{"id":3471,"date":"2026-07-08T05:14:05","date_gmt":"2026-07-08T05:14:05","guid":{"rendered":"https:\/\/rigid-shaft-coupling.top\/product\/sts7-16-stainless-steel-setscrew-rigid-coupling-miniature-corrosion-resistant-shaft-connector\/"},"modified":"2026-07-08T05:14:14","modified_gmt":"2026-07-08T05:14:14","slug":"sts7-16-stainless-steel-setscrew-rigid-coupling-miniature-corrosion-resistant-shaft-connector","status":"publish","type":"product","link":"https:\/\/rigid-shaft-coupling.top\/ur\/product\/sts7-16-stainless-steel-setscrew-rigid-coupling-miniature-corrosion-resistant-shaft-connector\/","title":{"rendered":"STS7-16 Stainless Steel Setscrew Rigid Coupling \u2013 Miniature Corrosion-Resistant Shaft Connector"},"content":{"rendered":"
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STS7-16 Stainless Steel Setscrew Rigid Coupling \u2013 Corrosion-Resistant Miniature Precision Shaft Connector<\/h1>\n

The STS7-16 stainless steel setscrew rigid coupling<\/strong> is the 316 stainless steel variant of the TS7-16 aluminum alloy model. Dimensionally identical to the TS7-16 in every respect \u2014 16 mm OD, 24 mm length, 6 mm hub length, bore range of 3 to 6 mm \u2014 the STS7-16 differs solely in material: the body is machined from 316 austenitic stainless steel, providing genuine corrosion resistance in environments where the aluminum alloy TS7-16 would oxidise, pit, or suffer surface degradation. At 28 g (versus 11 g for the aluminum version), the added mass reflects the density difference between the two alloy families.<\/p>\n

The primary application driver for the STS7-16 is environment, not mechanical performance. In food processing lines where wash-down routines involve chlorinated cleaning agents, in pharmaceutical manufacturing where ISO cleanroom protocols prohibit aluminum for outgassing concerns, in coastal or marine instrumentation where salt spray attacks unprotected aluminum surfaces, and in chemical analysis equipment where the coupling must resist laboratory reagent contact \u2014 the 316 stainless steel body is the correct material choice.<\/p>\n

Torque and speed ratings are identical to the TS7-16: 0.3 N\u00b7m nominal, 0.6 N\u00b7m maximum, 23,000 rpm maximum speed. The M3 setscrew tightening torque of 0.7 N\u00b7m is unchanged. For a side-by-side comparison of all TS7 and STS7 models, visit our full product catalog<\/a>.<\/p>\n

Technical Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Model<\/td>\nSTS7-16<\/td>\n<\/tr>\n
Body Material<\/td>\n316 Stainless Steel<\/td>\n<\/tr>\n
Outer Diameter (D)<\/td>\n16 mm<\/td>\n<\/tr>\n
Overall Length (L)<\/td>\n24 mm<\/td>\n<\/tr>\n
Hub Length (L1)<\/td>\n6 mm<\/td>\n<\/tr>\n
Available Bore Sizes<\/td>\n3, 4, 5, 6 mm<\/td>\n<\/tr>\n
Setscrew Thread<\/td>\nM3<\/td>\n<\/tr>\n
Wrench Torque<\/td>\n0.7 N\u00b7m<\/td>\n<\/tr>\n
Rated Torque<\/td>\n0.3 N\u00b7m<\/td>\n<\/tr>\n
Maximum Torque<\/td>\n0.6 N\u00b7m<\/td>\n<\/tr>\n
Maximum Rotational Speed<\/td>\n23,000 rpm<\/td>\n<\/tr>\n
Moment of Inertia<\/td>\n8.1 \u00d7 10\u207b\u2077 kg\u00b7m\u00b2<\/td>\n<\/tr>\n
Mass<\/td>\n28 g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Dimension Drawing<\/h2>\n

\"STS7-16<\/p>\n

Stainless Steel Material Advantages<\/h2>\n

\"STS7-16<\/p>\n

316 stainless steel (also designated as AISI 316 or 1.4401) provides genuine corrosion resistance due to its molybdenum content, which distinguishes it from the more common 304 stainless grade and significantly improves resistance to chloride pitting \u2014 the failure mode most relevant to food-grade washdown and coastal marine environments. The coupling body is machined to the same geometric tolerances as the aluminum TS7-16, ensuring that the STS7-16 is a direct material-substitution replacement in any TS7-16 installation without dimensional modification.<\/p>\n

The higher density of stainless steel increases the moment of inertia to 8.1 \u00d7 10\u207b\u2077 kg\u00b7m\u00b2 \u2014 approximately 2.6 times that of the aluminum TS7-16 at 3.1 \u00d7 10\u207b\u2077 kg\u00b7m\u00b2. For servo axis inertia ratio calculations, this difference should be accounted for, particularly in high-acceleration, low-inertia drive systems where coupling inertia represents a meaningful fraction of the total reflected inertia.<\/p>\n

Primary Applications<\/h2>\n
    \n
  • Food processing equipment<\/strong> \u2014 portioning machines, filling lines, and inspection conveyors subject to CIP or washdown cleaning<\/li>\n
  • Pharmaceutical manufacturing<\/strong> \u2014 dispensing pumps, tablet presses, and blister pack machinery in ISO-classified environments<\/li>\n
  • Marine and offshore instrumentation<\/strong> \u2014 position feedback drives on deck equipment and subsea instrument packages<\/li>\n
  • Chemical analysis instruments<\/strong> \u2014 autosampler drives and chromatography column positioning systems<\/li>\n
  • Beverage bottling and canning lines<\/strong> \u2014 filler head drives and capper positioning encoders in wet zones<\/li>\n<\/ul>\n

    Customer Reviews and Case Studies<\/h2>\n
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    \u2605\u2605\u2605\u2605\u2605<\/p>\n

    Netherlands \u2014 Food Equipment OEM<\/p>\n

    We switched from aluminum TS7-16 to STS7-16 on our cheese portioning machine encoder connections after corrosion damage from NaOH washdown cycles. The 316 stainless couplings have been installed for over 14 months with zero corrosion and no maintenance interventions between scheduled line cleans. Material certificates were provided with the first delivery.<\/p>\n

    \u2014 Technical Buyer, Rotterdam<\/p>\n<\/div>\n

    \n

    \u2605\u2605\u2605\u2605\u2605<\/p>\n

    Switzerland \u2014 Pharmaceutical Automation<\/p>\n

    Specified for tablet press encoder feedback drives in a GMP production environment. The stainless body meets our material specification for components in direct contact with the production zone atmosphere. Dimensions were verified against our drawing on first article inspection \u2014 all within tolerance. We have since added this model to our approved supplier list.<\/p>\n

    \u2014 Validation Engineer, Basel<\/p>\n<\/div>\n

    \n

    \u2605\u2605\u2605\u2605\u2606<\/p>\n

    Norway \u2014 Marine Instrumentation<\/p>\n

    Used in a deck-mounted position feedback system for a winch control encoder. The 316 stainless body has shown no surface degradation after 18 months of North Sea exposure. The coupling’s small size fits within the housing envelope without modification. We will continue using this model on future winch control designs.<\/p>\n

    \u2014 Systems Engineer, Bergen<\/p>\n<\/div>\n<\/div>\n

    Frequently Asked Questions<\/h2>\n