Secure-grip mechanical flange spreader SG4TM

The SG4TM secure grip bolt-hole spreader can be used on all flange types with bolt-hole sizes ranging from 17.5mm (0.69”) to 23.5mm (0.91”) Additional short collet holders are supplied within the tool kit allowing the tool to spread flanges apart and remove a spacer, wafer or butterfly valve. This low-end, mechanical model offers up to 3.7T (37kN) of spreading force.


Main advantages:
● Due to the unique technology of expanding pins, the Zero-Gap is guaranteed to be the safest accelerator in the world;
● Universal accelerator, applicable to ANSI, API, DIN, SPO, ASME & BS flanges;
● Full control during operation;
● Unique expanding pin;
● Minimum or missing clearance is required;
● Secure locking mechanism in the bolt hole
1 x SG4TM Mechanical Flange Spreader
1 x 150mm (5.9") Vernier Calliper
1 x 3/8" Drive Torque Wrench and Socket
1 x Safety Block
1 x Pair of M16 (⅝") Collets
1 x Pair of M20 (¾") Collets
1 x Instruction Manual

Secure-grip mechanical flange spreader SG4TM 

Spreading force

3,7T (37 kN)

Spreading distance

of 75,0 mm

Tool weight

4,5 kg


The mechanical spinner SG6TM is suitable for bolt holes from 24 mm (0.94 '') to 30 mm (1.18 '')
The mechanical spinner SG11TM is suitable for bolt holes from 30 mm (1.18 '') to 39 mm (1.54 '').