03G-2 N950004 Torsion Spring for MX48 Power Feeder Black Bore 35mm Wire 4.0mm 43g

Product Description

Need the spring that brings the pressure head of an MX48 power feeder back to its set height? It is the listed torsion spring 03G-2 / N950004: black coated, 35 mm bore, 4.0 mm wire, 43 g. The coil seats on the 35 mm seat and the two formed legs load the feeder head, so pressure comes back the same after every board. Caliper the bore and the wire on your old spring first; those two readings decide fit, not the picture.

A power feeder that presses hard on the first board and light on the fifth, or lets its head hang where the last pass left it, usually has one cheap part at the bottom of the suspect list: the torsion spring. Shops then pick between running it until the head stops returning, buying a whole head, or fitting a hardware-bin spring of roughly the right length but the wrong wire.

It is the torsion spring listed for the MX48 power feeder: 35 mm bore, 4.0 mm wire, 43 g, black coated. The coil winds onto the 35 mm seat and the two legs load the feeder head, so the head returns to its set pressure instead of staying where the board pushed it. That 4.0 mm wire sets return torque; a thinner wire of the same bore sits soft and the head floats.

Both legs are formed rather than cut square: one long and straight, one stepped into a short hook, over a closed coil of about three turns at the 35 mm bore. That shape holds the spring against the head without a separate clip.

The listed material is high-strength spring steel under a black protective coating, so the coil does not rust on a shelf in a damp workshop. At 43 g it posts in an envelope. Price is quoted on request against part number 03G-2 / N950004.

Product Features

Each line below can be checked on the part or with a caliper.

• 35 mm bore — the coil slides onto the 35 mm seat, the first size to take off your old spring.
• 4.0 mm wire — the wire that sets return torque, so a spring reading 4.0 mm behaves like the one the feeder was built around.
• Two formed legs — one long straight leg and one short stepped hook, both formed rather than cut square, so both load points land where the originals sat.
• Closed coil — about three turns over the 35 mm bore, so the winding load is shared along the coil.
• Black coating — the finish covers coil and legs, so a spare kept in a damp workshop does not come out of the drawer rusted.
• 43 g net weight — light enough to hold between two fingers, and small enough that two spares post in one envelope.
• Spring steel body — the listed material for a part that is wound and released on every pass of the head.
• Slide-and-seat fitting — the coil goes over the seat and the legs find their stops, so nothing is bent or shimmed.
• Listed by number — 03G-2 / N950004 is carried against the MX48, so the order is placed by number, not by photo.

Product Parameters

Product Advantages

The usual choice is running a soft spring until the head stops returning, or paying for a whole feeder head. This spring is the third option.

• Replace the spring, keep the head. The symptom is a head that sags back after each pass, and the fix is a 43 g spring rather than a head assembly.
• Two readings settle the fit. 35 mm bore and 4.0 mm wire describe the seat and the torque, so a caliper check happens before the feeder is opened up.
• The same pressure on the first board and the last. A spring that still returns to its set height holds feed pressure even across a run, which is what keeps thickness steady through a batch.
• Order by number the second time. 03G-2 / N950004 identifies the part on its own, so a repeat order or a second spare needs no photo and no measuring.
• Coated before it sits on the shelf. The black coating is on the coil as supplied, so a spare stored for a season is still a spring and not a rusted one.
• A spare costs drawer space, not downtime. At 35 mm bore and 43 g the spring stores in a drawer, so a feeder that stops mid-batch does not wait on a shipment.

Frequently Asked Questions

Will this torsion spring fit my MX48 power feeder?

Yes, if your old spring measures 35 mm bore and 4.0 mm wire. Those two readings cover the seat and the torque, so they confirm fit better than a photo does; if the wire reads under 4.0 mm, the spring on your machine is not this one.

What part number do I quote when I order?

Quote 03G-2 / N950004. The number identifies this spring on its own, and adding 35 mm bore, 4.0 mm wire and 43 g to the enquiry lets it be matched against your feeder before it ships.

Can I replace only the spring, or do I need the whole head?

Only the spring. This is a single 43 g spare part, so a head that no longer returns square is repaired with the spring instead of a complete assembly.

How do I check whether the spring is the cause of uneven pressure?

Release the head and watch where it settles. If it comes back to a different height each time, or stays down where the board pushed it, the return force is gone and the spring is the part to change.

Why does 4.0 mm wire matter — can I fit a thinner spring?

Use 4.0 mm, because the wire diameter sets the return torque. A spring with the same 35 mm bore but thinner wire sits softer, so the head floats and feed pressure drops between boards.

Is the spring bare steel or coated?

Coated. It is supplied black over high-strength spring steel, so the coil and both legs carry a protective finish as delivered.

Will it fit a feeder other than the MX48?

Only if the sizes match. The part is listed against the MX48 power feeder, so on another model check the 35 mm bore and the 4.0 mm wire against your old spring before ordering.

Can I order more than one, and how is the price set?

Yes. Price is quoted on request and follows the quantity, so put the quantity with 03G-2 / N950004 and the 35 mm / 4.0 mm sizes in the same enquiry and the quote comes back against the right part.