URESTORO [Overview]
Weather-Resistant Urethane Spring
Pressure Source Components■ Application Examples [Type X&A]
The URESTORO urethane elastomer spring for press
tools is a weather resistant material suitable for mostconditions. Ideal for repetitious compression applications,with resistance to high temperature and humidityconditions. Moreover, the product withstands not only
high impact loads, but also resistant to certain chemicals.
Excellent for pad pressure resistance of press tools.

For operation with single stage spring
hd8
hd4

Guide Pin

Shoulder Bolt
hd10

hd3

hd1

■ Features・The durability in extreme environments with high stress levels or humidity has beensignificantly increased compared to that of the existing USX, USA and USZL specifications.
・The URESTORO series can be easily substituted for existing products.
・The product dimensions have not altered and remain the same as that of the existing USX
specifications.
・However, please note that the load deflection curve for that of non-URESTORO products canbe different.
Material Characteristics

Performance Values

Material

Urethane ElastomerHardness

Shore Ａ 88°± 3°
GreenTensile Strength28.3 MPa100％

6.9 MPa300％11.7 MPa

Retainer

hd2

RFor operation with double stage spring
DETAIL R

Washerhd6

hd7

Elongation

450%

Tear Strength

11.4 N/mm

Impact Resistance

50%

hd5

hd9

■Range of Application
USWA

Deflection Rate
Limit for Operation
25%

SPM
Limit for Operation
50SPM

USWX

30%

40SPM

Ambient Temperature
Limit for Operation

Dimension Table (mm) [Type X]
Urethane Spring

50℃

Guide Pin

WasherOthers

H d1

Hd 2

Hd 3

Hd4

Hd 5

Hd 6

Hd7

Hd 8

Hd 9

Hd10

Specification limit SPM varies depending on the deflection ratio. Please contact our sales representatives for details.

USWX50501458

12M106513147870■ Oil and Chemical Resistance

USWX60602070

18M168013209080

USWX8080

2092

18M16100

2120112100

USWX100

10020114

18M16125

2120134120

Lubrication oilTurbine oilGasoline
AcetoneAmmonia112×2Ethyl alcohol
GreaseMineral oil
Acetic acid
Brine

3
11×
1WaterMethyl alcohol
Hydrochloric acid (20％)
Sulfuric acid (10％ )Benzene

2×3××

1 excellent resistance
2 good resistance3 mediocre resistance× not resistant

For the use with press tools, 1 or 2 can be considered.

■Storage・In order to protect against ultraviolet rays, store away from direct sunlight.
・Deterioration is faster under conditions of high temperature or humidity.
We recommend putting a desiccant in the container and storing in as cool a location as possible.

1171

Pressure Source
Components

Color

Modulus

Stepped Bushing

URESTORO is a registered trademark or unregistered trademark of Sankyo Oilless Industry, INC.

Copyright © Sankyo Oilless Industry, Inc. All Rights Reserved.

For USWA, use guide pin h12 for urethane diameter h60 or smaller and h18 for urethane diameter h70 or larger.

■ Conditions for Use
・Use at or below the stated deflection ratio.
・The urethane spring seating surface requires an external diameter of > 20 mm.
・The clearance around each spring must be sufficient to prevent any contact with theneighboring components.
・Exposure to ultraviolet and sunlight must be avoided.
・Guide pins should be S25C equivalent or better and finished within Ra1.6.

Copyright © Sankyo Oilless Industry, Inc. All Rights Reserved.

1172

URESTORO

Weather-Resistant Urethane Spring X Type
Pressure Source ComponentsUSWXhD

Catalog No.

hdD

Load F [kN]

S50
hV

60
USWX
USWXT

L

80
100hD+20hV+20

S=Lx30%L(actual size)

60 ( 62)80 ( 82)
60 ( 62)80 ( 82)
80 ( 82)
100 (103)
80 ( 82)
100 (103)
120 (123)

Catalog No.

DL

USWX
USWXT

50
80

60
80

SF [kN]

18.6

9.2

57

24.6

9.2

58

18.6

14.2

24.6

13.3

24.6

27.6

30.9

27.7

24.6

58.4

30.9

55.4

36.9

43.4

Vd147092

20114

Refer to page 1192 for the spacer for stack use of springs.

USWXT (with Retainer)

Pressure SourceComponents

For guide pin, use h12 for urethane diameter h50 or smaller and h18 for urethane diameter h60 or larger.

SORTA (Retainer)〈Material〉Urethane Elastomer

1181

Refer to page 1191 for attached retainer size.

Copyright © Sankyo Oilless Industry, Inc. All Rights Reserved.

1182

Copyright © Sankyo Oilless Industry, Inc. All Rights Reserved.

URESTOROUSWX Load-Deflection Diagrams
Pressure Source Components
Initial

6050509940406306

USWX100-100

Load (kN)

60

Load (kN)

USWX100-80

12Load (kN)

USWX50-80

12Load (kN)

USWX50-60

300,000 Strokes

303020201010336912151804

Deflection (mm)81216200244

USWX60-60

USWX60-80

16161212812162024051015202530

Deflection (mm)Deflection (mm)Deflection (mm)

USWX100-12060
50830204410036912151804

Deflection (mm)3025252020151055481216

Deflection (mm)2024201025

240612182430

36

Deflection (mm)151001183

Load (kN)

USWX80-10030

Load (kN)

USWX80-80

81216
Deflection (mm)Pressure Source
Components

8Load (kN)

Load (kN)

Load (kN)

4005152030

Deflection (mm)Copyright © Sankyo Oilless Industry, Inc. All Rights Reserved.

1184

Copyright © Sankyo Oilless Industry, Inc. All Rights Reserved.

hD
hd1＋0.5
0Retainer, Spacer
Pressure Source Components
SORTA

K

K (Retainer)

hd ＋ 0.1
0L2＋ 1.0

hd2

LCatalog No.

H＋ 0.5H− 00.5hD

hd115°
L1T

hD1

T

R2

L45°

hd − 00.3〈Material〉SS400 or S25C

Nominal

L141020SORTA

D16302022223524d913

Catalog No.

Nominal

LSORTA

2030

L1L22337510

Applicable Rubber Spring, Urethane Spring
Outer Diameter

Length30, 40〜4030n63

hd2〈Material〉SS400

Catalog No.

Nominal

D1K

101219.515221850n63dd2

HT

111251320660n125

60n60n120

Catalog No.

Nominal70n10060n200K

10SOIS
1C2-

310hD2hdhD

hD1

5hd0.

C

Pressure Source
Components

2-SORTB

10hD〈Material〉Neodel(#25-61N)

730〈Material〉SS400 or S25C

Catalog No.

NominalDD1D2dOuter Diameter

SORTB

1422191314950632720221380100When installing SORTB, set the straight part to the fixed surface side.

Catalog No.

Nominal

D65SOIS

50638010080100125d1321

Applicable Rubber Spring, Urethane Spring
Outer Diameter
304060637080

9010050

Inner Diameter

Guide Pin Diameter

141220110

2220

Guide pins should be S25C equivalent or better and finished within Ra1.6.

Catalog No.

NominalCatalog No.

NominalSORTB

14SOIS

631191

1192

Copyright © Sankyo Oilless Industry, Inc. All Rights Reserved.

Copyright © Sankyo Oilless Industry, Inc. All Rights Reserved.