SHIM PRO PS-1000 Series Precision Shim Measuring Stand

The SHIM PRO PS-1000 is a professional-grade benchtop measuring station engineered specifically for the accurate thickness verification of diesel injector adjustment shims, valve train spacers, and calibration washers. In common rail fuel systems, where injection parameters are dictated by micron-level tolerances, the selection of a correctly measured shim is critical to achieving proper armature lift, nozzle stroke, and spring preload . This instrument moves beyond the limitations of hand-held micrometers by providing a rigid, pneumatically damped measuring platform that ensures repeatable results, thereby eliminating the guesswork from injector rebuilding and engine assembly.

The PS-1000 is configured around a high-resolution digital dial indicator with a measuring range of 0-25.4 mm (0-1") and a class-leading resolution of 0.001 mm (0.00005") , offering the precision required for modern Bosch, Denso, and Delphi systems . The indicator features an easy-to-read LCD display with push-button zeroing and instantaneous metric/inch conversion, adapting seamlessly to any service manual specification. The core hardware comprises a heavy-duty cast iron base to dampen vibration, a hardened steel reference anvil, and a spring-loaded or pneumatic cylinder actuation system. When equipped with the pneumatic option, the integrated air regulator and filter unit deliver a consistent closing force on the gauge calipers, eliminating the "heavy hand" variable common in manual measurement . This setup ensures the contact tip descends perpendicularly onto the shim surface every cycle, producing data that is directly applicable to injector test plans.

While universally suited for common rail injector service, the PS-1000's utility extends across a broad spectrum of diesel fuel injection hardware. In the remanufacturing of CRI (Common Rail Injector) and CRIN (Common Rail Injector for commercial vehicles) assemblies, the tool is indispensable for verifying the thickness of calibration shims used to set solenoid valve lift and nozzle needle stroke . It is equally effective for measuring the complex shim packs associated with HEUI (Hydraulically actuated Electronically controlled Unit Injector) and EUI (Electronic Unit Injector) systems, where even minute discrepancies in washer thickness can disrupt injection timing . Furthermore, the open-frame design of the stand facilitates the quick batch measurement of nozzle washers and copper sealing rings, making it an asset for engine rebuilders and parts suppliers managing high-volume inventory.

To achieve optimal accuracy, the PS-1000 must be paired with correct workshop practices. Installation involves securing the unit to a stable, level bench-top away from direct airflow or drastic temperature swings, as thermal expansion can influence dimensional readings. Prior to measurement, the air supply (in pneumatic models) must be regulated to the specified pressure to ensure the plunger moves smoothly without slamming into the shim. The operational workflow requires a clean shim surface, free from oil residue or burrs, placed flat against the reference anvil. The operator lowers the measuring spindle and records the stabilized reading on the digital display. For efficient quality control, users should establish a protocol of calibrating the indicator against a master gauge block at the start of each shift to guarantee traceable accuracy across all repair jobs.

The economic value of this shim measuring tool emerges from its role in reducing system failure rates. In high-pressure common rail systems, incorrect shim selection is a primary cause of unbalanced injector performance, leading to rough idle, excessive emissions, and cylinder-specific knocking . By providing a precise method to pre-screen adjustment shims, the PS-1000 allows technicians to avoid re-work caused by improper valve preload or insufficient armature lift . This translates directly to a lower rate of comeback repairs and improved customer confidence. For diesel injection shops, this instrument enhances professional credibility by ensuring that every injector leaves the bench with consistent, data-verified mechanical adjustments, aligning with the OE manufacturing standards demanded by modern high-horsepower engines.

Q1: Does this shim measuring tool require an external air compressor to operate, or is it available in a manual spring version?
A: The PS-1000 is offered in two actuation variants. We provide a pneumatic version with an air regulator and filter for workshops with existing shop air, offering superior repeatability. We also supply a purely mechanical, spring-operated manual version which uses a hand lever to open and close the calipers, ideal for mobile service units or shops without compressed air .

Q2: What is the maximum thickness of shim that this gauge can accurately measure for CRIN injector repairs?
A: The standard digital indicator provides a full measuring range of 0 to 25.4 mm (1 inch). This covers the entire spectrum of common rail injector shims, from the thin 0.99 mm valve lift shims up to the thicker 8.5 mm spacer washers used in certain Bosch assemblies .

Q3: How does this tool improve injector calibration compared to using a standard manual micrometer?
A: Unlike a micrometer that relies on technician feel (friction thimble pressure), the PS-1000 provides a consistent, fixed measuring force. This eliminates variations caused by different operators and ensures thin shims are not flexed or deformed during measurement, resulting in precise armature lift calculations .

Q4: Is this measurement stand compatible with the shim selection procedures for Bosch CRI 2.0 and CRIN 3 injectors?
A: Yes, the high resolution of 0.001 mm makes it fully compatible. Whether you are measuring the adjustment shims for CRI 2.0 injectors to set solenoid stroke or verifying shim packs for the larger CRIN 3 injectors, the accuracy meets the stringent tolerances required for modern common rail systems .

Q5: What is the standard warranty period for this precision measuring equipment?
A: The PS-1000 includes a standard manufacturer warranty covering defects in materials and workmanship. The electronic digital indicator is covered for a minimum of 12 months, with options for extended service contracts available upon request .

 

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