The Hammond RM4U1918VBK is a 4U vented rack-mount / desktop instrument enclosure from the RM Series, measuring 7.00 in (178 mm) high, 16.60 in (422 mm) wide and 18.00 in (457 mm) deep. It is built for OEM engineers, test and measurement designers and integrators who need a lightweight, all-aluminum case that can mount in a standard 19 in rack using the included pair of rack mounting ears, or sit on a desktop.
The vented top and bottom panels carry Ø4.32 mm [0.170 in] holes across a 373.06 mm x 127.00 mm [14.688 in x 5.000 in] area, and RM4U18BRKT is listed as its adjustable-depth rear bracket.
Construction uses extruded aluminum side panels and extruded aluminum front and rear panels, each 0.125" (3.2 mm) thick, with flat aluminum top and bottom panels 0.064" (1.6 mm) thick. The drawing specifies a Type 6063 extruded aluminum frame and .064" 5052-H32 aluminum panels. The enclosure is finished in rugged textured black powder coat and uses a knockdown design that ships unassembled for easy handling and shipping protection. Because of the powder coat, panels are not grounded to the frame; the grounding method is determined by the customer.
Per the RM4U1918VBK drawing, the assembly hardware comprises: 2 Mounting Brackets - .125" Aluminum; 16 Screws - Flat Head 4-40 x 3/8"; 8 Screws - Counter Sunk Head 6-32 x 3/8"; 4 Screws - Counter Sunk Head 10-32 x 3/8"; 16 Nuts - #4 Speed Nuts; Four Self Adhesive Rubber Feet - 1421T3. It accepts pull handle part number 1427P1BK, and the ordering table lists RM4U18BRKT as its adjustable-depth rear mounting bracket, sold in pairs.
The RM4U1918VBK is RoHS and REACH compliant, manufactured in North America, and ships in a box at 10.5 lbs (4.76 kg). Enclosures can be factory modified with milling, drilling or printing, and solid models are available in STEP or IGES for design work.
| Type | Rack-Mount |
| Series | RM Series Rack Mount Aluminum Instrument Enclosure |
| Rack Units | 4U |
| Description | rack-mount/ desktop instrument enclosure - vented |
| Part Number | RM4U1918VBK |
| Top/Bottom Style | Vented |
| Short Description | RM 4UX19X18 ENCLOSURE (VENTED) |
| Solid Top/Bottom Equivalent | RM4U1918SBK |
| Overall Depth | 18.00 in (457 mm) |
| Overall Width | 16.60 in (422 mm) |
| Overall Height | 7.00 in (178 mm) |
| Depth (Drawing) | 457.18 mm [18.00 in] |
| Width (Drawing) | 421.65 mm [16.600 in] |
| Height (Drawing) | 177.04 mm [6.970 in] |
| Section Depth (Drawing) | 454.01 mm [17.874 in] |
| Section Height (Drawing) | 173.13 mm [6.816 in] |
| Front/Rear Panel Width (Drawing) | 415.30 mm [16.350 in] |
| Width Across Rack Ears (Drawing) | 482.61 mm [19.000 in] |
| Nominal Size (As Listed, L X W X H) | 7 in x 16.6 in x 18 in (178 mm x 422 mm x 457 mm) |
| UPC | 623980505930 |
| UNSPSC | 43201602 |
| CAD Models | Solid models available in STEP or IGES |
| Factory Modification | Enclosures can be factory modified (milling, drilling, printing etc.) |
| Accepts Pull Handle Part No. | 1427P1BK |
| 19" Rack Mounting Ears Included | Yes |
| Handle Mounting Holes (Drawing) | 4.37 mm [0.172 in] |
| Rack Ear Corner Radius (Drawing) | R3.18 mm [0.125 in] |
| Rack Ear Hole Spacing, Vertical (Drawing) | 165.10 mm [6.500 in] |
| Rack Ear Hole Spacing, Horizontal (Drawing) | 466.10 mm [18.350 in] |
| Rear Bracket Kit (As Listed On Drawing Accessories) | RM3U18BRKT |
| Adjustable Depth Mounting Bracket Part No. (Sold In Pairs) | RM4U18BRKT |
| Speed Nuts | 16 Nuts - #4 Speed Nuts |
| Rubber Feet | Four Self Adhesive Rubber Feet - 1421T3 |
| Mounting Brackets | .125" Aluminum (2) |
| Screws (4-40 X 3/8") | 16 Screws - Flat Head 4-40 x 3/8" |
| Screws (6-32 X 3/8") | 8 Screws - Counter Sunk Head 6-32 x 3/8" |
| Screws (10-32 X 3/8") | 4 Screws - Counter Sunk Head 10-32 x 3/8" |
| Packaging Type | Box |
| Shipping Weight | 10.5 lbs (4.76 kg) |
| Color | Black |
| Design | Knockdown design, ships unassembled |
| Finish | Rugged textured black powder coat |
| Material | Aluminum |
| Grounding | Panels are not grounded to frame due to powder coat finish; grounding method to be determined by customer |
| Side Panels | Extruded aluminum, 0.125" (3.2 mm) thick |
| Front And Rear Panels | Extruded aluminum, 0.125" (3.2 mm) thick |
| Top And Bottom Panels | Flat aluminum, 0.064" (1.6 mm) thick |
| Frame Material (Drawing) | Extruded Aluminum Frame - Type 6063 |
| Panel Thickness (Drawing) | 3.18 mm [0.125 in] |
| Vent Pattern Area (Drawing) | 373.06 mm [14.688 in] x 127.00 mm [5.000 in] |
| Vent Hole Diameter (Drawing) | Ø4.32 mm [0.170 in] |
| Top/Bottom Panel Material (Drawing) | .064" Aluminum (5052-H32), powder coat |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
| Manufacturing Origin | Manufactured in North America |
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The ordering table lists 7.00 in (178 mm) high, 16.60 in (422 mm) wide and 18.00 in (457 mm) deep (4U). The drawing shows 177.04 mm [6.970 in] height, 421.65 mm [16.600 in] width and 457.18 mm [18.00 in] depth, and 482.61 mm [19.000 in] across the rack ears.
Yes. Full-width versions include one pair of 19" rack mounting flanges and hardware; the drawing lists 2 mounting brackets of .125" aluminum.
Yes. It has vented top and bottom panels; the drawing shows Ø4.32 mm [0.170 in] vent holes over a 373.06 mm [14.688 in] x 127.00 mm [5.000 in] area. The solid-panel equivalent is RM4U1918SBK.
Panels are not grounded to the frame due to the powder coat finish. The grounding method is to be determined by the customer.
It accepts pull handle part number 1427P1BK. The adjustable-depth rear mounting bracket for 4-post mounting is RM4U18BRKT (sold in pairs), which adds up to 16.00 in of depth and is compatible with full 16.60" width versions only.
No. The RM Series uses a knockdown design that ships unassembled for easy handling and shipping protection. Shipping weight for the RM4U1918VBK is 10.5 lbs (4.76 kg).
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