Precise hydraulic tensioning for large bolted joints in industrial applications.
Atlas Copco CTST is a hydraulic bolt tensioner family for controlled, precise tightening tasks.
It fits industrial applications that need consistent clamping load on metric and imperial fasteners, with model selection based on the required size and ordering number.
How do I choose the right CTST model?
Step 1: Identify the bolt size used at the job site.
Step 2: Decide whether the joint uses Metric or Imperial threading.
Step 3: Match the required size with the correct CTST model and ordering number.
Does the series cover both metric and imperial fasteners?
Yes.
The family includes Metric and Imperial sizes, so you can match the tensioner to the required fastener type.
How do I know which model fits my bolt size?
Check the bolt diameter and pitch, then compare them with the compatible size listed for the CTST model you need.
Why use a hydraulic bolt tensioner instead of regular tightening?
When large bolts need consistent, controlled clamping load, a hydraulic bolt tensioner helps apply load in a structured way for industrial work.
What do I get when I choose a model from the series?
You get a specific CTST model with its own ordering number.
Final selection depends on the bolt size and application.
What kind of jobs is CTST best suited for?
The series is well suited for assembly and maintenance work where large fasteners require precise tensioning.
| Tool | Part No. Imperial | Thread Size (Inch) | (mm) | Part no. Metric | Bolt Load (Kn) | Stroke (mm) | Weight (kg) | A (mm) | B | C | D | E | F | G |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No 1 | 8434220070 | 3/4″-10UNC | M20x2.5 | 8434220071 | 227 | 10 | 2.0 | 73.50 | 21.0 | 67.00 | 71.0 | 45 | 62 | 49.5 |
| 8434220072 | 7/8″-9UNC | M22x2.5 | 8434220073 | 1.9 | 24.0 | 64.00 | 71.0 | 63 | 53 | |||||
| 8434220074 | 1″-8UN | M24x3 | 8434220075 | 1.9 | 24.0 | 69.00 | 78.0 | 69 | 58.5 | |||||
| 8434220076 | 1 1/8″-8UN | M27x3 | 8434220077 | 1.9 | 24.0 | 66.00 | 79.0 | 74 | 63.5 | |||||
| No 2 | 8434220079 | 1 1/8″-8UN | M27x3 | 8434220080 | 443 | 15 | 4.8 | 102 | 27.0 | 85.50 | 92.0 | 54 | 82 | 67.5 |
| M30x3.5 | 8434220082 | 4.9 | 32.0 | 85.00 | 93.0 | 85 | 69 | |||||||
| 8434220081 | 1 1/4″-8UN | M33x3.5 | 8434220083 | 4.6 | 31.0 | 84.00 | 95.0 | 85 | 72 | |||||
| 8434220084 | 1 3/8″-8UN | M36x4 | 8434220085 | 4.6 | 34.0 | 84.00 | 98.0 | 91 | 78 | |||||
| 8834220086 | 1 1/2″-8UN | M39x4 | 8434220087 | 4.7 | 36.5 | 82.00 | 100.0 | 90 | 80 | |||||
| No 3 | 8834220089 | 1 1/2″-8UN | M39x4 | 8434220094 | 810 | 15 | 9.5 | 133 | 36.5 | 98.00 | 109.0 | 56 | 97 | 83.5 |
| 8434220090 | 1 5/8″-8UN | M42x4.5 | 8434220095 | 9.0 | 37.5 | 93.00 | 107.0 | 110 | 92.5 | |||||
| 8434220091 | 1 3/4″-8UN | M45x4.5 | 8434220096 | 9.3 | 40.5 | 98.50 | 116.0 | 115 | 98 | |||||
| 8434220092 | 1 7/8″-8UN | M48x5 | 8434220097 | 9.0 | 42.5 | 95.00 | 116.0 | 116 | 101 | |||||
| 8434220093 | 2″-8UN | M52x5 | 8434220098 | 8.6 | 50.0 | 93.50 | 117.0 | 120 | 106 | |||||
| No 4 | 8434220100 | 1 7/8″-8UN | M48x5 | 8434220103 | 1273 | 15 | 16.1 | 163 | 43.5 | 106.00 | 118.0 | 57 | 130 | 108 |
| 8434220101 | 2″-8UN | M52x5 | 843422105 | 15.7 | 46.0 | 102.50 | 117.0 | 124 | 108 | |||||
| 8434220104 | 2 1/4″-8UN | M56x5.5 | 843422106 | 15.8 | 55.0 | 103.00 | 123.0 | 134 | 118.5 | |||||
| M60x5.5 | 843422107 | 18.3 | 54.0 | 121.50 | 145.5 | 150 | 127 | |||||||
| 8434220102 | 2 1/2″-8UN | M64x6 | 843422108 | 15.1 | 58.0 | 102.50 | 130.0 | 147 | 130.5 | |||||
| No 5 | 8434220110 | 2 1/2″-8UN | M64x6 | 8434220113 | 1829 | 15 | 22.7 | 193 | 64.0 | 107.50 | 133.0 | 60 | 147 | 130.5 |
| M68x6 | 8434220114 | 23.6 | 80.0 | 111.00 | 141.0 | 160 | 138 | |||||||
| 84342200111 | 2 3/4″-8UN | M72x6 | 8434220115 | 24.7 | 72.0 | 115.00 | 147.0 | 161 | 143 | |||||
| 8434220112 | 3″-8UN | M76x6 | 8434220116 | 22.2 | 77.0 | 108.00 | 146.0 | 170 | 153 | |||||
| No 6 | 8434220126 | 3″-8UN | M76x6 | 8434220130 | 2644 | 15 | 38.5 | 233 | 77.0 | 120.00 | 153.0 | 64 | 170 | 153 |
| M80X6 | 8434220131 | 38.3 | 78.0 | 117.00 | 154.0 | 178 | 155.5 | |||||||
| 8434220125 | 3 1/4″-8UN | M85X6 | 8434220132 | 38.1 | 78.0 | 114.00 | 154.0 | 182 | 165.5 | |||||
| 8434220127 | 3 1/2″-8UN | M90X6 | 8434220133 | 37.0 | 86.0 | 114.00 | 160.0 | 191 | 174.5 | |||||
| 8434220128 | 3 3/4″-8UN | M95X6 | 8434220134 | 37.0 | 99.0 | 116.00 | 168.0 | 210 | 189.5 | |||||
| 8434220129 | 4″-8UN | M100X6 | 8434220135 | 36.4 | 105.0 | 116.00 | 174.0 | 220 | 200 |
Technical diagram from the Atlas Copco catalog (p. 52)
| Tool No. | Load Cell Ordering No. | Metric description | Metric Ordering No. | Imperial description | Imperial Ordering No. |
|---|---|---|---|---|---|
| No.1 | 8434220069 | M20x2.5 | 4222260002 | 3/4″-10UNC | 4222260001 |
| 8434220069 | M22x2.5 | 4222260004 | 7/8″-9UNC | 4222260003 | |
| 8434220069 | M24x3 | 4222260006 | 1″-8UN | 4222260005 | |
| 8434220069 | M27x3 | 4222260008 | 1.1/8-8UN | 4222260007 | |
| No.2 | 8434220078 | M27x3 | 4222260010 | 1.1/8-8UN | 4222260012 |
| 8434220078 | M30x3.5 | 4222260011 | |||
| 8434220078 | M33x3.5 | 4222260013 | 1.1/4″-8UN | 4222260009 | |
| 8434220078 | M36x4 | 4222260015 | 1.3/8″-8UN | 4222260014 | |
| 8434220078 | M39x4 | 4222260017 | 1.1/2″-8UN | 4222260016 | |
| No.3 | 8434220088 | M39x4 | 4222260019 | 1.1/2″-8UN | 4222260018 |
| 8434220088 | M42x4.5 | 4222260021 | 1.5/8″-8UN | 4222260020 | |
| 8434220088 | M45x4.5 | 4222260023 | 1.3/4″-8UN | 4222260022 | |
| 8434220088 | M48x5 | 4222260025 | 1.7/8″-8UN | 4222260024 | |
| 8434220088 | M52x5 | 4222260027 | 2″-8UN | 4222260026 | |
| No.4 | 8434220099 | M48x5 | 4222260029 | 1.7/8″-8UN | 4222260028 |
| 8434220099 | M52x5 | 4222260031 | 2″-8UN | 4222260030 | |
| 8434220099 | M56x5.5 | 4222260033 | 2.1/4″-8UN | 4222260032 | |
| 8434220099 | M60x5.5 | 4222260034 | |||
| 8434220099 | M64x6 | 4222260036 | 2.1/2″-8UN | 4222260035 | |
| No.5 | 8434220109 | M64x6 | 8434220118 | 2.1/2″-8UN | 8434220117 |
| 8434220109 | M68x6 | 8434220119 | |||
| 8434220109 | M72x6 | 8434220121 | 2.3/4″-8UN | 8434220120 | |
| 8434220109 | M76x6 | 8434220123 | 3″-8UN | 8434220122 | |
| No.6 | 8434220124 | M76x6 | 4222260038 | 3″-8UN | 4222260037 |
| 8434220124 | M80X6 | 4222260039 | |||
| 8434220124 | M85X6 | 4222260041 | 3.1/4″-8UN | 4222260040 | |
| 8434220124 | M90X6 | 4222260043 | 3.1/2″-8UN | 4222260042 | |
| 8434220124 | M95X6 | 4222260045 | 3.3/4″-8UN | 4222260044 | |
| 8434220124 | M100X6 | 4222260047 | 4″-8UN | 4222260046 |
The HADI Technologies team will help you select the right configuration, verify application requirements and provide technical information about Atlas Copco CTST Hydraulic Bolt Tensioner.
The right solution starts with a clear brief
The HADI product development and engineering team can adapt a tool, product or system to your application.