Consumer Electronics

Custom Pancake Slip Rings and High Current Solutions for Industrial Use

2026-04-24 10:42:33

Product Overview

In the engineering world, space is a luxury. When vertical clearance is too tight for a traditional capsule or through-bore model, the pancake slip ring (LPKS series) becomes the go-to solution. Similarly, when massive industrial power is required for rotating cable reels, standard components simply won’t cut it. JINPAT (Jinpat Electronics) specializes in solving these two extremes: ultra-low profile signal transmission and high-capacity electrical power.

Actually, many US-based engineers are currently re-evaluating their suppliers for upcoming summer projects. They aren't just looking for a part number; they are looking for a partner who can provide a sample unit for fitment testing and customize the housing to meet specific environmental needs. Whether you need an LPKS069-0305 for a precision turntable or a 400A unit for heavy machinery, JINPAT delivers the engineering depth required for the American market.

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Technical Specifications: LPKS and High-Current Series

1. LPKS069-0305 Pancake Series

Ideal for height-restricted applications like medical centrifuges or small turntables.

  • Height: Ultra-low profile (as thin as 7mm in specific configurations)

  • Through Bore: 69mm (2.7") for easy shaft integration

  • Circuits: 3 Circuits @ 5A

  • Contact Material: Precious Metals (Gold-to-Gold)

  • Housing: Standard FR-4 or Custom Black Protective Case options

2. Heavy-Duty High Current Series

Built for the rigors of cable reels and large industrial cranes.

  • Current Rating: 1 to 3 Circuits up to 400A

  • Voltage: 600VAC / 1000VDC support

  • Bore Size: 32mm (1.25") Through Hole

  • Protection Grade: IP54 / IP65 for outdoor or dusty environments


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The Challenge of Height: Why Pancake Slip Rings Matter

  • When you're dealing with a fixed mechanical structure, adding a slip ring can be a headache. Here’s the thing: a traditional cylinder-shaped slip ring takes up too much vertical space. This is where the pancake slip ring shines. By arranging the circuits in a flat, concentric pattern, we reduce the height significantly.

  • However, a common concern we hear from our San Francisco and New York clients is protection. Most pancake units are sold as "open" kits. Does it come pre-installed in a protective case? At JINPAT, the answer is yes. We offer custom-engineered black protective housings that shield the delicate gold contacts from dust and accidental contact. This is crucial for the "Evaluation Phase"—you need a unit that is rugged enough to be handled and tested in various prototype iterations without failing.


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Scaling to 400A: Reliability for Cable Reels

  • On the other end of the spectrum, some projects demand raw power. A 400A slip ring with a 1.25" through bore is a frequent requirement for US cable reel manufacturers. Why? Because these reels often manage high-voltage power lines for mobile port cranes or heavy mining equipment.

  • The heat management at 400A is the "make or break" factor. JINPAT uses high-purity copper and silver-graphite brushes to keep resistance to an absolute minimum. It turns out that by optimizing the contact pressure and surface area, we can maintain a stable 600VAC connection even at 50 RPM under continuous load. This level of durability is what separates industrial-grade JINPAT products from hobbyist-level components.

From Prototypes to 200-Unit Production

  • We know that right now, many of you are looking for sample units to verify fit and function. JINPAT supports this "quick-start" approach. Whether you need 2 units for 30-day testing or are planning for a 200-unit production run, our supply chain is optimized for the US market's demand for consistency. We provide the datasheets, 3D CAD models, and technical support needed to move your project from the evaluation stage to the final purchase order smoothly.

Conclusion

  • Engineering is about finding the right tool for the job. If your job has strict height limits, the JINPAT pancake slip ring is your answer. If your job involves moving massive amounts of industrial power, our high current rotary joints provide the stability you need. As we move through the second quarter of 2026, JINPAT remains committed to providing the specialized, rugged, and high-spec components that American innovation demands.