Easy to use and set up

Pneumatic Actuation

Mechanical stop limits

Model RJ Machine Base

A simple radial compression machine, used to attach stents to balloon catheters and many other applications in medical device manufacturing

Using the same precise, low-friction compression stations as the CX machine, the model RJ can achieve good crimping results without electronics. This simple machine controls the pressure level and toggles open/close an air-actuated compression station.

A complete crimping machine includes a Model RJ machine base and a radial compression station. Model RJ is compatible with a variety of Blockwise radial compression stations, which are chosen based on 1) diameter range, 2) length range, 3) radial force range, and 4) die material.

An air cylinder with adjustable pressure opens and closes the compression station. A stop screw limits the closing diameter, allowing a choice of force (pressure regulator) or diameter (stop screw) control.

Knowledge Base: Crimping Diameter and Force Control

An optional heater control box controls the die temperature of metal-die compression stations. Temperature control is not available with plastic-die compression stations..

The RJ’s controls are easy to understand and use. There are no electronics (except with the heating option). A toggle valve opens or closes the compression station. The closing is limited by either an adjustable stop screw or by a force balance against your product sample, adjustable via the pressure regulator / gauge.

An optional heater control box controls the die temperature of metal-die compression stations. Temperature control is not available with plastic-die compression stations..

The RJ’s controls are easy to understand and use. There are no electronics (except with the heating option). A toggle valve opens or closes the compression station. The closing is limited by either an adjustable stop screw or by a force balance against your product sample, adjustable via the pressure regulator / gauge.

Required Installation Connections – Model RJ
Description Physical Specs Functional Specs
Compressed Air Actuates the Compression Mechanism
(see Knowledge Base: Compressed Air &
High Pressure Gas Connections)		 Instant Tube Fitting Accepts ¼-inch OD Plastic Tube 6.9 to 8.3 bar (100 to 120 psi)

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  • Model RJ with Alpha-Crimp™ Station

    A simple radial compression machine, used to attach stents to balloon catheters and many other applications in medical device manufacturing.
    Designed specifically for PTCA-sized balloon-expandable crimping, the Alpha-Crimp™ compression station introduces unprecedented geometric accuracy and near-zero die-to-die gaps. Extreme precision, very low friction, no die-to-die wear, high radial force capability, high durability.

    Diameter Length Max Radial Force Die Material
    0 - 8 mm 75 mm 2670 N Hardened Stainless Steel

  • Model RJ with J-Crimp™ Station

    A simple radial compression machine, used to attach stents to balloon catheters and many other applications in medical device manufacturing.
    Blockwise’s workhorse compression station for a decade, with hundreds in service. For medium-sized general-purpose crimping, the RJ with J-Crimp™ provides good force or diameter control and very small die-to-die gaps. No die-to-die wear, proven superior durability.

    Diameter Length Max Radial Force Die Material
    0 - 16 mm 62 or 124 mm 955 N Hardened Stainless Steel

  • Model RJ with RC Station

    The Blockwise type RC radial compression stations are simple, low-cost crimpers with no electronics, suitable for a wide variety of applications in medical device manufacturing, R&D labs, and catheter labs.
    The Model RCJ is an air actuated RC mounted on the RJ base. This includes open/close toggle valve, pressure regulator, and gauge. Simple closed-stop adjusting screw.

    Diameter Length Max Radial Force Die Material
    0 - 26 mm 38 mm 425 N POM Acetal Coploymer

  • Model RJ with Red Crimp™ Station

    A simple radial compression machine, used to attach stents to balloon catheters and many other applications in medical device manufacturing.
    For longer-length or higher-force crimping, the Red-Crimp mechanism brings Alpha-Crimp-like accuracy to larger sizes. Stainless steel dies are guided by extremely precise bearing balls, resulting in near-perfect geometrical accuracy. Very low friction, no die-to-die wear, near-zero die-die gaps, high radial force capability, high durability.

    Diameter Length Max Radial Force Die Material
    0 - 16 mm 310 mm 2670 N Hardened Stainless Steel

  • Model RJ with RV Station

    The RVJ is a simple radial compression machine, used to attach stents to balloon catheters and many other applications in medical device manufacturing. It comes on a pneumatic base, which includes open/close toggle valve, pressure regulator, and gauge. Simple closed-stop adjusting screw.

    Diameter Length Max Radial Force Die Material
    0 - 41 mm 25 or 50 mm 600 N POM Acetal Copolymer

  • Model RJ with Twin-Cam™ Station

    A simple radial compression machine, used to attach stents to balloon catheters and many other applications in medical device manufacturing.
    For very large diameter crimping, the Large Twin-Cam compression station provides very low friction and wear, and the best process control available for the size range. Small gaps, no die-to-die wear, high durability

    Diameter Length Max Radial Force Die Material
    0 - 60 mm 124, 186, 248, 310 mm 1450 N Hardened Stainless Steel