The 1550WM is a low-profile 120 mm x 100 mm diecast aluminum enclosure in the 1550 Series, supplied in natural aluminum with an IP66 gasket. It is a practical housing for OEM circuit boards, sensor interfaces and instrument electronics where a slim, water-tight metal box is needed.
Its die-cast aluminum alloy is tough yet easy to machine, and the unpainted surface is vibra finished for a smooth feel with no sharp edges. The lid closes on a lap joint that protects against dust and splashing water and is secured by M3.5 x 0.6 x 12 mm stainless steel Philips head machine screws threaded into factory tapped holes.
Hammond lists the 1550WM at 4.74 in x 3.95 in x 1.23 in (120 mm x 100 mm x 31 mm); the series table gives a nominal 4.72 x 3.94 x 1.38 in (120 x 100 x 35 mm) including the 4 mm (0.16 in) lid. Inside, the drawing shows 115.28 mm [4.54 in] of box length and 95.28 mm [3.75 in] of box width. Shipping weight is 0.49 lbs (0.22 kg).
Smooth internal walls without ribs let connectors go in without additional milling, and a 2° lower side-wall draft angle eases PC board mounting. The series is designed to meet IP54 without a gasket and IP66 with one; this part ships with the EVA foam gasket loose inside, rated up to 65°C (149°F), to be fitted with lid screws torqued at 55 cN.m.
The 1550WM is RoHS and REACH compliant and packed in shrink wrap. Spare IP66 gaskets are 1550MEGASKET, and 1550MSGASKET silicone gaskets upgrade the box to IP67. Factory modification and .stp or .x_t solid models are available.
| Type | Die-cast box, water-tight |
| Gasket | Includes IP66 gasket (EVA foam, shipped loose inside enclosure) |
| Series | 1550 Series Diecast Aluminum Enclosures |
| Description | diecast aluminum enclosure |
| Part Number | 1550WM |
| Short Description | DIECAST BOX 1550 WATERTIGHT |
| Solid Models | .stp or .x_t |
| Factory Modification | Milling, drilling, printing etc. available from factory on quote |
| Lid Allowance | Add 0.16 in (4 mm) to enclosure depth for lid |
| Inside Box Width | 95.28 mm [3.75 in] |
| Size (L X W X H) | 4.74 in x 3.95 in x 1.23 in (120 mm x 100 mm x 31 mm) |
| Inside Box Length | 115.28 mm [4.54 in] |
| Series Table Note | Dimensions include lid. Lid height is 4 mm (0.16 in) |
| Nominal Size - Width (Series Table) | 3.94 in (100 mm) |
| Nominal Size - Height (Series Table) | 1.38 in (35 mm) |
| Nominal Size - Length (Series Table) | 4.72 in (120 mm) |
| UPC | 623980057675 |
| UNSPSC | 39121301 |
| Drawing Reference | 1550M |
| Replacement Screws (Pack Of 100) | 1550MS100 |
| Same Size, Gasket Included, Black | 1550WMBK |
| Driver Bit For Tamper-Proof Screws | SCDRIVET15-2 |
| Replacement IP66 Gasket Kit (Pair) | 1550MEGASKET |
| Same Size Without Gasket (Unpainted / Black) | 1550M / 1550MBK |
| Tamper-Resistant Torx-With-Pin Screws (Pack Of 50) | 1550MS50T |
| IP67 Upgrade Gasket Kit (Pair, Silicone, -40°C To +150°C) | 1550MSGASKET |
| Packaging Type | shrink wrap |
| Shipping Weight | 0.49 lbs (0.22 kg) |
| Color | Natural Aluminum |
| Joint | Lap joint construction (protection against dust and splashing water) |
| Finish | Natural vibra finish (smooth surface, no sharp edges) |
| Material | Aluminum (Die-Cast Alloy) |
| Lid Screws | M3.5 x 0.6 x 12 mm stainless steel Philips head machine screws into factory tapped holes |
| Internal Walls | No internal ribs |
| Side Wall Draft Angle | Low (2° less) for easy PC board mounting |
| Lid Screw Holes (Drawing) | 4X M3.5-0.6 |
| IP Rating | IP66 |
| IP66 Condition | With properly installed gasket and lid screws torqued at 55 cN.m |
| Protection (Series) | Designed to meet IP54 without a gasket or IP66 with a gasket; IP67 upgraded gaskets available |
| IP66 Gasket Material / Rating | EVA foam, rated up to 65°C (149°F) |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Listed size is 4.74 in x 3.95 in x 1.23 in (120 mm x 100 mm x 31 mm). The series table nominal is 4.72 x 3.94 x 1.38 in (120 x 100 x 35 mm) including the 4 mm lid.
Yes, it includes the IP66 EVA foam gasket, shipped loose inside the enclosure. The same size without a gasket is 1550M (unpainted) or 1550MBK (black).
Yes. The black powder-coated version with the IP66 gasket is 1550WMBK.
Install the supplied gasket properly and torque the lid screws at 55 cN.m. Without a gasket the series is designed to meet IP54.
Replacement screws for unpainted versions are 1550MS100 (package of 100); tamper-resistant screws are 1550MS50T (package of 50) with driver bit SCDRIVET15-2.
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