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Linear Guides - For heavy load, with dust protection seals or metal scrapers. (SX2WD28G)

Linear Guides - For heavy load, with dust protection seals or metal scrapers. SX2WD28G

Linear guides of more robust sizes ideal for heavy loads, with the option of selecting them with standard block, or wide blocks. Configurable with seals for dust protection or with metal scrapers for solid bodies on the rail. Selectable lubricant type, even with MX constant lubrication accessory. Blocks and rails cannot be purchased separately.

  • inCAD Components

(i)Caution

  • Delivery times for some of our products may be delayed as national government authorities have imposed limit of capacity at our production sites.
Linear Guides - Heavy Load - Dust Resistant:Related Image
[ ! ]For L Dimension Configurable Type, G dimensions differ from those shown in the table below. For details, see >> Click here.
・Materials
 TypeMX
(Lubrication Units)
L DimensionNumber of Blocks[ M ]Material
[ H ]Hardness
Double-SealedWith Metal Scrapers
StandardSXRDSXRKBlank: None
-MX : Provided
Selectable1Carbon Steel

58HRC~
SX2RDSX2RK2
SXRDLSXRKLConfigurable1
SX2RDLSX2RKL2
Wide BlockSXWDSXWKSelectable1
SX2WDSX2WK2
SXWDLSXWKLConfigurable1
SX2WDLSX2WKL2
Heat Resistant Temperature: -20~80°C
 

Specifications

Linear Guides - Heavy Load - Dust Resistant:Related Image
[ ! ]For L Dimension Configurable Type, G dimensions differ from those shown in the table below. For details, see >> Click here.
 Part NumberLBlock DimensionGuide Rail Dimension
TypeMXHWL1BCSxℓL2KTCbGrease FittingH1W1W2CaCounterbored HoleFG
StandardMXMounting HoleET1d1xd2xh
Standard(1 block)
SXRD
SXRK
SXRDL
SXRKL
(2 blocks)
SX2RD
SX2RK

SX2RDL
SX2RKL
Blank: None
-MX : Provided
24160(220)
~1480
3462
(58.6)
71.6
(68.2)
2626M4x7412070.85M5xP0.86512.5159.50.53.5x6x4.56020
28220
~1960
4273.4
(69)
83
(78.6)
3232M5x847.622.57.51M6xP0.7513615.520110.66x9.5x8.56020
33220(280)
~1960
4890
(85.4)
99.6
(95)
3535M6x96126.581M6xP0.75136.8182312.50.87x11x96020
Wide Block(1 block)
SXWD
SXWK
S
XWDL
SXWKL
(2 blocks)
SX2WD
SX2WK
SX2WDL
SX2
WKL
24160(220)
~1480
5262
(58.6)
71.6
(68.2)
41264.5412070.5M5xP0.86512.51518.50.53.5x6x4.56020
28220
~1960
5973.4
(69)
83
(78.6)
49325.547.622.591M6xP0.7513615.52019.50.66x9.5x8.56020
33220(280)
~1960
7390
(85.4)
99.6
(95)
603576126.5101M6xP0.75136.81823250.87x11x96020
[ ! ]L Dimension: Dimensions in ( ) are for 2-Block Type.
[ ! ]L1 Dimension: Dimensions in ( ) are for Metal Scraper Type.
■Selectable Shortest Rail Length
HB3 (3-block)B4 (4-block)
24340400
28400460
33400520
 

Materials

 TypeMX
(Lubrication Units)
L DimensionNumber of Blocks[ M ]Material
[ H ]Hardness
Double-SealedWith Metal Scrapers
StandardSXRDSXRKBlank: None
-MX : Provided
Selectable1Carbon Steel

58HRC~
SX2RDSX2RK2
SXRDLSXRKLConfigurable1
SX2RDLSX2RKL2
Wide BlockSXWDSXWKSelectable1
SX2WDSX2WK2
SXWDLSXWKLConfigurable1
SX2WDLSX2WKL2
Heat Resistant Temperature: -20~80°C
 
Part Number-L 
SXRD28
SXRD-MX28
Linear Guides - Heavy Load - Dust Resistant:Related Image SXRD28L
Linear Guides - Heavy Load - Dust Resistant:Related Image SXRD28G
-
-
-
-
880
880
880
880

(With Lubrication Units)
(L Type Greased)
(G Type Greased)
Alternative grease types available (Except Blocks with Lubrication Units).
For Days to Ship, Price and Performance >> Click here
[ ! ]Blocks and rails are not sold as separate items. Normal Clearance Type has guaranteed radial clearances and accuracies as sets of blocks and rails.
■Precautions for Use
[ ! ]Blocks are equipped with retainers (wire) to prevent balls from derailing. For blocks, see >> Click here
[ ! ]Radial clearances and accuracies are not guaranteed if the blocks and rails are interchanged from the original set combinations.
[ ! ]Straight grooves are provided on datum planes. Be sure to match the datum lines when using.
[ ! ]Rails cannot be connected end to end.
[ ! ]Running parallelism is the value measured after the rail is mounted. (it is not the value measured before the rails are fastened with screws.)
■Others
· Filled with Lithium soap based grease (Alvania Grease S2 by Showa Shell Sekiyu K.K).
· Grease Fittings: Straight Type for H24 and Angled Type for H28 and H33.
· Grease Fitting is screw-in type, and thus, can be repositioned.
· For Operating Life Calculation >> Click here
 

Price list

Volume Discount Rate ([ ! ]Round down to nearest one cent.) P.89
Quantity1~45~1011~1516 or More
Discount RateUnit Price5%10%18%
Days to ShipStandard5 additional daysTo Be Quoted

HLUnit Price
1 block2 blocks
SXRDSXRKSXWDSXWKSX2RDSX2RKSX2WDSX2WK
241608,0709,0408,570 9,530 ----
2208,5609,5309,060 10,020 13,79015,08015,450 16,740
2809,16010,1309,660 10,620 14,39015,68016,060 17,350
3409,71010,68010,200 11,160 14,95016,24016,590 17,880
40010,31011,28010,810 11,770 15,55016,84017,200 18,490
46010,92011,89011,400 12,360 16,14017,43017,800 19,090
52011,51012,48012,010 12,970 16,74018,03018,400 19,690
58012,11013,08012,610 13,570 17,35018,64019,000 20,290
64012,71013,68013,210 14,170 17,95019,24019,600 20,890
70013,31014,28013,810 14,770 18,55019,84020,200 21,490
76013,91014,88014,400 15,360 19,15020,44020,800 22,090
82014,52015,49015,010 15,970 19,75021,04021,400 22,690
88015,17016,14015,660 16,620 20,41021,70022,060 23,350
94015,82016,79016,320 17,280 21,06022,35022,710 24,000
100016,54017,50017,030 17,990 21,77023,06023,420 24,710
112018,20019,17018,710 19,670 23,45024,74025,080 26,370
124019,54020,50020,010 20,970 24,77026,06026,410 27,700
136020,85021,82021,330 22,290 26,08027,37027,730 29,020
148022,17023,14022,660 23,620 27,39028,68029,040 30,330
282209,43010,56010,370 11,500 15,04016,49017,740 19,190
28010,08011,21011,020 12,150 15,71017,16018,400 19,850
34010,69011,82011,630 12,760 16,30017,75019,000 20,450
40011,29012,42012,240 13,370 16,90018,35019,600 21,050
46011,89013,02012,830 13,960 17,51018,96020,190 21,640
52012,49013,62013,430 14,560 18,11019,56020,800 22,250
58013,14014,27014,090 15,220 18,76020,21021,450 22,900
64013,70014,83014,630 15,760 19,31020,76022,000 23,450
70014,29015,42015,230 16,360 19,91021,36022,600 24,050
76014,84015,97015,790 16,920 20,45021,90023,150 24,600
82015,44016,57016,380 17,510 21,06022,51023,750 25,200
88016,09017,22017,040 18,170 21,72023,17024,410 25,860
94016,70017,83017,640 18,770 22,31023,76025,010 26,460
100017,35018,48018,290 19,420 22,98024,43025,660 27,110
112018,72019,85019,650 20,780 24,34025,79027,030 28,480
124020,08021,21021,020 22,150 25,70027,15028,390 29,840
136022,53023,66023,490 24,620 28,15029,60030,850 32,300
148023,96025,09024,900 26,030 29,58031,03032,260 33,710
160025,37026,50026,320 27,450 30,99032,44033,680 35,130
172026,81027,94027,750 28,880 32,41033,86035,110 36,560
184028,22029,35029,160 30,290 33,84035,29036,520 37,970
196029,64030,77030,590 31,720 35,25036,70037,960 39,410
3322010,74012,03012,070 13,360 ----
28011,45012,74012,780 14,070 17,39019,01021,030 22,650
34012,10013,39013,440 14,730 18,05019,67021,680 23,300
40012,76014,05014,100 15,390 18,71020,33022,340 23,960
46013,42014,71014,760 16,050 19,36020,98023,000 24,620
52014,07015,36015,410 16,700 20,02021,64023,660 25,280
58014,72016,01016,060 17,350 20,67022,29024,310 25,930
64015,38016,67016,720 18,010 21,32022,94024,960 26,580
70016,09017,38017,430 18,720 22,04023,66025,680 27,300
76016,86018,15018,200 19,490 22,81024,43026,440 28,060
82017,57018,86018,910 20,200 23,51025,13027,140 28,760
88018,28019,57019,620 20,910 24,23025,85027,860 29,480
94018,99020,28020,330 21,620 24,93026,55028,560 30,180
100019,75021,04021,090 22,380 25,69027,31029,330 30,950
112021,22022,51022,560 23,850 27,17028,79030,800 32,420
124022,75024,04024,090 25,380 28,70030,32032,340 33,960
136025,33026,62026,670 27,960 31,27032,89034,910 36,530
148026,96028,25028,300 29,590 32,90034,52036,540 38,160
160028,58029,87029,920 31,210 34,52036,14038,160 39,780
172030,20031,49031,540 32,830 36,15037,77039,790 41,410
184031,83033,12033,170 34,460 37,78039,40041,420 43,040
196033,45034,74034,790 36,080 39,39041,01043,030 44,650
■L Dimension Configurable Type (1mm Increment)
HUnit Price
1 block2 blocks
SXRDLSXRKLSXWDLSXWKLSX2RDLSX2RKLSX2WDLSX2WKL
241,9501,9501,9501,9501,9501,9501,9501,950
282,1102,1102,1102,1102,1102,1102,1102,110
332,2702,2702,2702,2702,2702,2702,2702,270
■MX (Lubrication Unit) Unit Price
HUnit Price
1 block2 blocks
241,7003,400
281,9003,800
331,9003,800

Alterations

Linear Guides - Heavy Load - Dust Resistant:Related Image
M3xP0.5 Depth 5 Tapped HoleStopper Plates Details >> Click here

More Information

Linear Guides - Heavy Load - Dust Resistant:Related Image
Linear Guides - Heavy Load - Dust Resistant:Related Image
Linear Guides - Heavy Load - Dust Resistant:Related Image
Linear Guides - Heavy Load - Dust Resistant:Related Image
Linear Guides - Heavy Load - Dust Resistant:Related Image
see >> Click here
Linear Guides - Heavy Load - Dust Resistant:Related Image
Blocks with Lubrication Units MX provide long term maintenance-free operation. Reduces maintenance cost. Most suitable where the design does not allow lubrication. For details see >> Click here

Technical Information

Characteristics of Linear Guides

  • Linear guides utilize steel balls that roll on ground raceways, and the balls are recirculated using plastic return caps.
  • End seals prevent foreign materials from entering into the blocks.
  • Load ratings are the same for all four directions (radial, reverse-radial, and lateral directions). Can be used in any orientation.

Preload (Radial Clearance)

Type of guidePreloadHeight
H Dimension
Radial
Clearance (µm)
Linear guide medium/heavy loadNormal clearance24-4 ~ +2
28-5 ~ +2
33-6 ~ +3
Light preload24,28-4 ~ 0
30 ~ 42-5 ~ 0
42*-7 ~ 0

* marked size is for Ultra Heavy / Extra Super Heavy Load

  • Clearance and preload of MISUMI Linear Guides are controlled with minute ball size adjustments.
  • Increased rigidity and reduced elastic deformation will result by preloading (negative clearance).
  • In general, selecting some preloads would have a positive effect on the accuracy and service life of the Linear Guides.
  • Blocks and rails manufactured by MIUSMI guarantee their own radial clearance (preload) and accuracy as sets of blocks and rails. Be sure to use the blocks and rails in sets.

Types of Greases

The following types of greases are used in MISUMI linear guides.

GreaseLinear GuideGrease ModelFeatures
StandardMiniatureMultemp Grease PS2 (Manufactured by Kyodo Yushi)Grease with excellent low temperature and low torque properties.
Miniature with MX lubrication unitTufflix MP2 (Manufactured by JX Nippon Oil & Energy)Reduces temperature rise in the bearing area; extends bearing life and reduces grease replenishment interval and maintenance work.
Medium Load
Heavy Load
Albania Grease S2 (Manufactured by Showa Shell Sekiyu)It has excellent lubrication and shows excellent performance under normal and heavy load conditions.
Type LMiniature/Medium/Heavy LoadET-100K (Manufactured by Kyodo Yushi)It has excellent heat resistance, oxidation stability, adhesion and tackiness.
It is also a low dispersion, low leakage grease.
Type GLG2 (Manufactured by NSK Ltd.)It produces little dust and has excellent wear resistance and rust resistance properties.

Maintenance

The grease forms an oil film on the steel balls and on the slideways of the linear guide, reducing friction.

Loss and deterioration of the grease will greatly affect the service life of the linear guide, so it must be lubricated on time depending on the conditions of use.

MISUMI linear guides are lubricated with standard grease at the time of shipment, so they can be used as is.

Recommended lubrication intervals

Lubricate every 6 months. If linear guide is used for long distances, it is recommended to lubricate every 3 months, or if it is used more than 1000 km in a period, we recommend every 1000 km.

*The above is the distance-based lubrication interval. If the grease deteriorates or is heavily contaminated due to the operating environment, it may be necessary to shorten the lubrication interval.

By using a lubrication unit, it is possible to extend the lubrication interval considerably.

MX Lubrication Units

Features

Long-term Maintenance-Free Condition

The special polyurethane in MX Lubrication Unit impregnates grease, and its micropore structure provides an optimal amount of grease on the raceway surface. A constant oil film is formed between steel balls and the raceway, enabling long-term maintenance-free operation.

Cost Benefit

Extended lubrication intervals result in reduce maintenance cost.

Short Lead Time

Ship time is the same as that of standard products.

Structure

Special polyurethane (yellow color) has interconnected micropores and has excellent water-holding capacity. This allows the unit to hold more grease.

Test Results

The linear guides with MX lubrication unit achieved 2,000 km of travel, more than the standard units without grease

Test conditions

SampleSXR24
Load2.87 kN
Travel speed750 mm/sec

- No grease: degreased linear guide

- No grease + MX: degreased linear guide equipped with MX only MX is filled with Alvania Grease S2 by Showa Shell Sekiyu K.K.

[!] Test results are for reference only and are not guaranteed

Permissible loads

HBasic Load RatingAllowable Static MomentMass
C (Dynamic)
kN
Co (Static)
kN
MA,MB
N・m
MC
N・m
Block kgGuide Rails
kg/m
Double-SealedMetal Scrapers
StandardWideStandardWide
248.614.269980.210.260.210.261.5
2812.521.31552320.320.370.320.372.4
3320.234.52753930.480.630.490.643.4

kgf = N ・ 0.101972

kgf = kilograms force, N = Newton

Double-Sealed

- Double gasket design with two layers of side gaskets increases the sealing efficiency and prevents ingress of foreign materials into the block.

- Can be used where dust and machining chips exist.

[!]Sliding resistance of Double-Sealed Type is higher than that of Standard Type.

With Metal Scrapers

- Larger debris adhering to the rail can be removed by attaching metal scrapers to the outside of the side seals.

- Can be used in areas with high temperature dusts such as welding spatter.

Support Information

Shelf Life Information

For more information about the calculation of useful life, click here.

Mounting Hole Information

For more information about mounting holes and G-value, click here.

Installation Information

For more information about the installation click here.

Cautions

If the linear guides are handled incorrectly, the quality may deteriorate. When using MISUMI linear guides, consider the following points:

Be careful when removing the blocks

MISUMI linear guidesare equipped with a retainer, so that the balls will not fall out even if the block is removed from the rail. However, if the block is removed from the rail at high speed or inserted at an angle, the balls may fall out. Be careful when removing and installing the blocks.

Blocks and rails not sold separately

Linear guides MISUMI are only sold as a block and rail assembly. For resin retainer type only, blocks and rails can be purchased separately.

Please do not replace with another product

The radial clearance and accuracy of MISUMI linear guides are guaranteed as a block and rail assembly, so the accuracy is not guaranteed when combined with another product.

Please check the reference surface before installation.

Linear guides have reference planes on both the rail and the block (the side with a straight groove is provided). When installing the linear guide, correctly align this reference surface with the mounting reference surface of the table and base and secure it. For more details, refer to"Installation" in "Support Information".

Please do not add rails

MISUMI linear guides are shipped with chamfered edges on the end of the rail. The use of additional rails is not covered under warranty.

Secure all rail mounting holes.

The rail curvature is corrected with all mounting holes clamped. Accuracy is guaranteed under these conditions.

Part Number 

CAD Data download and 3D preview are not available because the part number has not yet been determined.

  • *In order to open the CAD Data download and 3D preview screen, the part number must be fixed.
  • Please confirm the part number from "Specification / Dimension"on the left side, and then perform the CAD Data Download / 3D Preview operation.
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Part Number
SX2WD28G
Part NumberMinimum order quantityVolume DiscountDays to Ship RoHSBlock Type Rail Width W1
(mm)
Unit Height H
(mm)
No. of Blocks Rail Length L
(mm)
Nominal Part Number Basic Load Rating: Dynamic Load
(N)
Basic Load Rating: Static Load
(N)
Allowable Static Moment MA
(N⋅m)
Allowable Static Moment MB
(N⋅m)
Allowable Static Moment MC
(N⋅m)
Lubrication Type L Dimension Type Seal Type
1 Piece(s)

12 Days or more

10[Wide] Wide Block20282-201250021300155155232Special Grease (Clean Room) - G TypeStandard TypeDouble-Sealed

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  1. 1
 

Basic Information

Set / Single Item Set Rail Type Standard Material Carbon Steel
Preload Normal Clearance (No Preload) Accuracy Standard Grade Ball Arrangement Medium, Heavy Load Type
Retainer N/A Rolling Element Ball

Frequently asked questions (FAQ)

質問: Are the block's ball bearings retained?
回答: Yes, all ball bearings are retained on Misumi linear guides.

Additional Products in this Category

Complementary Products

MISUMI Unit Example related to this product

Tech Support

Technical Support
Tel:+52-442-672-7661 ext. 2 then wait and dial 4
E-mail: soportetecnico@misumimex.com
Mon. - Fri. 8 a.m. - 6 p.m.