ur own brand Variable Shade Electronic Welding Helmet. As you would expect from The Welders Warehouse, this welding helmets class leading quality and value is backed by a 2 year Warranty. The Speedshield V Auto Welding Helmet is ideal for Mig, Tig & Arc Welding down to 20amps.
FIVE PRODUCT TEST "BEST BUY" Accolades
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> Practical Classics Magazine
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No other Welding Helmet has ever won so many Accolades!!!
Speedshield V provides PREMIUM protection for YOUR eyes!
Be aware, there are some low cost welding helmets on the market deliberately similar to the Speedshield V. Speedshield V is the ONLY "Quadruple" product test winning welding helmet and is EXCLUSIVE to The Welders Warehouse.
Variable welding shade allows the user to adjust how dark the welding helmet filter is when welding, the external control knob even allows adjustment whilst welding!
Powered by both an internal lithium cell and solar panel. The lithium cell powers the welding helmet in low light areas, while the solar panel recharges the lithium cell during welding.
For maximum safety, the Welding helmet filter has a purple Ultra Violet filter coating. This coating protects the operator from dangerous UV even when the welding filter is in the light mode, thus eliminating the risk of arc eye while the welding helmet is down!
On the rear of the welding filter is adjustment for Sensitivity and Delay. Sensitivity adjustment allows the welding helmet to be fine tuned to ambient light conditions, while Delay adjusts how quickly the unit lightens after welding.Dip transfer - This is achieved at lower voltage settings. The wire is fed into the weld pool creating a "short circuit" the resulting heat burns the wire off. This happens many times per second and is responsible for the characteristic crackling sound of Mig/Mag welding and the associated spatter. Dip transfer offers the advantage of being able to weld in position, ie vertical.
Spray Transfer - This is achieved at higher voltage settings and is where the filler wire is melted and transfers in globules to the weld pool. Spray transfer offers smoother welds with little welding spatter but cannot be used in position.
The Mig Welders power is usually adjusted in steps and it is the welding arc Voltage that is adjusted NOT the welding Current (amps). The welding arc current will be determined by the combination of welding Voltage that has been set and the welding wire diameter. The greater the Mig welding wire, the more welding current will flow and, therefore, the greater the heat input. Larger diameter welding wire will also allow larger welds to be produced.Scratch/Touch Start Tig Welding Equipment - this is the least expensive and most basic form of Tig Welding equipment and relies on the tungsten Tig welding electrode being touched down onto the job then lifted off to form a welding arc (much the same as MMA welding). Such a Tig Welder is, in fact, an Arc Welding Inverter with a Scratch Start Tig Welding Torch added. The limitation of such a Tig Welder is that the tungsten Tig welding electrode will try to stick to the workpiece when it is touched down and the Tig welding torch is permanently live. The Welders Warehouse would only suggest this type of Tig Welding equipment to customers who primarily want to arc weld, but may occasionally want to do some basic Tig Welding.
High Frequency Start Tig Welding Equipment - this type of Tig Welding equipment uses a burst of high frequency (HF) to establish the welding arc. This is easier and more precise than a Scratch start Tig Welder, as the tungsten Tig electrode does not have to be touched down. An HF start Tig Welder will usually have additional useful features such as Slope Down and Post Gas Flow.Slope Up/Down - Slope Up is where the Tig Welder starts the welding arc at a very low current, then smoothly brings the welding power up to the level set by the operator. Some Tig Welders have a pre set Slope Up time that cannot be adjusted, some have manual control that allow different Slope Up times to be set. Slope down works in the same way but at the end of the weld. When the torch trigger is released, the Tig Welder will fade the power down, instead of stopping it suddenly. Stopping a Tig Welder arc suddenly can cause the centre of the weld to sink (known as "Cratering"), sometimes even to the extent that a pin hole appears. Fading the Tig Welders arc allows the weld pool to solidify more slowly to avoid Cratering.
Pre/Post Welding Gas Flow - As the name suggests, Pre Welding Gas Flow is where the Tig Welder turns on the gas before the arc. This ensures a good welding gas shield. Post welding Gas Flow is where the Tig Welder keeps the welding gas flowing after the arc has extinguished. This is important as it prevents the hot tungsten Tig welding electrode from oxidising as it cools.
Pulse Welding - A Tig Welder with Pulse control allows the operator to weld very thin material with a little more control. The principle is that the Tig Welder emits a burst of higher power to achieve penetration, followed by a burst of lower power to prevent blow through. Pulse welding can also be used to achieve penetration on thicker material whilst at the same time, limiting weld size. Pulse welding is a relatively new addition to the Tig Welder and most professional operators still choose not to use it.
AC Frequency Control - An AC/DC Tig Welder may have AC Frequency Control. The frequency is the speed at which the polarity of the Tig Welding Torch switches from positive to negative and is measured in Hz (Switches per second). A Tig Welder with fixed frequency usually switches at around 70 - 100Hz. A Tig Welder with variable frequency control will typically have a range of around 50 - 250Hz. The effect the frequency has is to "focus" the Tig Welding arc, in the same way you would focus a torch beam. The higher the frequency, the more focused the welding arc. Higher frequency would normally be used to gain greater penetration on thick aluminium, repairing a crack in a casting for example, while lower frequency would be used on thinner sheet aluminium where the heat of the welding arc needs to be spread more to avoid blow through.
