Atlas Copco 1619646708 Set Rubbers (8 PCS) for ZR ZT Oil-Free Compressors

Description

The 1619646708 is the Atlas Copco Set Rubbers (8 PCS) for ZR ZT oil-free compressors, a set of eight elastomeric elements for the buffer position of the machine’s drive coupling. The official parts store lists the set under its coupling-buffer range, and the parts documentation of the oil-free families records the same position as the coupling element of the drive train.

Small rubber parts rarely get attention until vibration puts them on the agenda, yet the whole smoothness of a running compressor sits on them. The 1619646708 is the renewal set for that position. This article explains what the set contains, what the coupling rubbers do in the drive train, which machines the set serves and how a renewal is planned.

Identity of the 1619646708 Set

One coupling takes a fixed number of elastomeric elements, and the count is part of the identity of the set. The designation, the piece count and the machine family of the 1619646708 together settle what this set belongs to, and each of the three has a confirmation path behind it.

What the Official Designation Covers

The official store title names three things: the part type, SET RUBBERS, the contents, 8 pieces, and the machine scope, ZR ZT oil-free compressors. The parts documentation of the oil-free range carries the same position under its coupling element entries, alongside the drive coupling flanges of the same assembly. In plain terms, the 1619646708 is the rubber element set of the drive coupling: the parts that sit between the metal halves of the coupling and let it transmit torque without passing every shock and vibration straight through.

The set arrives at 2.21 kg in a 25 × 18 × 10 cm box, a bench-top renewal for a workshop with standard tools. Each element is an elastomeric moulding shaped to seat in its pocket of the coupling, and the set of eight covers the complete ring of one coupling position.

Why the Set Comes as Eight Pieces

The eight pieces are not a marketing bundle; they are the working content of one coupling. A coupling of this size takes eight rubber elements around its circumference, and replacing them as a set keeps the load shared evenly across the ring. Mixing worn elements with new ones tilts the balance of the coupling and brings the vibration back early, so the set is the correct unit of renewal.

The piece count is also the identity check between neighbouring sets. The same parts family carries a four-piece set under 1619646704 and a six-piece set under 1619646706, each for the coupling size that its count fits. The counts differ because the couplings differ, and the 1619646708 is the eight-element member of that family.

The set format also matches how the position is serviced in practice. A coupling ring is inspected as a whole, and the elements are renewed as a whole, so the 1619646708 arrives with the complete working content of the position in one box. For the maintenance planner this turns the renewal into a single line item instead of a count of loose pieces, and the risk of a short set on the renewal day disappears.

What the Coupling Rubbers Do

The drive coupling is the handshake of the machine: it connects the drive side to the driven side and has to pass the full torque of the motor, every revolution, for years. The rubber elements inside it are what make that handshake quiet.

Torque, Vibration and Misalignment in One Set

The elastomeric elements of the 1619646708 do three jobs at the same time. They carry the torque from the drive side to the driven side through their rubber bodies, they damp the torsional pulses that every rotating machine produces, and they absorb the small amounts of misalignment that remain after installation. The result is a drive train that runs smoothly instead of passing every shock into the bearings and the frame of the machine.

On an oil-free compressor the effect is visible in the readings. A healthy coupling ring keeps the vibration trend of the machine flat and keeps its own noise out of the machine room. When the elements harden or wear, the readings move, and the coupling becomes the first place the technician looks.

What Happens When an Element Wears

An elastomeric element ages under heat, compression and torsional load. The rubber loses flexibility, the surface can crack, and the element loses its exact seat in the coupling pocket. One weak element changes the load on all the others, because the torque it no longer carries is spread over the remaining pieces of the ring that the 1619646708 renews.

The machine gives warning before the coupling gives up: vibration that rises slowly, noise that changes with load, and a coupling that shows wear at inspection. None of these signs should wait for the next long stop, because the parts the coupling protects are far more expensive than the set of rubbers that keeps the shock away from them. This is the point where the 1619646708 earns its place in the spares plan.

Machines That Use the 1619646708

The machine scope of the set is part of its official title, and the family around the 1619646708 shows how the same design covers a range of coupling sizes.

ZR and ZT Oil-Free Compressors

The official store lists the 1619646708 for the ZR and ZT oil-free compressor families, the two-stage machines where a drive coupling of this size sits in the transmission between the drive side and the air end. For a plant that runs oil-free machines, the set belongs to the coupling position of the drive train, and the machine record decides the exact set the coupling takes.

Oil-free machines of these families earn their keep on air quality and on uptime, and both depend on a drive train that runs smoothly. The coupling rubbers are among the least expensive parts of such a machine, yet they sit in the drive train that leads to the precision air end, and a set of fresh elements is the cheapest insurance that line has. For plants that standardize on the 1619646708 across their ZR and ZT fleet, one confirmed set reference covers the eight-element couplings of the whole group.

The Set Family Across Coupling Sizes

The parts documentation records the same design in other sizes: a four-piece set under 1619646704, a six-piece set under 1619646706, and larger sets of ten and twelve pieces recorded for other machines of the oil-free range. The counts follow the couplings, and the eight-piece 1619646708 is the set for the coupling that takes eight elements.

This family view is useful at the order desk. Plants that run several oil-free machines sometimes carry two or more set sizes in the same maintenance system, and the piece count plus the part number keeps the sets apart. Seadweer checks the machine model and serial against the 1619646708 before any quotation, so the count question is settled from the machine record.

Wear Signs and Renewal Practice

Rubber coupling elements are renewal parts by design, and a planned renewal of the set is a short, clean job compared with the damage an unmanaged coupling failure can cause.

Signs Worth an Inspection

Watch the vibration trend of the machine, listen for drive noise that changes with load, and look at the coupling during service windows. Cracked, hardened or deformed elements, rubber dust near the coupling guard and a ring that no longer seats evenly are all reasons to plan the renewal with the 1619646708 rather than to wait for the readings to get worse.

The inspection itself takes minutes. With the coupling guard open, the ring of elements is visible around its circumference, and an element that has lost its shape or its surface shows itself next to its neighbours. A plant that adds this look to every service round catches the aging set early, and the renewal can ride along with work the stop was planned for anyway.

Renewing the Set as One Unit

The renewal replaces the complete ring: the machine is stopped and locked, the coupling is opened, the old elements come out and the eight new elements of the 1619646708 take their seats. The set arrives as one box with all eight pieces, so the job needs no second order and no mixing of old and new parts.

Two details make the job clean. The pockets of the coupling are wiped before the new elements go in, so each element seats without debris under it, and the coupling halves are checked for wear while they are open, since a groove or burr on the metal would shorten the life of the fresh set. The 1619646708 is quoted together with this scope of work in mind, and Seadweer confirms the package details with the quotation.

After the renewal, the vibration trend of the machine is the receipt. A ring of fresh elements brings the readings back to their old line, and the maintenance file keeps a clean before-and-after record of the drive train for the next service round.

Technical Specifications

The tables below collect the identification and physical data of the 1619646708 in one place, exactly as the item data lists them.

Part Identification

Dimensions and Weight

The figures above are the item data of the 1619646708 for handling and logistics reference. The two tables together are the data sheet of the set, and Seadweer repeats them with the quotation so the workshop knows what arrives before it arrives.

FAQ

What is the 1619646708 set used for?

It is the set of eight elastomeric elements documented as the 1619646708 for the drive coupling of ZR and ZT oil-free compressors. The elements carry the torque, damp the torsional vibration and absorb the small misalignment of the drive train.

Why must all eight elements be replaced together?

The ring of elements shares the load of the coupling, and worn pieces shift that load onto the fresh ones. A complete set of eight keeps the ring balanced and stops the vibration from returning early.

What is the difference between 1619646704, 1619646706 and 1619646708?

They are the same design in different set sizes: four, six and eight elements, each for the coupling size that its count fits. The machine record decides which set a coupling takes, and the sets are not mixed.

Which machines take the 1619646708?

The official store lists the set for the ZR and ZT oil-free compressor families. Send your compressor model and serial number to Seadweer, and the fitment of the set is confirmed before the order.

How do I know the coupling rubbers need renewal?

A rising vibration trend, drive noise that changes with load and cracked or hardened elements at inspection are the signs. Any one of them is a reason to plan the renewal with the 1619646708.

How big and how heavy is the set?

The item data of the 1619646708 lists 25 × 18 × 10 cm and 2.21 kg. The set arrives as one box with all eight elements, and the renewal is a bench-top job with standard tools.

More Rubbers Available

Other Atlas Copco rubbers are available upon request. Please check the table below or contact us for details.