slide guide

SLIDE BUSH
BLOCK SERIES
SPECIFICATIONS
SMA・AK・SMB・SWA Type
This type is the most commonly used standard type.
The housing is made of aluminum alloy. The wide
(W) type is also available for SMA and AK types.
SMJ ・ SWJ Type
Clearance-adjustment is achieved by creating a slit
on the SMA/SWA type housing. Less clearance
between block and shaft results in higher positioning
accuracy by tightening the adjustment screw.
RB ・RBW Type
The housing is made of ABS resin for light-weight
and low-cost. Inside is a standard slide bush of a
resin retainer type with seals.
Metric Series
SMA type
SMA-W type
AK type
SMP Type
The housing has a self-aligning feature. This feature
will absorb inaccuracy of the installation base so
that a smooth movement is expected.
SME・SMD・SWD Type
Open type housing allows a support from below so
that a deflection of the shaft is minimized for high
loading or long-stroke applications. The wide(W)
type is also available for SME type.
CE・CD Type
This type is a unit of block(s), shaft, and support
rail that contributes to a total cost reduction. The
maximum length is 2,000mm for the support rail
and for the shaft the maximum length is 4,500mm.
AK-W type
SMB type
Series
The NB slide bush is available in three primary
dimensional series, each with different dimensions
and tolerances depending on the location of use.
Please select the series that is most appropriate for
your location.
Allowable Load
N B slide bushes are categorized into three
functional types depending on the number and
location of retainers: single, double, and triple.
Table C-6 shows load ratings and static moment in
comparison. The single type uses only one retainer,
so when a moment load is to be applied, the double
or triple type is recommended.
Table C-5 Series and Use Location
series
location
Japan Asia Europe
SM
metric GM
◎ ◎ ○
KB ○ ○ ◎
inch SW ○ ○ ○
◎ generally used
○ rarely used
Table C-6 Load Comparison
type
single
long
GM-W
SM double
triple
basic dynamic
load rating
1
1.3
1.6
1.6
1.6
basic static
load rating
1
1.8
2
2
2
North
America
○
○
◎
allowable
static moment
1
approx. 4
approx. 4
approx. 6
approx.21
※ The single type is designated as "1" for comparison purposes.
SLIDE BUSH
P.C-128
SMP type
P.C-138
RB type
P.C-130
SMJ type
P.C-140
CE type
SME type
P.C-132
P.C-142
P.C-134
SME-W type
P.C-144
CD type
SMD type
P.C-136
P.C-146
Material
The outer cylinder of standard type is made of
bearing steel and the outer cylinder of anti-corrosion
type is made of Martensitic stainless steel. The
retainer is available in steel (stainless steel for anticorrosion),
and resin for low acoustic operation. The
steel retainer is made of one plate (seamless type).
Table C-7 Operating Environment Temperature
outer cylinder
steel
stainless
material
retainer
steel
resin
steel
resin
temperature range
−20℃〜110℃
−20℃〜 80℃
−20℃〜140℃*
−20℃〜 80℃
* If a seal is used in the stainless steel slide bush, the
temperature is up to 120℃ . Please contact NB if a temperature
range exceeds 140℃ .
P.C-148
P.C-150
Inch Series
SWA type SWJ type SWD type RBW type
P.C-152
Seal
The seals prevent dust from entering the slide bush
in order to retain the motion accuracy, resulting in
a long life time. The UU type is a standard option
that has seals on both sides. The U type has
a seal on one side only and is available for the
standard, clearance adjustable, and open types.
Nitril rubber, which has low wear and good sealing
characteristics, is used as the seal material.
* Resin seals are used for GM series.
Figure C-3 Seal Profile
seal
P.C-154 P.C-156 P.C-158 P.C-160
C-6
C-7