Download installation and maintenance manuals, order spare parts, and find tutorial videos to help with your chip conveyor installation and operation.
Download installation and maintenance manuals, order spare parts, and find tutorial videos to help with your chip conveyor installation and operation.
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Hennig Power Protection is a dedicated division specializing in custom-engineered generator enclosures, fuel systems, and power infrastructure for mission-critical applications across data centers, healthcare, telecommunications, and industrial facilities.
Precision machining, fabrication & welding services from our Rockford, IL facility. Complete manufacturing solutions with ISO-certified quality.
Precision machining for turbine...
Pallet delivery, robotic tending & software for lights-out production
CNC machining centers, lathes, grinders & multi-axis equipment
Safety systems & rod locks for hydraulic & mechanical presses
Rugged hydraulic rod lock for severe and submersible applications. Features enhanced sealing and corrosion-resistant construction for extreme conditions.
The AMLOK RCHX Series rod locks offer specialized power-off clamping designed specifically for severe-duty applications, including harsh environments and submersible operations. Utilizing rugged steel construction and advanced sealing technology, RCHX locks automatically clamp and secure cylinder rods immediately upon hydraulic pressure loss, providing reliable safety and precision positioning even in extreme conditions.
| Key Features | |
| Rugged Construction | Precision-machined heavy-duty steel body, corrosion-resistant for long-term reliability |
| Fail-Safe Operation | Automatically engages via robust disc springs when hydraulic pressure is lost; releases upon pressure restoration. |
| High Clamp Force | Compact design delivers substantial clamping force equally in both tension and compression. |
| Zero Rod Displacement | Locks immediately without shifting the rod position, ensuring precision and accuracy. |
| Enhanced Durability | Oil-filled housing with dual rod wipers and seals protects internal components from abrasive contaminants, extending service life. |
| Flexible Installation | Suitable for direct NFPA cylinder mounting or stand-alone configurations. |
| Proximity Indication | Integrated proximity switch port clearly signals unlock status, enhancing operational safety. |
The AMLOK RCHX Series suited for any heavy-duty application where a hydraulic axis must be securely locked in place to prevent movement. Key application examples include:
| Applications |
| Injection Molding & Die Casting Machines |
| Hydraulic Presses and Forming Machines |
| Machine Tool Axes (Vertical/Horizontal) |
| Amusement and Theatrical Lifts |
| Scissor Lifts & Elevating Work Platforms |
| Material Handling & Industrial Automation |
| Heavy Mobile Equipment |
| Municipal and Utility Vehicles |
| Energy & Infrastructure |
| Any Critical Hold Application |
The RCHX Series employs a mechanical spring-loaded mechanism to immediately engage a robust locking collet onto the cylinder rod when hydraulic pressure is lost. Internally lubricated, lip-type piston seals ensure effective sealing, reduced friction, and extended life. The oil-filled, sealed housing with rod-wiper systems further protects against harsh environmental conditions, making the RCHX ideal for demanding industrial and submersible applications.
Customize your RCHX rod lock for specific environments and needs:Stainless steel or electroless nickel-plated housing for corrosive or washdown conditions.
Viton® seals for high temperatures and aggressive fluids.
Wipers/scrapers prevent contamination; fully sealed units for food processing, chemical, or underwater use.
Dual RCH units can be mounted in tandem for double the holding capacity.
| Product ID | 3D CAD | Buy Online | Rod Diameter² (in) | Rod Diameter Tolerance (in) | Cylinder Bore Diameter (in) | Minimum Release Pressure (PSI) | Maximum Holding Force (lbs) | D±.03 (in) | E±.015 (in) | F±.03 (in) | J±.03 (in) | L±.03 (in) | M±.03 (in) | R±.005 (in) | TF±.005 (in) | FB±.015 (in) | Port (P) | Port (L) | Weight (lbs) | Volume To Cycle | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RCHX-062150-075 | 0.625 | +0.000/-0.003 | 1.50 | 750 | 1100 | 4.37 | 1.595 | 2.41 | 1.09 | 4.00 | 0.78 | 1.625 | 3.437 | 0.44 | SAE 4 | SAE 2 | 11 | 0.4 in³ (6 cm³) | |||
| RCHX-062150-100 | 0.625 | +0.000/-0.003 | 1.50 | 1000 | 1800 | 4.37 | 1.595 | 2.41 | 1.09 | 4.00 | 0.78 | 1.625 | 3.437 | 0.44 | SAE 4 | SAE 2 | 11 | 0.4 in³ (6 cm³) | |||
| RCHX-062150-150 | 0.625 | +0.000/-0.003 | 1.50 | 1500 | 2250 | 4.37 | 1.595 | 2.41 | 1.09 | 4.00 | 0.78 | 1.625 | 3.437 | 0.44 | SAE 4 | SAE 2 | 11 | 0.4 in³ (6 cm³) | |||
| RCHX-100150-075 | 1.000 | +0.000/-0.003 | 1.50 | 750 | 1200 | 4.37 | 1.750 | 2.24 | 1.12 | 4.12 | 0.78 | 1.625 | 3.437 | 0.44 | SAE 4 | SAE 2 | 13 | 0.4 in³ (6 cm³) | |||
| RCHX-100150-100 | 1.000 | +0.000/-0.003 | 1.50 | 1000 | 2000 | 4.37 | 1.750 | 2.24 | 1.12 | 4.12 | 0.78 | 1.625 | 3.437 | 0.44 | SAE 4 | SAE 2 | 13 | 0.4 in³ (6 cm³) | |||
| RCHX-100150-150 | 1.000 | +0.000/-0.003 | 1.50 | 1500 | 2300 | 4.37 | 1.750 | 2.24 | 1.12 | 4.12 | 0.78 | 1.625 | 3.437 | 0.44 | SAE 4 | SAE 2 | 13 | 0.4 in³ (6 cm³) | |||
| RCHX-100200-075 | 1.000 | +0.000/-0.003 | 2.00 | 750 | 2900 | 5.37 | 2.250 | 3.21 | 1.25 | 5.00 | 0.00 | 2.050 | 4.125 | 0.56 | SAE 4 | SAE 2 | 25 | 1.0 in³ (16 cm³) | |||
| RCHX-100200-100 | 1.000 | +0.000/-0.003 | 2.00 | 1000 | 5200 | 5.37 | 2.250 | 3.21 | 1.25 | 5.00 | 0.00 | 2.050 | 4.125 | 0.56 | SAE 4 | SAE 2 | 25 | 1.0 in³ (16 cm³) | |||
| RCHX-100200-150 | 1.000 | +0.000/-0.003 | 2.00 | 1500 | 5600 | 5.37 | 2.250 | 3.21 | 1.25 | 5.00 | 0.00 | 2.050 | 4.125 | 0.56 | SAE 4 | SAE 2 | 25 | 1.0 in³ (16 cm³) | |||
| RCHX-100250-075 | 1.000 | +0.000/-0.003 | 2.50 | 750 | 2900 | 5.98 | 2.500 | 3.69 | 1.71 | 5.63 | 0.00 | 2.550 | 4.625 | 0.56 | SAE 4 | SAE 2 | 36 | 1.0 in³ (16 cm³) | |||
| RCHX-100250-100 | 1.000 | +0.000/-0.003 | 2.50 | 1000 | 5200 | 5.98 | 2.500 | 3.69 | 1.71 | 5.63 | 0.00 | 2.550 | 4.625 | 0.56 | SAE 4 | SAE 2 | 36 | 1.0 in³ (16 cm³) | |||
| RCHX-100250-150 | 1.000 | +0.000/-0.003 | 2.50 | 1500 | 6000 | 5.98 | 2.500 | 3.69 | 1.71 | 5.63 | 0.00 | 2.550 | 4.625 | 0.56 | SAE 4 | SAE 2 | 36 | 1.0 in³ (16 cm³) | |||
| RCHX-137200-075 | 1.375 | +0.000/-0.003 | 2.00 | 750 | 2700 | 5.37 | 2.250 | 3.29 | 1.66 | 5.30 | 0.00 | 2.050 | 4.125 | 0.56 | SAE 4 | SAE 2 | 24 | 0.6 in³ (10 cm³) | |||
| RCHX-137200-100 | 1.375 | +0.000/-0.003 | 2.00 | 1000 | 2700 | 5.37 | 2.250 | 3.29 | 1.66 | 5.30 | 0.00 | 2.050 | 4.125 | 0.56 | SAE 4 | SAE 2 | 24 | 0.6 in³ (10 cm³) | |||
| RCHX-137200-150 | 1.375 | +0.000/-0.003 | 2.00 | 1500 | 5200 | 5.37 | 2.250 | 3.29 | 1.66 | 5.30 | 0.00 | 2.050 | 4.125 | 0.56 | SAE 4 | SAE 2 | 24 | 0.6 in³ (10 cm³) | |||
| RCHX-137250-075 | 1.375 | +0.000/-0.003 | 2.50 | 750 | 2700 | 5.98 | 2.500 | 3.72 | 1.36 | 5.69 | 0.00 | 2.550 | 4.625 | 0.56 | SAE 4 | SAE 2 | 34 | 1.0 in³ (16 cm³) | |||
| RCHX-137250-100 | 1.375 | +0.000/-0.003 | 2.50 | 1000 | 5200 | 5.98 | 2.500 | 3.72 | 1.36 | 5.69 | 0.00 | 2.550 | 4.625 | 0.56 | SAE 4 | SAE 2 | 34 | 1.0 in³ (16 cm³) | |||
| RCHX-137250-150 | 1.375 | +0.000/-0.003 | 2.50 | 1500 | 6000 | 5.98 | 2.500 | 3.72 | 1.36 | 5.69 | 0.00 | 2.550 | 4.625 | 0.56 | SAE 4 | SAE 2 | 34 | 1.0 in³ (16 cm³) | |||
| RCHX-137325-075 | 1.375 | +0.000/-0.003 | 3.25 | 750 | 8200 | 7.75 | 3.250 | 4.50 | 2.63 | 6.84 | 0.00 | 3.250 | 5.875 | 0.69 | SAE 4 | SAE 2 | 53 | 1.8 in³ (30 cm³) | |||
| RCHX-137325-100 | 1.375 | +0.000/-0.003 | 3.25 | 1000 | 11500 | 7.75 | 3.250 | 4.50 | 2.63 | 6.84 | 0.00 | 3.250 | 5.875 | 0.69 | SAE 4 | SAE 2 | 53 | 1.8 in³ (30 cm³) | |||
| RCHX-137325-150 | 1.375 | +0.000/-0.003 | 3.25 | 1500 | 16000 | 7.75 | 3.250 | 4.50 | 2.63 | 6.84 | 0.00 | 3.250 | 5.875 | 0.69 | SAE 4 | SAE 2 | 53 | 1.8 in³ (30 cm³) | |||
| RCHX-175250-075 | 1.750 | +0.000/-0.003 | 2.50 | 750 | 3500 | 6.00 | 2.500 | 4.29 | 2.83 | 6.75 | 0.00 | 2.550 | 4.630 | 0.56 | SAE 4 | SAE 2 | 36 | 0.7 in³ (11.5 cm³) | |||
| RCHX-175250-120 | 1.750 | +0.000/-0.003 | 2.50 | 1200 | 5200 | 6.00 | 2.500 | 4.29 | 2.83 | 6.75 | 0.00 | 2.550 | 4.630 | 0.56 | SAE 4 | SAE 2 | 36 | 0.7 in³ (11.5 cm³) | |||
| RCHX-175250-200 | 1.750 | +0.000/-0.003 | 2.50 | 2000 | 7500 | 6.00 | 2.500 | 4.29 | 2.83 | 6.75 | 0.00 | 2.550 | 4.630 | 0.56 | SAE 4 | SAE 2 | 36 | 0.7 in³ (11.5 cm³) | |||
| RCHX-175325-075 | 1.750 | +0.000/-0.003 | 3.25 | 750 | 8200 | 7.75 | 3.310 | 4.50 | 2.63 | 6.50 | 0.00 | 3.250 | 5.875 | 0.69 | SAE 4 | SAE 4 | 69 | 1.8 in³ (30 cm³) | |||
| RCHX-175325-100 | 1.750 | +0.000/-0.003 | 3.25 | 1000 | 11500 | 7.75 | 3.310 | 4.50 | 2.63 | 6.50 | 0.00 | 3.250 | 5.875 | 0.69 | SAE 4 | SAE 4 | 69 | 1.8 in³ (30 cm³) | |||
| RCHX-175325-150 | 1.750 | +0.000/-0.003 | 3.25 | 1500 | 16000 | 7.75 | 3.310 | 4.50 | 2.63 | 6.50 | 0.00 | 3.250 | 5.875 | 0.69 | SAE 4 | SAE 4 | 69 | 1.8 in³ (30 cm³) | |||
| RCHX-175400-075 | 1.750 | +0.000/-0.003 | 4.00 | 750 | 8200 | 8.38 | 3.500 | 4.50 | 2.27 | 7.25 | 0.00 | 3.820 | 6.375 | 0.69 | SAE 4 | SAE 4 | 81 | 2.4 in³ (39 cm³) | |||
| RCHX-175400-100 | 1.750 | +0.000/-0.003 | 4.00 | 1000 | 12000 | 8.38 | 3.500 | 4.50 | 2.27 | 7.25 | 0.00 | 3.820 | 6.375 | 0.69 | SAE 4 | SAE 4 | 81 | 2.4 in³ (39 cm³) | |||
| RCHX-175400-150 | 1.750 | +0.000/-0.003 | 4.00 | 1500 | 17000 | 8.38 | 3.500 | 4.50 | 2.27 | 7.25 | 0.00 | 3.820 | 6.375 | 0.69 | SAE 4 | SAE 4 | 81 | 2.4 in³ (39 cm³) | |||
| RCHX-200325-075 | 2.000 | +0.000/-0.003 | 3.25 | 750 | 8200 | 7.75 | 3.250 | 4.95 | 3.10 | 8.25 | 0.00 | 3.250 | 5.875 | 0.69 | SAE 4 | SAE 4 | 77 | 1.8 in³ (30 cm³) | |||
| RCHX-200325-100 | 2.000 | +0.000/-0.003 | 3.25 | 1000 | 11500 | 7.75 | 3.250 | 4.95 | 3.10 | 8.25 | 0.00 | 3.250 | 5.875 | 0.69 | SAE 4 | SAE 4 | 77 | 1.8 in³ (30 cm³) | |||
| RCHX-200325-150 | 2.000 | +0.000/-0.003 | 3.25 | 1500 | 16000 | 7.75 | 3.250 | 4.95 | 3.10 | 8.25 | 0.00 | 3.250 | 5.875 | 0.69 | SAE 4 | SAE 4 | 77 | 1.8 in³ (30 cm³) | |||
| RCHX-200500-075 | 2.000 | +0.000/-0.003 | 5.00 | 750 | 8200 | 11.25 | 3.500 | 4.88 | 2.69 | 8.25 | 0.00 | 4.950 | 8.187 | 0.94 | SAE 4 | SAE 4 | 150 | 2.4 in³ (39 cm³) | |||
| RCHX-200500-100 | 2.000 | +0.000/-0.003 | 5.00 | 1000 | 12000 | 11.25 | 3.500 | 4.88 | 2.69 | 8.25 | 0.00 | 4.950 | 8.187 | 0.94 | SAE 4 | SAE 4 | 150 | 2.4 in³ (39 cm³) | |||
| RCHX-200500-150 | 2.000 | +0.000/-0.003 | 5.00 | 1500 | 17000 | 11.25 | 3.500 | 4.88 | 2.69 | 8.25 | 0.00 | 4.950 | 8.187 | 0.94 | SAE 4 | SAE 4 | 150 | 2.4 in³ (39 cm³) | |||
| RCHX-250400-075 | 2.500 | +0.000/-0.003 | 4.00 | 750 | 6000 | 8.50 | 4.000 | 5.75 | 3.82 | 8.50 | 0.00 | 3.813 | 6.375 | 0.69 | SAE 4 | SAE 4 | 102 | 2.4 in³ (39 cm³) | |||
| RCHX-250400-100 | 2.500 | +0.000/-0.003 | 4.00 | 1000 | 8000 | 8.50 | 4.000 | 5.75 | 3.82 | 8.50 | 0.00 | 3.813 | 6.375 | 0.69 | SAE 4 | SAE 4 | 102 | 2.4 in³ (39 cm³) | |||
| RCHX-250400-150 | 2.500 | +0.000/-0.003 | 4.00 | 1500 | 15000 | 8.50 | 4.000 | 5.75 | 3.82 | 8.50 | 0.00 | 3.813 | 6.375 | 0.69 | SAE 4 | SAE 4 | 102 | 2.4 in³ (39 cm³) | |||
| RCHX-250600-075 | 2.500 | +0.000/-0.003 | 6.00 | 750 | 30000 | 12.75 | 5.000 | 7.50 | 4.13 | 10.50 | 0.00 | 5.730 | 9.437 | 1.06 | SAE 4 | SAE 4 | 290 | 7.9 in³ (129 cm³) | |||
| RCHX-250600-100 | 2.500 | +0.000/-0.003 | 6.00 | 1000 | 36000 | 12.75 | 5.000 | 7.50 | 4.13 | 10.50 | 0.00 | 5.730 | 9.437 | 1.06 | SAE 4 | SAE 4 | 290 | 7.9 in³ (129 cm³) | |||
| RCHX-250600-150 | 2.500 | +0.000/-0.003 | 6.00 | 1500 | 50000 | 12.75 | 5.000 | 7.50 | 4.13 | 10.50 | 0.00 | 5.730 | 9.437 | 1.06 | SAE 4 | SAE 4 | 290 | 7.9 in³ (129 cm³) | |||
| RCHX-300600-075 | 3.000 | +0.000/-0.003 | 6.00 | 750 | 17000 | 12.75 | 5.000 | 4.62 | 3.11 | 9.00 | 0.00 | 5.730 | 9.437 | 1.06 | SAE 4 | SAE 4 | 219 | 5.5 in³ (90 cm³) | |||
| RCHX-300600-100 | 3.000 | +0.000/-0.003 | 6.00 | 1000 | 22500 | 12.75 | 5.000 | 4.62 | 3.11 | 9.00 | 0.00 | 5.730 | 9.437 | 1.06 | SAE 4 | SAE 4 | 219 | 5.5 in³ (90 cm³) | |||
| RCHX-300700-075 | 3.000 | +0.000/-0.003 | 7.00 | 750 | 30000 | 14.75 | 6.500 | 7.69 | 5.20 | 11.09 | 0.00 | 6.580 | 10.625 | 1.19 | SAE 4 | SAE 4 | 401 | 9.6 in³ (157 cm³) | |||
| RCHX-300700-100 | 3.000 | +0.000/-0.003 | 7.00 | 1000 | 36000 | 14.75 | 6.500 | 7.69 | 5.20 | 11.09 | 0.00 | 6.580 | 10.625 | 1.19 | SAE 4 | SAE 4 | 401 | 9.6 in³ (157 cm³) | |||
| RCHX-300700-150 | 3.000 | +0.000/-0.003 | 7.00 | 1500 | 50000 | 14.75 | 6.500 | 7.69 | 5.20 | 11.09 | 0.00 | 6.580 | 10.625 | 1.19 | SAE 4 | SAE 4 | 401 | 9.6 in³ (157 cm³) | |||
| RCHX-350800-075 | 3.500 | +0.000/-0.003 | 8.00 | 750 | 40000 | 16.14 | 7.000 | 9.39 | 5.98 | 12.68 | 0.00 | 7.500 | 11.812 | 1.31 | SAE 10 | SAE 4 | 550 | 11.0 in³ (182 cm³) | |||
| RCHX-350800-100 | 3.500 | +0.000/-0.003 | 8.00 | 1000 | 55000 | 16.14 | 7.000 | 9.39 | 5.98 | 12.68 | 0.00 | 7.500 | 11.812 | 1.31 | SAE 10 | SAE 4 | 550 | 11.0 in³ (182 cm³) | |||
| RCHX-350800-150 | 3.500 | +0.000/-0.003 | 8.00 | 1500 | 80000 | 16.14 | 7.000 | 9.39 | 5.98 | 12.68 | 0.00 | 7.500 | 11.812 | 1.31 | SAE 10 | SAE 4 | 550 | 11.0 in³ (182 cm³) | |||
| RCHX-400800-075 | 4.000 | +0.000/-0.005 | 8.00 | 750 | 40000 | 16.14 | 7.000 | 9.42 | 5.91 | 12.78 | 0.00 | 7.500 | 11.812 | 1.31 | SAE 10 | SAE 4 | 541 | 11.4 in³ (187 cm³) | |||
| RCHX-400800-100 | 4.000 | +0.000/-0.005 | 8.00 | 1000 | 55000 | 16.14 | 7.000 | 9.42 | 5.91 | 12.78 | 0.00 | 7.500 | 11.812 | 1.31 | SAE 10 | SAE 4 | 541 | 11.4 in³ (187 cm³) | |||
| RCHX-400800-150 | 4.000 | +0.000/-0.005 | 8.00 | 1500 | 80000 | 16.14 | 7.000 | 9.42 | 5.91 | 12.78 | 0.00 | 7.500 | 11.812 | 1.31 | SAE 10 | SAE 4 | 541 | 11.4 in³ (187 cm³) | |||
| RCHX-5001000-750 | 5.000 | +0.000/-0.005 | 10.00 | 750 | 50000 | 21.64 | 9.380 | 12.73 | 8.13 | 16.98 | 0.00 | 9.620 | 15.880 | 1.81 | SAE 10 | SAE 4 | 1185 | 27.0 in³ (442 cm³) | |||
| RCHX-5001000-1000 | 5.000 | +0.000/-0.005 | 10.00 | 1000 | 75000 | 21.64 | 9.380 | 12.73 | 8.13 | 16.98 | 0.00 | 9.620 | 15.880 | 1.81 | SAE 10 | SAE 4 | 1185 | 27.0 in³ (442 cm³) | |||
| RCHX-5001000-1500 | 5.000 | +0.000/-0.005 | 10.00 | 1500 | 103000 | 21.64 | 9.380 | 12.73 | 8.13 | 16.98 | 0.00 | 9.620 | 15.880 | 1.81 | SAE 10 | SAE 4 | 1185 | 27.0 in³ (442 cm³) |
Each model below is routed to the best next step based on availability.
SITEMA safety catchers have been evaluated according to OSHA Directive CPL 02-01-043. OSHA has determined that the SITEMA safety catcher meets all of the requirements of the directive.
When it comes to reliable and safe machine operation in severe environments, having the right components makes a significant difference. That's why we are excited to introduce the RCHX Exclusion Series Rod Lock — a hydraulically driven rod lock designed specifically for harsh conditions and submersible applications. This latest innovation is a modified version of the original AMLOK RCH Rod Lock, re-engineered to withstand the most demanding applications.
In the world of modern automation, there's a clear shift toward fully electric systems. Learn about the new electric safety brake from Sitema.
Both Hennig and its sister company, Advanced Machine & Engineering, now operate under the Hennig brand.
Same team. Same products. Same company. Different look.
Unifying the two brands under one name clarifies our offerings and makes them easier for you to navigate — one website, one team, one trusted partner.
