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3

4.0  DESCRIPTION

The NS Series nut splitter is a hydraulically operated industrial 
power tool, designed to quickly remove seized or heavily 
corroded nuts from threaded studs.

See Figure 1 for an overview of NS nut splitter major features 
and components.

A complete nut splitter consists of two separate subassemblies: 

1)

 a single or double acting hydraulic cylinder and 

2)

 a 

matching cutting head designed for use with a specifi ed  nut 
size range. The replaceable cutting blade is installed in a blade 
holder mounted on the shaft of the cylinder subassembly.
See Figure 2. 

One cutting head is provided with each nut splitter. If desired, 
additional cutting heads for different nut size ranges can be 
purchased separately from Enerpac.

Refer to sections 3.1 and 3.2 for nut splitter specifi cations and 
additional information.

Cylinder
Subassembly

Cutting Head
Subassembly

Figure 2, Nut Splitter Subassemblies

3.0  SPECIFICATIONS

3.1  Product Data

Nut Splitter

Model

Number

Capacity

tons [kN]

Dimensions

inch [mm]

Weight

lb [kg]

Minimum 
Pump Oil

Capacity

 in

[cm

3

]

Additional Model Numbers

A

B

C

D

E

F

G

Cylinder

 Sub-

Assembly

Cutting

 Head Sub-

Assembly

Replacement

Blade

NS-7080

NS-7080D

103.2

[918]

5.2

[132]

1.1

[28]

7.1

[180]

0.3

[8.0]

3.2

[81]

7.3

[186]

16.2

[412]

81.4

[37.0]

23.0

[377.0]

NSC-70

NSC-70D

NSH-7080

NSB-70

NS-7085

NS-7085D

103.2

[918]

5.7

[145]

1.2

[30]

7.1

[180]

0.3

[8.0]

3.2

[81]

7.7

[196]

16.6

[422]

82.7

[37.5]

23.0

[377.0]

NSC-70

NSC-70D

NSH-7085

NSB-70

NS-7095

NS-7095D

103.2

[918]

6.3

[160]

1.3

[32]

7.1

[180]

0.3

[8.0]

3.2

[81]

7.9

[201]

17

[432]

84.9

[38.5]

23.0

[377.0]

NSC-70

NSC-70D

NSH-7095

NSB-70

NS-70105

NS-70105D

103.2

[918]

6.9

[174]

1.4

[35]

7.1

[180]

0.4

[9.0]

3.2

[81]

8.2

[209]

17.5

[443]

87.1

[39.5]

23.0

[377.0]

NSC-70

NSC-70D

NSH-70105

NSB-70

NS-110115

NS-110115D

192.5

[1712]

7.4

[189]

1.4

[36]

9.2

[234]

0.1

[3.7]

4.4

[111]

9.2

[234]

18.6

[472]

151.6
[68.8]

50.0

[819.5]

NSC-110

NSC-110D

NSH-110115

NSB-110

NS-110130

NS-110130D

192.5

[1712]

8.6

[219]

1.6

[41]

9.2

[234]

0.1

[2.5]

4.4

[111]

9.5

[242]

19.4

[493]

158.3
[71.5]

50.0

[819.5]

NSC-110

NSC-110D

NSH-110130

NSB-110

  

Note

: A model number ending with “D” indicates double acting.

3.2  Nut and Bolt Ranges

A

B

Cutting Head 

Subassembly 

Model Number

Bolt Range

inch [mm]

Hexagon

Nut Range

inch [mm]

NSH-7080

1.75-2.00

[M45-M52]

2.75-3.13

[70-80]

NSH-7085

1.75-2.25

[M45-M56]

2.75-3.50

[70-85]

NSH-7095

1.75-2.50

[M45-M64]

2.75-3.88

[70-95]

NSH-70105

1.75-2.75

[M45-M72]

2.75-4.25

[70-105]

NSH-110115

2.75-3.00

[M76-M80]

4.25-4.63
[110-115]

NSH-110130

2.75-3.50

[M76-M90]

4.25-5.38
[110-130]

Double Acting Only

Notes:

• The NS Series is available in both single and double acting 
models. Single acting models use spring force to retract the 
blade. Double acting models use hydraulic force to retract the 
blade.

• A model number ending with “D” indicates that the nut 
splitter (or cylinder sub-assembly) is double acting. Refer to 
Section 3.1 for model numbers and additional information.

• Both single and double acting models use the same NSH 
series cutting heads shown in Section 3.1.

Summary of Contents for NS Series

Page 1: ...he nut splitter to a pump with a higher pressure rating Never set the relief valve to a higher pressure than the maximum rated pressure of the pump Higher settings may result in equipment damage and or personal injury WARNING The system operating pressure must not exceed the pressure rating of the lowest rated component in the system Install pressure gauges in the system to monitor operating press...

Page 2: ...inder to fully retract before disconnecting hydraulic hose s High pressure fluid may be ejected from an unretracted cylinder if a coupler has been damaged during handling Fully release hydraulic pressure and disconnect hydraulic hose s from nut splitter cylinder before applying lubricant to blade or performing any other work inside the cutting zone Be careful when handling severed nuts Sharp edges...

Page 3: ...7 7 196 16 6 422 82 7 37 5 23 0 377 0 NSC 70 NSC 70D NSH 7085 NSB 70 NS 7095 NS 7095D 103 2 918 6 3 160 1 3 32 7 1 180 0 3 8 0 3 2 81 7 9 201 17 432 84 9 38 5 23 0 377 0 NSC 70 NSC 70D NSH 7095 NSB 70 NS 70105 NS 70105D 103 2 918 6 9 174 1 4 35 7 1 180 0 4 9 0 3 2 81 8 2 209 17 5 443 87 1 39 5 23 0 377 0 NSC 70 NSC 70D NSH 70105 NSB 70 NS 110115 NS 110115D 192 5 1712 7 4 189 1 4 36 9 2 234 0 1 3 7...

Page 4: ...psi 700 bar operation See Figure 4 for typical pump and hose arrangements Single acting nut splitters are equipped with one Enerpac CR 400 3 8 female coupler Double acting nut splitters are equipped with two Enerpac CR 400 3 8 female couplers Figure 4 Hydraulic Connections typical pumps shown Connect the hydraulic hose s between the pump and the nut splitter cylinder Check that couplers on both en...

Page 5: ... damage to the bolt threads Refer to sections 6 1 and 6 2 for adjustment instructions 4 Connect hydraulic hose s as described in Section 5 3 Check that hydraulic pump reservoir is filled to the correct level 5 To help prolong blade life lubricate the blade cutting edge and flanks with a molybdenum disulphide based lubricant or other high quality lubricant CAUTION Wear gloves when applying lubrican...

Page 6: ...positioned back in the same nut groove 4 If step 3 did not work Re lubricate the blade and the nut groove again Lift and position the nut splitter above the flange surface so that the blade will penetrate the nut approximately the height of the nut and in the same groove Then re apply pressure 5 If step 4 did not work Install a larger cutting head if available or use a larger nut splitter model Be...

Page 7: ...lds pressure but piston and blade do not move or move only a partial amount Pump reservoir not vented If using a vented pump loosen vent fill cap or vent screw as required to provide venting Coupler not fully assembled Check couplers Both hoses not connected double acting models only Be sure that both hoses are connected Piston at full stroke Allow piston to retract Blocked hose Replace hose 3 Nut...

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