Tecna

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A World Of Resistance Welding

Resistance/Spot Welding Specialists

Equipment, Parts, Service and Training

Tecna

TECNA LOGO

SUSPENDED GUNS - ITEMS 3301-3308 - 16 TO 38 kVA AT 50%

330x photo

MAIN WELDER FEATURES

	Pneumatic operated suspended gun, with integrated TE300 or TE450 microprocessor welding control unit.
	High productivity achieved with rational design, reduced dimensions, high welding capacity.
	High electric efficiency.
	Reduced installation costs.
	Totally enclosed, rubber protected for easy and safe operation.
	Gyro suspension on sealed bearings together with a spring balancer guarantees accurate manoeuvrability at any degree.
	Rotation locking device.
	Large selection of arms, enabling to set-up the welder according to the work exigencies.
	Chrome-copper electrode-holders for heavy duty and long life, designed for both straight and angled assembling.
	Adjustable electrodes distance, adjustable short working stroke for heavy duty.
	Temporary extra stroke to reach the areas to be welded.
	Long working stroke to weld reinforcement ribs, jobs in areas difficult to be reached.
	Water-cooled transformer, with epoxy resin coated windings.
	Water cooled arms, electrode-holders and electrodes.
	Synchronous SCR contactor insulated from cooling water circuit with protection thermostat.
	Oiless chromium plated cylinder and shaft for heavy duty operation and long life.

TECHNICAL DATA

ITEM		3301N	3302N	3303N	3304N	3307N	3308N
Gunt type		L	L	C	L	L	L
Nominal power at 50%	kVA	16	23	23	23	38	38
Maximum welding power	kVA	33.2	60.8	63	50	108	88
Short circuit current	kA	14.8	20	21	16.5	27	22.5
Thermal current 100%	A	4000	4250	4250	4250	4900	4900
No load secondary voltage	V	2.8	3.8	3.8	3.8	5	5
Supply voltage 50Hz *	V	400	400	400	400	400	400
Cables section L=30 m	mm²	6	15	15	10	25	20
Delayed fuses	A	35	50	50	50	65	65

Arms spacing	mm	165	165	120	225	155	280
Min. arms length	mm	190	190	-	250	250	250
Max. electrode force (6 bar)	daN	286	338	300	268	695	695
Working stroke	mm	6-25	5-20	5-20	6-25	10-26	10-26
Maximum stroke	mm	30-48	28-40	35-50	35-50	45-60	45-60

Max. arms length	mm	650	800	-	650	1030	820
Max. electrode force (6 bar)	daN	95	93	-	113	156	196
Working stroke	mm	18-72	18-73	-	15-60	40-100	30-75
Maximum stroke	mm	90-140	102-146	-	84-120	165-225	130-175

Compressed air supply	bar	6.5	6.5	6.5	6.5	6.5	6.5
Air consumption for 1000 spots at 5 bar	Nm³	4	4	4	4	7.5	7.5
Hose inside diameter	mm	10	10	10	10	10	10
Water cooling	l/h	240	240	240	240	360	360
Max M.S. sheet tickness
with shorter arms	mm	3+3	4+4	4+4	3.5+3.5	5+5	5+5
with 508 mm arms	mm	1.8+1.8	3+3	-	3+3	3.5+3.5	3.5+3.5
with longest arms	mm	1.2+1.2	2+2	-	2+2	2+2	2.5+2.5
cross wire maximum diameter	mm	10+10	14+14	14+14	12+12	16+16	16+16
Spots per minute
1+1 class A		66	80	80	80	100	100
1.5+1.5 class A		-	32	32	32	44	44
2+2 class A		14	16	16	16	20	20
2.5+2.5 class A		-	-	-	-	14	14
3.2+3.2 class B		-	-	-	-	8	8
Net weight including cables, hoses, gyro suspension and shortest arms	kg	39	44	47	47.5	86	89
Packing: cardboard box	mm	300x850x550		330x1120x630		760x1050x500
Gross weigth with long arm	kg	57	63	57	57.5	119	117
Spring balancer
short arms: capacity	kg	40-45	45-50	45-50	45-50	85-95	90-100
long arms: capacity	kg	40-45	50-55	-	50-55	95-105	95-105

* Different voltages and frequencies on request

The standard supply includes:

	Suspended spot gun with the chosen built-in control unit (TE300 or TE450).
	Earth leakage and circuit breaker switch.
	Air filter-regulator unit with gauge.
	Supply cables and hoses 6.5 m length.

Voltage and frequency to be always specified.

Additional equipment on demand:

	Arms and electrodes: according to tables.
	Different lengths of supply cables and hoses.
	Balancers equipped with rotary and insulated hook (option RI).

If the work to be performed requires it, it is available the control from the ground, option B. For capacity see the technical data table.

On demand, the welding machine is equipped with the sectioning device of cables and supply hoses. It allow a quick replacement of the machine on the production lines.

Spotco
651-638-9711

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