Some deposits are too small for a standard dispensing needle and too specialized to justify a piezo jet valve. The Incure Sniper SN-02 sits in exactly that gap.
The Finest Bore in the Sniper Range
At 0.057 mm inner diameter, the SN-02 is the narrowest gauge Incure manufactures — 47% narrower than the next size up, the SN-04 at 0.108 mm. For reference against the widest gauge in the same lineup, the SN-18 at 1.039 mm, the SN-02 represents roughly an 18-fold reduction in bore diameter — a span wide enough that the two ends of the range serve fundamentally different dispensing philosophies, maximum flow versus maximum placement precision, rather than points on one continuous scale. That extension matters for a specific class of work: optical fiber pigtail bonding, semiconductor tack pads below 0.1 mm, and precision micro-inlay stone-setting at the smallest stone sizes, where even the SN-04’s deposit is too wide for the bond site. Rather than requiring a dedicated micro-dispensing system or a piezo jet valve to reach this scale, the SN-02 uses the same standard PP Luer Lock hub as every other gauge in the Sniper range — it seats on any standard 1cc to 30cc dispensing barrel and runs on existing dispensing infrastructure.
Why Nickel Silver, Not Phosphor Bronze
The standard Sniper range — SN-18 through SN-30 — is machined from phosphor bronze, and that alloy is correct at those bore sizes. At 0.057 mm, it isn’t. Nickel silver is the only alloy from which a bore this narrow can be consistently machined to specification; phosphor bronze cannot hold the required tolerances at sub-0.2 mm geometry. The higher hardness of nickel silver maintains bore roundness, wall thickness, and concentricity through the machining process at this scale — which is why the entire sub-0.2 mm trio (SN-06, SN-04, SN-02) shares the same material change, not just this one gauge.
That same nickel silver construction happens to be non-magnetic and non-ferrous, which is a relevant property for HDD assemblies and magnetic sensor manufacturing where any ferrous particle contamination near a magnetic component is a defect risk independent of the adhesive itself.
Email Us if a current bond process is producing deposits too large for the bond site even at your finest existing gauge.
Production Requirements at This Bore Size
Because a 0.057 mm bore generates significant backpressure, the SN-02 requires a 1cc syringe pump barrel and a precision low-backpressure pneumatic dispenser with fine control to run consistently in production — a larger barrel or a standard-pressure dispenser won’t deliver the volume control this gauge is capable of. The fluorescent yellow Luer Lock hub color-codes the gauge for immediate identification on lines running multiple Sniper sizes simultaneously, which matters during changeovers where confirming a gauge by eye rather than by measurement saves real time.
Specifications and Application Fit
The SN-02 ships with a 0.169 mm outer diameter, a nominal overall length of 18 mm, and is supplied in packs of 10. It’s currently offered in No Coating only, unlike the wider Sniper gauges that carry a full coating lineup — a reflection of how specialized the demand is at this bore size rather than a limitation on the design itself. Recommended materials include optical fiber pigtail bonding adhesives, sub-0.1 mm semiconductor tack pad deposits, precision micro-inlay stone-setting adhesives, and nano-scale optoelectronic alignment fluids, spanning fiber optics and photonics, semiconductor packaging, jewelry nano-inlay, and precision micro-electronics.
Where the SN-02 Fits in the Sniper Range
The SN-02 sits at the extreme fine end of a range that spans from 1.039 mm at the SN-18 down to 0.057 mm here — a nearly 20-fold span in bore diameter across the full lineup. Its immediate neighbor, the SN-04 at 0.108 mm, covers photonics die-attach pads and sub-0.15 mm micro-inlay wells where the SN-02’s deposit would be smaller than the application actually calls for; choosing between the two comes down to whether the bond site genuinely needs sub-0.1 mm precision or whether 0.108 mm already clears it. The SN-06 at 0.159 mm rounds out the nickel silver trio, positioned as the first gauge below the 0.2 mm threshold rather than the finest available.
For applications well outside this fine-bore territory — low-viscosity flow at maximum volume, or high-viscosity pastes needing more backpressure — the phosphor bronze SN-18 through SN-30 range covers 1.039 mm down to 0.234 mm with a broader coating selection including Electroless Nickel, Nickel PTFE, and Parylene Type C.
Selecting between the SN-02 and any wider gauge is ultimately a question of what the bond site actually requires, not what the equipment is capable of reaching — a gauge finer than necessary only adds backpressure and cycle time without improving the deposit. See Incure’s full Sniper precision dispensing needle range for the complete gauge, alloy, and coating comparison across every bore size. Precision dispensing at this scale often pairs with Incure’s Optik UV optical adhesives for fiber and photonics bonding, or the Uni-Weld Multi-Substrates Bonder line for general precision assembly work. Contact Our Team to confirm dispensing equipment requirements for sub-0.1 mm deposit work.
Visit www.incurelab.com for more information.