Double-sided milling rings (Weld Root Opener) are available in diameters of 70, 116 and 125 mm and are used for opening butt- and fillet welds. Suitable materials are all non-ferrous metals, carbon/fiberglass, plastics and wood.

Each material requires a unique tooth profile. You may use an aluminum milling ring for other materials as well, but with limited performance.

Our standard product range is designed for aluminum and if you need milling rings for other materials please contact us.

Base support

The base support Universal has a bore diameter of 22.23 mm (7/8") and fits to all electrical and pneumatical grinders with or without mounting flange depending on the type. It is supplied with a countersunk screw to fit on pneumatic turbo-grinders.

With a base support M 14 the milling rings may be mounted to many angle grinder with a M 14 thread not requiring an additional mounting flange.

Reference table weld root openers

Item number Designation Weight
25,001,0,070 Double-sided milling disc (weld root opener) 70 mm - Z36/25°-Alu 0,4 kg
25,001,0,116 Double-sided milling disc (weld root opener) 116 mm - Z55/30-Alu 0,7 kg
25,001,0,125 Double-sided milling disc (weld root opener) 125 mm - Z59/30-Alu 0,9 kg
29,025,0,070 Base support milling disc 70 mm/M 14 0,05 kg
29,025,1,116 Base support milling disc 116-125 mm/Universal 0,1 kg
29,025,0,116 Base support milling disc 116-125 mm/M 14 0,1 kg
29,000,0,002 Retainer nut 116-125 mm 0,05 kg
29,000,0,004 Retainer nut 70 mm, M14 0,02 kg
29,000,0,003 Countersunk bolt M8x35 verzinkt GTG 0,01 kg
29,000,0,001 Reusable transport box 0,05 kg

Milling ring sets

Our sets contain a double sided milling ring with the relevant diameter, the base support (M 14 or Universal), the retainer nut and the reusable transport box.

Sets of weld root openers

Item number Designation Base support
25,002,0,070 Set double sided milling ring 70 mm - Z36/25°-Alu/M14 M 14
25,002,0,116 Set double sided milling ring 116 mm - Z55/30°-Alu/M14 M 14
25,002,0,125 Set double sided milling ring 125 mm - Z59/30°-Alu/M14 M 14
25,003,0,116 Set double sided milling ring 116 mm - Z55/30°-Alu/Universal Universal (22,23 mm)
25,003,0,125 Set double sided milling ring 125 mm - Z59/30°-Alu/Universal Universal (22,23 mm)

Resharpening

Our weld root openers may be resharpened 5-7 times.

Item number Designation
26,001,0,116 Resharpening double-sided milling ring 116 mm Z55/Alu
26,001,0,125 Resharpening double-sided milling ring 125 mm Z59/Alu
26,001,0,070 Resharpening double-sided milling ring 70 mm Z36/Alu

Our stock

DesignationItem numberWeight [kg]Qty in stock
Double-sided milling disc 70 mm - Z36/25°-Alu 25,001,0,0700.43
Double-sided milling disc 116 mm - Z55/30-Alu 25,001,0,1160.73
Double-sided milling disc 125 mm - Z59/30-Alu 25,001,0,1250.91