
As per Fig. 5
±0.01
0.005
0
–0.1
Unite: mm
B
A
E
M
Note: The difference in height E applies to four rails used on
the same plane.
Fig. 4
Rail length L(mm) 0
16
12
8
4
0
200 400 600 800 1000
Parallelism of the raceway(μm )
High grade(H)
Precision grade(P)
Fig. 5 Rail Length and Parallelism of the RacewayF-10
The roller cage and the ball cage move half
the travel distance of the table in the same
direction. To prevent the cage from overhanging f rom the raceway base when the
cage length is "R" and the stroke length is
"Rs," the rail length (Lk) must be at least the
following.
Lk≧R+
RS
2
2. Precautions on Using the Cross Roller Guide/Ball Guide
Rail Length
The cage, which retains rollers (or balls), demonstrates extremely accurate motion. However,
it may be offset as affected by driving vibrations, inertia or impact.
If using the Cross Roller Guide or Ball Guide in the following conditions, contact .
●Vertical use
●Pneumatic cylinder drive
●Cam drive
●High-speed crank drive
●Under a large moment load
●Butting the guide's external stopper with the table
Offset of the Cage
RS
R
Lk
Lk
RS
2
Lk
a Disassembling components may cause dust to enter the system or degrade mounting accuracy of parts. Do not disassemble the product.
s Dropping or hitting the Cross Roller Guide/Ball Guide may damage it. Giving an impact to
the Cross Roller Guide/Ball Guide could also cause damage to its function even if the product looks intact.
Handling
a Thoroughly remove anti-corrosion oil and feed lubricant before using the product.
s Do not mix lubricants of different physical properties.
d In locations exposed to constant vibrations or in special environments such as clean rooms,
vacuum and low/high temperature, normal lubricants may not be used. Contact for
details.
f When planning to use a special lubricant, contact before using it.
LubricationF-11
F. Description of the Cross Roller Guide/Ball Guide
F 11 Precautions on Using the Cross Roller Guide/Ball Guide
Stoppers are attached to the rail ends in order to prevent the cage from falling off. Note, however, that frequently colliding the cage with the stopper may cause wear of the stopper and
loosening of the stopper fastening screws, and may cause the cage to fall off.
Stopper
As a means to prevent foreign matter from entering the Cross Roller Guide or the Ball Guide,
dust prevention accessories for the side faces as shown in Fig. 1 are available. For dust prevention in the front and rear directions, consider using a bellows or a telescopic cover.
Dust Prevention
Labyrinth cover Wiper seal
Fig. 1 Dust Prevention Methods
a If foreign matter such as dust or cutting chips adheres to the product, replenish the lubricant
after cleaning the product with pure white kerosene.
s When desiring to use the system at temperature of 100℃ or higher, contact in advance.
d When using the product in locations exposed to constant vibrations or in special environments such as clean rooms, vacuum and low/high temperature, contact in advance.
Precautions on Use
When storing the Cross Roller Guide/Ball Guide, enclose it in a package designated by
and store it while avoiding high temperature, low temperature and high humidity.
Storage

Compact design, high precision and rigidity, and wide range of permissible load
- It's used widely in various precision instruments and machineries
- Miniature Type

Compact design, high precision and rigidity, and wide range of permissible load.
- It's used widely in various precision instruments and machineries.

Semiconductor Equipment, LCD production line applicable anytime.
Slide Block(Customized)

The smooth surfaces are created from sanding and anodizing finishes, expand the possibilities of using wider ranges of colors to be applied.
- The use of aluminum reduces the process and simplified the quality.
- Any sizes can be custom made other than the company's standard marked sizes: 40x40 /60x60/ 70x70/ 80x80/ 100x100

Rolls very smoothly.
Smooth rolling for straight movement bearing.
- Excellent Deal on the Price/Customer Friendly.
Cut down all the buddbly costs by producing main parts.
- Faster and accurate corresponding ability
Excellent ability to correspond everything according to what users exactly want through direct conversations with technical designers.
- Fast delivery.
Uniform Type X-Y Table(Customized) MXYT-3938
Uniform type, turn type, applied with cross roller guide
- Stepping, timing belt, driving type
- Compact design and easy installation
- It's highly precise due to processing with unified structure of body and orbiting plane.
- It's a table that is applied with ball bearing turn method and the caterpillar motion is possible.
- Stroke : X axis(390mm), Y axis (380mm)
- Spec.: X axis (506mm x 180mm x 26mm), Y axis(470mm x 90mm x 44mm)


Cross Roller Guide(MVR Series)

Cross Roller Guide(MVR/Roller cage)

Needle Roller/Cage


www.vardhmanbearings.com

we at vardhman bearings are importers stockiest dealers manufacturer of cross roller guide these cross roller we stock brands like THK japan , WON KOREA , KLS KOREA , LEE SBC , ABBA , IKO , INA , SCHNEEBERGER , HIWIN , RSI , AMT , PMI , INA , IKO , CHINESE CROSS ROLLER GUIDES , KOREAN CROSS ROLLER GUIDE WAYS

WE STOCK ALL SIZES TYPE IN CROSS ROLLER GUIDES

Thanking u

Jigesh shah
For vardhman bearings
9819824531
9892432411


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