We invented the Petrol Driven Impact Wrench in the 1970’s and since then have continually improved its quality and reliability to ensure our Master 35 Impact Wrench remains the best of its kind in the World. The Master Wrench was specifically designed for use in a railway environment. It will remove/fit most Chairscrews and Fishplate Nuts in under three seconds and with our Safety Quick Release Auger Attachment can be easily converted into a Wooden Sleeper Drilling Machine. The Master 35® will loosen any screwed fastener tightened by any other Petrol Impact Wrench.
Master 35® Impact Wrench
Energy Source: Petrol
Square Drive: 1"
Torque max: 2,500Nm
Technical Data
| ORDER NO. | Master 35 Impact Wrench | ||||
| Energy source | Petrol | ||||
| Engine | Two stroke/cycle Special Airtec EMAK 63.4 c.c. complying with EUR5 and EPA3 Standards | ||||
| Power | 3.4 HP 2.6kW @ 7800rpm | ||||
| Dimensions | 600mm (L) x 284mm (H) x 452mm (W) | ||||
| Weight | 17.9Kgs | ||||
| Fastener Type | Bolt: 16-32mm diameter Rectangular: all sizes Hexagon: up to 83mm |
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| Square Drive | Standard 1″ | ||||
| Torque Range | 500 – 2,500Nm (approx.) | ||||
| Noise level LpA | 101,7 dB(A) | ||||
| Noise level LWA | 114.8 dB(A) | ||||
| Vibration level | <2.5 m/s² | ||||
| Fields of application / branch | Railway Track | ||||
| The following data is based on practical on track testing carried out in the UK in February 2020 | |||||
| Fishplates / Joint Bar Nuts – 2.24 seconds | |||||
| AV | LV | ||||
| Vibration | Trigger Time (mins) | No. of Fasteners | Trigger Time (mins) | No. of Fasteners | |
| Tightening | 12.28m/s2 | 20 | 533 | 80 | 2133 |
| Loosening | 11.05m/s2 | 25 | 667 | 98 | 2613 |
| Chairscrews / Lagscrews – 2.5 seconds | |||||
| AV | LV | ||||
| Vibration | Trigger Time (mins) | No. of Fasteners | Trigger Time (mins) | No. of Fasteners | |
| Tightening | 11.90m/s2 | 21 | 504 | 85 | 2040 |
| Loosening | 14.72m/s2 | 14 | 336 | 55 | 1320 |
Old Master 35 Technical Data
| Bolt Capacity | 16 to 32mm (5/8″ to 1 1/4″) |
| Torque Range | 500 – 1800 Nm (350 to 1325 Ft/lbs) using five position dial settings. |
| Dimensions | Length: 570mm (22 3/8″) Height: 280mm (10 5/8″) Width: 445mm (17 ½”) |
| Engine | Two stroke/cycle Special Airtec EMAK 056 56 c.c. Maximum free speed 12,000 R.P.M. Fuel Tank Capacity 0.7 litres (1.20 pints) Running time on full tank of fuel 60 Minutes. |
| Ignition | Electronic Selectra. Spark Plug Champion RCJ-7Y or equivalent. Spark Plug gap should be 0.5 to 0.6mm. |
| Gearbox | Fill with 0.25 Litres of Esso Spartan EP68, Mobil Gerar 626, Carter EP68, Merpoa 68, Valvoline 80-90W or an equivalent non synthetic 68 viscosity Gear Oil to half way up sight glass with Wrench in the horizontal position. Change oil every 12 months. |
| Impact Mechanism | Fill with 130 grammes of Molybdenum Disulphate Grease, Castrol MS3, Klubern N12MF, Valvoline NLG1 #2 or equivalent Grade 2 quality. |
| Noise | Acoustic pressure (Lpa) readings: Idling: 87 dB(A) Power (LWA) according to ISO 3746 Idling: 96 dB(A) Under very extreme working conditions the machine can reach 103 & 112 dB(A) respectively. |
| Square Drive | Standard 1“ |
| Vibration Guide | On extensive on-track trials carried out under the independent supervision of Loughborough University in February 2008 the undernoted results were achieved on loosening and tightening railway fasteners: Fishplate/Joint Bar Bolts 11.2 to 11.6m/s2 in approximately three seconds. 430 bolts before reaching EU Action Level and 1800 to reach Limit Level.Chairscrews/Lagscrews 9.8 to 11.0m/s2 in approximately seven seconds. 240 screws before reaching EU Action Level and 1000 to reach Limit Level.The actual figures achieved can vary depending on operator technique and condition of Wrench, Fastener and Track. |
| Weight | 18.3 Kgs (40 1/3 lbs) |