Custom Eccentric Solid Rivets

An eccentric rivet carries its pin off the axis it turns on. Fit it into the hinge, turn it through the recess in its head, and that rotation becomes a small sideways movement of the leaf it carries — which is how a door is brought into line after it is already hung. Buyers also call the part an eccentric pin, an eccentric adjustment rivet or an eccentric shoulder rivet.

Not every one of them is turned by hand. Some are pressed or riveted home and the offset is set once, during assembly. Those two cases need a different material state and a different process, which is why it is the first thing we ask about.

Either way the part is unforgiving to make. The offset, the profile of the stepped body and the condition of the head all have to hold at the same time, and the only way to know they do is to check the part against the fitting it goes into — not against the drawing alone.

A cross-recess eccentric rivet we cold form. The pin sits clear of the axis the part turns on — that offset is the adjustment.

What we need from your drawing

• Head diameter and thickness, and how the part is driven — cross recess, hex socket, or no drive at all
• Shoulder diameter and length, and how many steps
• Pin diameter and length
• The offset value and its tolerance, and which features it is measured from
• Overall length, material and surface finish
• How the part is set: turned by hand for adjustment, pressed home, or riveted / orbital riveted — and the finished head shape if it is deformed in your assembly
• The mating part, or its drawing — the hinge or fitting itself is better still, because the checking fixture is built from it

We cold form from wire up to Ø15.8 mm and up to 140 mm long, in carbon steel, stainless steel, brass, aluminium, copper alloy or zinc alloy. Send a sample if there is no drawing.

How we hold it

The offset is checked against your assembly

For an eccentric part we build a checking fixture that simulates how it installs in the mating fitting, and read the offset on 2D vision measurement — instead of measuring the part on its own. Equipment: a concentricity tester covering workpieces from Ø3 to Ø25 mm, and a profile projector with a 0–300 mm range.

Profile held in process, not just inspected

From one programme: on a glass-door hinge job we had no dedicated profile measuring machine for the part, so the profile was held with 360° measurement during production — to roughly 0.02 mm on that job. That is what we achieved there, not a tolerance we promise before seeing your drawing.

Head marks and burrs treated as a tooling problem

Head impressions and edge burrs on this kind of part come from the die, so that is where we fix them rather than sorting the symptom out afterwards. The drive is confirmed against a go/no-go bar. Equipment: optical sorting that discriminates outside diameter and length to 0.01 mm.

Cold formed in our own plant

Multi-station cold heading, and the turning that a stepped or offset body needs, are done in our own plant — so a change to the die or the process is ours to make. Certified to ISO 9001, ISO 14001 and IATF 16949.

Where these parts go

Glass Door and Window Hinges

Hinge fittings for glass doors and windows, where the offset is the adjustment. When these parts are wrong the complaint is specific: the rivet will not seat properly in the fitting, or it seats under stress and works loose in service. That failure mode is what the checking fixture is built around.

Cabinet and Furniture Hinges

A European-style concealed hinge carries several adjusting elements — depth, side and height. An eccentric adjusting rivet is one of them, and it is the one that has to keep its setting after the door has been in daily use. Small parts, but they decide whether the doors on a run of cabinets still line up.

Custom Mechanical Assemblies

Linkages, brackets, latch and drawer hardware — compact assemblies where fastening, eccentric positioning and repeatable movement have to be combined in one custom part rather than built up from several.

Related

• All eccentric rivets
• Eccentric screws for glass door hinges: controlling the geometry
• Eccentric shoulder screws: why the socket angle decides whether they run on the line
• Eccentric locking pins: what to specify before you ask for a price
• Inspection and quality control

Get a quote

Send your drawing or a sample, and tell us how the part is set. We will come back on manufacturability and the control points we would put on it.

Request a Quote / Upload Your Drawing