Semsons Tech
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The large-stone nozzle. 504 is the biggest tip in the range, calibrated for the higher pickup force that 2.0–3.0 mm rounds need, and it works across both deep-pocket trays — DSSMT-04/SSMWT-04 and DSSMT-05/SSMWT-05. One nozzle covers your entire centre-stone range. Stocked, same-day dispatch from Mumbai and Rajkot.
Talk to our team about specifications, a demo, or installation.
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The 504 sits at the top of the nozzle ladder and is built for a different problem than the others. A 3 mm round carries many times the mass of a pavé stone, so this nozzle is calibrated for higher pickup force — enough vacuum to lift and hold a heavy stone through the full travel of the head without releasing it early. It works across all four deep-pocket trays, covering 2.0 mm right through 3.0 mm.
These are the stones where a mistake is expensive. A dropped 0.9 mm round is a skip; a dropped 2.8 mm round can be a lost stone and a stopped line while somebody finds it. The higher-force calibration on this nozzle exists precisely to make that not happen — and it is why running a worn 504, or substituting a smaller nozzle "just for this run", is a false economy.
| Parameter | Specification |
|---|---|
| Product Code | SSMN-05 |
| Nozzle Designation | 504 |
| Diamond Size Range | 2.0 – 2.1 – 2.2 – 2.3 – 2.4 – 2.5 – 2.6 – 2.7 – 2.8 – 2.9 – 3.0 mm round stones |
| Construction | Precision-machined steel tip with rubber sealing sleeve on a stainless shaft, calibrated for higher pickup force on heavier stones |
| Pickup Method | Vacuum suction through the tip aperture, calibrated for higher-mass stone pickup |
| Pairs With Tray | DSSMT-04 & DSSMT-05 / SSMWT-04 & SSMWT-05 — dual-tray compatibility across the full centre-stone range |
| Wear Class | Consumable wear item — replace when pickup consistency drops |
| Compatible Machines | Semsons Tech Mini Pro, Pro Series, Pro Plus and Double Head 8 Nozzle wax setting machines |
| Sold As | Individual nozzle (single unit) |
| Position in Family | Largest tip diameter — top of the standard nozzle ladder |
| Dispatch | Same-day from our Mumbai & Rajkot warehouses |
Every nozzle covers one stone band and pairs with a specific tray. Find your stone size below and you have both. This nozzle is highlighted.
| Code | Nozzle | Stone Size | Pairs With Tray |
|---|---|---|---|
| SSMN-01 | 502 | 0.8 – 0.9 mm | DSSMT-01 / DSSMT-01L (tray nos. 08-09) |
| SSMN-02 | 502B | 1.0 – 1.2 mm | DSSMT-01 / DSSMT-01L (tray nos. 10-11-12) |
| SSMN-03 | 503 | 1.3 – 1.4 mm | DSSMT-02 / SSMWT-02 (tray nos. 13-14) |
| SSMN-04 | 503B | 1.5 – 1.9 mm | DSSMT-02 & DSSMT-03 / SSMWT-02 & SSMWT-03 |
| SSMN-05 | 504 | 2.0 – 3.0 mm | DSSMT-04 & DSSMT-05 / SSMWT-04 & SSMWT-05 ◀ this product |
One 504 covers the whole 2.0–3.0 mm range, so moving between the DSSMT-04 and DSSMT-05 trays does not mean changing nozzles. Below 2.0 mm, the 503B takes over.
A nozzle is the fastest-wearing part on a stone setting machine, and it rarely fails outright — it degrades. The tip aperture dulls, the sealing sleeve hardens, and your skip rate climbs a little each week until somebody finally notices that the wax models are coming off the bed with gaps in them. Watch for these:
A tired 504 announces itself as stones released early in travel rather than skipped at pickup — you will find them on the bed rather than missing from the wax. If you are picking loose stones off the machine, replace the nozzle before you lose one you cannot find.
Your skip rate tells you before anything else does. When a machine that used to run a full tray clean starts leaving occasional empty positions in the wax — and the tray, the air pressure and the stone size have not changed — the nozzle tip is what changed. Under a loupe you will usually see a dulled or slightly belled tip aperture, or a sealing sleeve that has hardened and stopped sealing.
Honestly, it depends on your hours, your stones and your air quality, so any number we quoted would be a guess dressed up as a spec. What we can tell you is what to watch: rising skip rate, inconsistent pickup on one head of a multi-head machine, and visible tip wear. Floors running continuous shifts treat nozzles as a stocked consumable, not a repair part.
Only within its published band. The tip aperture is sized to seal against a specific stone diameter — too small and it will not lift, too large and it loses vacuum around the girdle and drops the stone mid-travel. The ladder above shows exactly which band each nozzle covers.
On a multi-nozzle head, replacing them as a set keeps pickup consistent across positions — one fresh nozzle beside three worn ones just makes the worn ones obvious. If you are replacing one because it failed early, that is fine; if you are replacing on wear, do the set.
They are stocked. Nozzles ship same-day from our Mumbai and Rajkot warehouses because a nozzle you are waiting on is a machine that is not running. Keep a spare set on the shelf and you never make that call.
The SSMN-05 (504) ships same-day from our Mumbai and Rajkot warehouses, across India and to the 34+ countries we export to. Buying a full set across all five stone bands, or stocking spares for a multi-machine floor? Ask for set pricing rather than ordering them one at a time — and tell us how many nozzle positions your machine has so we send the right count.
Semsons Tech has supplied the Indian jewellery trade since 1978, with 16+ stores and warehouses, 450+ dealers and 40+ distributors behind every consumable we sell.
Not sure which part fits your machine? Send us your machine model and the stone size you are running, and we will confirm the correct item before we dispatch — so you never pay to find out it was the wrong one.
Sales: WhatsApp +91 98216 12340 | Wholesale & bulk orders: WhatsApp +91 80823 38010
Semsons Tech — Where Quality Speaks For Us. Since 1978.
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