+44 (0)1827 254 829 sales@prospot.co.uk

British Federal – Stronghold Projection Welder – 75 Stronghold / 100 Stronghold / 150 Stronghold

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Product Description

Stronghold projection welding machines are designed for light to medium duty applications. Built to British Federal’s high-quality standards, they are available as dedicated projection welders, complete with custom built tooling or as conversions from the Stronghold spot welder. Standard Features for projection welding include –

>  EASY TOOLING ALIGNMENT – Spherical seating for the lower platen.
>  TOOLING VERSATILITY – Fully adjustable platen gap.
>  RELIABILITY – 50% duty cycle encapsulated transformer.
>  HIGH QUALITY WELDING – Choice of weld control and AC or MFDC versions.

Stronghold can be fitted with a range of AC Weld Transformers (100 to 150kVA) or MFDC Transformers (100 to 250kVA) as well as a choice of Weld Controls and other options.

MFDC offers the following added benefits –

> Improved weld quality.
> Reduced Power consumption costs.
> Lower peak currents providing increased electrode life.
> 3-phase even load distribution.
> Ideal for welding coated materials and Aluminium.
> Weld times reduced through increased rate of heat input to work piece.
> Reduced weld splash owing to lower peak currents.
> Can be retrofitted to existing machines.

Optional extras:

> Retract/high lift and or 160mm air cylinder.
> 100KVA , 150KVA single phase AC or 100KVA 3-phase DC Medium Frequency Transformer.
> Load Cell for Force verification
> Nut Verification System
> Water Flow Sensors
> Electro-pneumatic regulator for automatic adjustment of weld force with weld program selection.  (Compatible weld control required).
> Bespoke designed tooling
> Linear Transducer for Head Travel position
> Closed circuit water cooled system.
> Integration of automatic nut and bolt feed machines.

Technical Specifications 75 Stronghold 100 Stronghold 150 Stronghold
Continous power @ 100% duty cycle Sp KVA 53 70 106
Max short circuit power Scc KVA 300 330 580
Max welding power Smax KVA 240 350 460
Nominal power @ 50% Duty Cycle S50 KVA 75 100 150
Nominal supply voltage U1n V 415 415 415
Continous primary current at 100% duty cycle I1p A 125 170 250
Supply Frequency Hz 50 50 50
Supply phases 2 2 2
Supply capacity KVA 180 200 350
HRC fuse size to BS88 A 160 200 315
Feed cable c.s.a up to 30m long mm² 50 70 150
Max short circuit primary current I1cc A 730 800 1,400
Max short circuit secondary current I2cc A 34,000 37,000 46,000
Max welding current I2 max A 27,000 29,000 36,000
Duty cycle for max welding Xmax % 4.8 7.1 5.2
Continous secondary current at 100% duty cycle I2p A 6,000 7,299 8,900
Number of taps 3 3 3
Secondary open circuit volts U20 V 8.8 9.9 11.9
Weld cylinder diameter mm 125 125 160
Weld force min/max with a 1.5/5.5 bar supply kN 1.8/6.7 1.8/6.7 3.0/11.0
Weld force min/max with a 20/80 psi supply Ibf 400/1,500 400/1,500 650/2,500
Weld cylinder stroke max mm 76 76 76
Air pressure normal bar 5.5 5.5 5.5
Air pressure max operating bar 7 7 7
Air Connection/hose size BSP/in 1/2″/3/8″ 1/2″/3/4″ 1/2″/3/8″
mm 12/10 12/10 12/10
Cooling water min operating pressure bar 3 3 3
Cooling water consumption lit/min 20 20 20
Cooling water max inlet temp °C 30 30 30
Cooling water connection/hose size BSP/in 1/2″/3/4″ 1/2″/3/4″ 1/2″/3/4″
mm 12/19 12/19 12/19
Shipping specification machine weight kg 570 570 630
machine size mm 590W x 1,285D x 1,685H 590W x 1,285D x 1,685H 590W x 1,285D x 1,685H

All of our machines are priced and sold as ‘Machine Only’ if you wish to have us deliver, Install and/or commission your new purchase, please request prices from our Sales Team. We offer a full range of services to suit all sizes of business and budgets.

+44 (0)1827 254 829

sales@prospot.co.uk