Hydraulic tools - standard articles and custom-made products

Hydraulic tools from CARL WALTER cover high torque ranges (up to 100,000 Nm) and have a very high accuracy, which is up to + / - 3%. Due to high torques, use only with power inserts! Of course we supply special force inserts according to customer specifications (e.g. force specification or space specification). Based on our many years of experience, we offer our hydraulic tools as standard articles or as custom-made products according to special requirements.

Catalog hydraulic tools

Prdoduct advantages and product features

All hydraulic tools have been specially developed for confined spaces and are therefore characterized by small head radiuses and an extremely compact construction. Using the most modern methods (CAD/FEM), the optimum ratio of weight and torque was designed and calculated. CARL WALTER hydraulic tools are therefore designed to be extremely light and user-friendly.

The comprehensive accessory program of our hydraulic tools ranges from exchangeable cassettes (square drive cassettes, ring cassettes) to sockets with direct toothing and special support arms.

Product types

CARL WALTER hydraulic tools include, among others, the tools of the proprietary brand BOLTMAX, which includes the following product types:
  • BOLTMAX compact - compact hydraulic wrench with changeable cassettes
  • BOLTMAX classic - hydraulic wrench with fix square drive in approved quality
  • BOLTMAX xt - mounting system for heat exchangers
  • BOLTMAX tension - hydraulic bolt tensioners
  • BOLTMAX custom - specially designed parts

Hydraulic tools - development and special design according to customer requirements

As a manufacturer of hydraulic tools, we have a high level of vertical integration in addition to our know-how. The development of hydraulic tools specially adapted to individual customer requirements is therefore one of our core competencies. All individual hydraulic tools are developed and designed by our design department in close coordination with the customer.

An excerpt from our hydraulic tools range

The complete product range as well as detailed item descriptions can be found in our catalog.

Special hydraulic tools

Special inserts and special reaction ananchor

Individually defined dimensions and width

Batch size 1 to series production

Factory certification (EN 10204)

BOLTMAX compact - The hydraulic torque wrench

The RSLSDS tool set from the BOLTMAX family consists of: the BOLTMAX compact RS basic tool, the BOLTMAX compact S square cassette and the BOLTMAX compact RSLA support (supplied without swivel coupling).

BOLTMAX compact - hydraulic torque wrench

Our hydraulic tools of the BOLTMAX compact series are particularly characterized by their compact design and the small head radiuses, which enables universal use. In addition, they consist of few individual parts, which means that only little maintenance is required. Thanks to the flexible support, the BOLTMAX compact series can also be used individually. Corresponding inserts with direct serration as well as ring spanner cassettes can be found in our range.
Ident.-No. Nm max P max (bar) Output Length B H RK Weight (g)
374000 1909 700 20 (3/4") 160 114 65 23,9 3000
74020 4176 700 25 (1") 196 142 80 31,8 4900
77430 7190 700 40 (1 1/2") 235 164 100 38,6 8000
74040 10660 700 40 (1 1/2") 279 169 115 38,6 9900
74060 15123 700 40 (1 1/2") 286 202 125 47,8 13300
74065 25547 700 63 (2 1/2") 336 241 160 63,5 22100
74080 37966 700 63 (2 1/2") 385 263 165 63,5 26400
Sockets for BOLTMAX compact
Sockets with direct toothing for
BOLTMAX compact RSLSDS

These  sockets  are  directly  inserted  into  the  
toothing of hydraulic tools (instead of the square
drive).
 • smaller dimensions
• reduction of bending load
Hexagon heads for BOLTMAX compact
Hexagon heads to be used with BOLTMAX compact
Basic tool for BOLTMAX compact
Basic tool with HD-connectors
Reaction bars for BOLTMAX compact
Reaction bars
360º rotatable, light weight
Square cassettes for BOLTMAX compact
Square cassettes

BOLTMAX classic - hydraulic wrench

The origin of the entire Boltmax system convinces with reliability and precision for over 20 years, bolting in a wide torque range (300 - 100,000 Nm) and a modular design.  

BOLTMAX classic - hydraulic wrench

Modular built-up hydraulic tightening tool
 • specially toothed ratchet
 • changeable square drive
 • incl. torque angle measuring scale
Ident.-No. Nm max P max (bar) Output Length B H RK Weight (g)
76908 3000 700 25 (1") 289 156 88 37 6900
77137 5000 700 40 (11/2") 191 158 99 39 7000
77157 6500 700 40 (11/2") 291 158 99 39 7200
78037 10000 700 40 (11/2") 342 203 108 57 12900
78039 12500 700 40 (11/2") 347 208 108 57 13200
78937 20000 700 63 (21/2") 382 238 150 63 22900
78957 25000 700 63 (21/2") 402 243 150 68 24500
78997 32000 700 63 (21/2") 402 243 152 68 26000
79538 50000 700 90 (3 1/2") 546 303 212 85 60000
79650 100.000 700 90 (3 1/2") 715 380 237 120 120000

Hydraulic pump and accessories

Electro hydraulic pump HE/FE

Electro hydraulic pump / Pumps for hydraulic tightening tools
 •  three step axial reciprocating pump
 • electro motor
 • 2800 min-1
 • adjustable pressure relief valve
 • manometer diam. Ø 100 mm
 •  incl. couplings, oil filling and remote control (5m)
Order-No. Ident.-No. Volume Tank (L) L B H V
Weight (g)
HE025 77903 1) 75 bar: 3,2l
2) 200 bar: 0,9l
3)700 bar: 0,4l
2,5 360 230 400 230 15000
FE055 77910 1) 75 bar: 6,5l
2)200 bar: 1,8l
3)700 bar: 0,7l
4,0 400 280 400 230 25000
FE110 77939 1) 75 bar: 8,5l
2)200 bar: 3,4l
3)700 bar: 1,3l
4,0 460 300 440 400 30000
Manual hydraulic pump BMPH
 • two step manual pump
 • manometer diam. 100 mm
 • incl. couplings and oil filling
Air hydraulic pump BMPL
 •  two step axial reciprocating pump
 • air motor, 1,1 kW (working pressure 5 - 10 bar - 16 l/sec)
 • 3000 min-1
 • adjustable pressure relief valve
 • manometer diam. 100 mm
 • incl. service unit, couplings, oil filling and remote control (5m)
HD-hydraulic hose
 • oil filled and free from air
 • incl. HD couplings
 • with bending protector

Assembly and torque tool for plate Heat exchanger BOLTMAX xt

Our assembly and disassembly system for plate heat exchangers BOLTMAX xt achieves a high working speed (approx. 10 min to disassemble a cooler with M39 spindles). This hydraulic tool requires only one operator and thus allows a very efficient operation.

Assembly and torque tool for plate Heat exchanger BOLTMAX xt

Precise force control (pressure gauge/pressure relief valve) ensures high precision and various interchangeable components provide great flexibility. Due to the high safety standards, safe working in hazardous areas (with air hydraulic pump) is possible. In addition, safe working is supported by not squeezing out the threaded rods. The assembly and disassembly system is also characterized by its compact design and low-maintenance operation (no highly loaded gears). A thrust bearing is not required.

The basic BMXTBS system consists of the following five components as standard:
- Cylinder
- Housing
- 5 m hose
- Nut Support
- Ratchet
- The system is supplemented by a bushing, a split nut and a hex adapter.
Order-No. Ident.-No. F
BMXTBS 77429 300KN

BOLTMAX tension - hydraulic bolt tensioners

The BOLTMAX tension is suitable for controlled pretensioning of bolts with hydraulic assistance.

Hydraulic bolt tensioner - BOLTMAX tension

Our hydraulic tools of the BOLTMAX tension series are particularly convincing due to their high accuracy, which is especially important when hydraulically tensioning bolted connections. In addition, the BOLTMAX tension enables fast application, which increases work productivity. Due to its easy handling, the BOLTMAX tension can be used in a wide variety of work areas, such as flange bolting. The thread projection must be at least equal to the bolt diameter (nut height = bolt diameter).

• high accuracy
• simple usage
• safe working
• interchangeable pullers
• interchangeable nuts
• interchangeable bridges
Ident.-No. Thread Fp (kN) AØ (mm) B (mm) D (mm) Weight (g)
75000 M16 136 73,5 23,5 160 1450
75002 M18 136 73,5 23,5 160 1450
75004 M20 136 73,5 26,5 160 1450
75006 M22 136 73,5 26,5 160 2310
75008 M24 228 86,0 29,5 180 1450
75010 M27 228 86,0 32,0 185 2340
75012 M30 348 107,0 36,0 197 3460
75014 M33 348 107,0 36,0 197 3460
75016 M33 428 117,0 36,0 199 3930
75018 M36 428 117,0 39,0 202 3890
75020 M36 348 107,0 39,0 200 3420
75022 M39 428 117,0 42,0 213 4400
75024 M39 591 136,0 42,0 212 5360
75026 M42 591 136,0 45,0 214 5700
75028 M42 788 150,0 45,0 216 6900
75030 M45 591 136,0 49,0 217 5800
75032 M45 788 150,0 49,0 219 7000
75034 M48 788 150,0 51,0 222 7200
75036 M48 989 169,0 51,0 222 8050
75038 M52 788 150,0 54,0 225 7500
75040 M52 989 169,0 54,0 225 8350
75042 M56 989 169,0 59,0 231 9120
75044 M56 1274 190,0 59,0 241 10670
75046 M60 1274 190,0 65,0 248 11270
75048 M64 1274 190,0 65,0 248 11270
75050 M64 1594 208,0 65,0 252 12670
75052 M68 1594 208,0 71,0 258 14150
75054 M72 1594 208,0 71,0 258 14150
75056 M72 1832 222,0 71,0 258 15550
75058 M76 1832 222,0 77,0 265 17800
75060 M76 2178 239,0 77,0 267 20800
75062 M80 2178 239,0 77,0 274 20800
75064 M85 2178 239,0 87,0 274 22600
75066 M90 2178 239,0 93,0 281 22100
75068 M95 2615 276,0 99,0 296 50000
75070 M100 2615 276,0 100,0 302 54000

Hydraulic nuts - BOLTMAX tension HN

The hydraulic nuts of the BOLTMAX tension HN series are particularly suitable for bolted connections requiring high forces (e.g. bearing blocks). In addition, hydraulic nuts are often used to pretension bolts that are difficult to access.

Hydraulic nuts - BOLTMAX tension HN

High accuracy of the product ensures the correct preload force and uniform load. The ease of use of the BOLTMAX tension HN hydraulic nuts also ensures fast assembly and disassembly times.

 • quick, accurate and reliable
 • easy re-adjustment of tension
 • simply use
 • load is retained by threaded collar
 • side entry is available (option)
Ident.-No. Thread
Fp (kN) AØ (mm) C (mm) Hub max (mm) Weight (g)
77400 M16 217 74 66 4 2080
77401 M18 217 74 66 4 2080
77402 M20 217 74 66 4 2080
77403 M22 217 74 66 4 2080
77404 M24 217 74 66 4 2080
77405 M27 217 74 66 4 2080
77406 M30 217 74 66 4 2080
77407 M30 350 95 66 4 3250
77408 M33 350 95 66 4 3250
77409 M36 350 95 66 4 3250
77410 M39 350 95 66 4 3250
77411 M42 440 108 74 4 4420
77412 M45 440 108 74 4 4420
77413 M48 440 108 74 4 4420
77414 M52 440 108 74 4 4420
77415 M56 552 118 78 4 5130
77416 M60 617 128 84 5 6390
77417 M64 617 128 84 5 6390
77418 M68 777 140 88 6 7980
77419 M72 1039 162 92 6 11580
77420 M76 1039 162 92 6 11580
77421 M80 1039 162 92 6 11580
77422 M80 1462 185 112 8 18910
77423 M90 1462 185 112 8 18910
77424 M90 1625 202 122 8 23850
77425 M100 1625 202 122 8 23850
77425 M100 2080 218 137 10 31400