Why Sierra Electronics Uses Soft Brass Shims (Not Cheap Copper)

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Sierra Electronics engineers all splice shims using precision-punched soft brass that complies with EIA-481 sprocket geometry tolerances. Soft brass protects the two most critical machine interfaces:

  • Feeder sprocket wheels
  • Pick-and-place cutter blades

Competitors use low-grade copper, which is harder, brittle, and dimensionally unstable. Copper shims:

  • Chip and deform, creating burrs
  • Accelerate blade wear
  • Damage sprocket teeth
  • Cause cumulative feeder misalignment
  • Increase downtime and RMA events

One copper shim mishandled by the sprocket drive can ripple into full-line stoppage – and OSHA-level risk if a blade breaks.

Soft Brass = Machine Protection

Factor Soft Brass (Sierra) Cheap Copper (Competitors)
Hardness Low — protects cutting blades High — damages blades over time
Geometry Stability Precision-maintained per EIA-481 Distorts sprocket pitch under load
Edge Quality Smooth & burr-free punching Rough edges scrape feeders
Machine Wear Near-zero increase Cumulative damage to feeder mechanics
Jam Probability Extremely low Significant — particularly at high CPH

Only Sierra Electronics Manufactures Brass Shims in the USA

All competitor “brands” – Antistat, Splicetronics, KHJ, etc. – import copper shims from the same factories and box them differently. That single supply chain decision causes the majority of splice-related feeder failures seen in:

  • Automotive power electronics
  • Defense & aerospace PCB programs
  • Medical device production
  • High-density consumer boards

When uptime matters? Soft brass is the only answer.

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