NSN 3020-00-942-4959 SMB178919, SM-B-178919, SMB178919REVA
Product Details | SPUR ANTIBACKLASH GEAR
3020-00-942-4959 An item having one fixed gear and one free gear, both having the same complement of spur gear teeth, mounted on a common hub. The free gear is attached to the fixed gear by springs and operates as one gear. Upon installation with the mating gear, the teeth of the free moving gear are preset to mesh with teeth other than those of the fixed gear. This spring tension between the fixed gear and the free gear eliminates any free motion between the driver and the driven gear. The gear is used where identical and accurate transmitted motion between gears is required.
Part Alternates: SMB178919, SM-B-178919, SMB178919REVA, 5424469002, 542-4469-002, 3020-00-942-4959, 00-942-4959, 3020009424959, 009424959
Mechanical Power Transmission Equipment | Gears, Pulleys, Sprockets, and Transmission Chain
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 30 | 12 DEC 1965 | 00-942-4959 | 26668 ( GEAR, ANTIBACKLASH, SPUR ) |
Drawings & Photos | NSN 3020-00-942-4959
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Technical Data | NSN 3020-00-942-4959
| Characteristic | Specifications |
|---|---|
| MATERIAL | STEEL COMP 301 FIRST GEAR STEEL COMP 303 HUB STEEL COMP 301 SECOND GEAR STEEL SPRING |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE FIRST GEAR QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE HUB MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE SECOND GEAR |
| SURFACE TREATMENT | PASSIVATE FIRST GEAR PASSIVATE HUB PASSIVATE SECOND GEAR |
| TEETH QUANTITY | 52 |
| TOOTH FORM | STANDARD |
| PRESSURE ANGLE | 20.0000 DEGREES |
| BACKLASH DESIGNATION | GRADE B |
| STYLE DESIGNATOR | 4 PROTRUDING HUBS |
| PITCH DIAMETER | 1.6250 INCHES NOMINAL |
| NOMINAL OUTSIDE DIAMETER | 1.688 INCHES |
| FACE NOMINAL WIDTH | 0.110 INCHES |
| NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.278 INCHES FIRST END 0.031 INCHES SECOND END |
| BORE STYLE | 1 PLAIN BOTH ENDS |
| BORE NOMINAL DIAMETER | 0.250 INCHES BOTH ENDS |
| HUB STYLE DESIGNATOR | 2 SPLIT FIRST END 1 PLAIN SECOND END |
| HUB NOMINAL DIAMETER | 0.312 INCHES FIRST END 0.563 INCHES SECOND END |
| CLAMPING SURFACE NOMINAL LENGTH | 0.250 INCHES FIRST END |
| ATTACHMENT METHOD | CLAMP |
Restrictions/Controls & Freight Information | NSN 3020-00-942-4959
| Category | Code | Description |
|---|---|---|
| Shelf-Life Code: | 0 | Nondeteriorative |
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Demilitarization Code: | A | Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required. |
| Controlled Inventory Item Code: | U | UNCLASSIFIED |
| Precious Metals Indicator Code: | U | Precious metal type is unknown |
| Criticality Code: | X | The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. |
| Category | Code | Description |
|---|---|---|
| NMF Description | 197339 | WHEELS COG/GEAR/PINION I/S |
| Less than car load rating | ||
| Less than truck load rating | R | 65.0 |
| Water commodity Code | 593 | unknown |
| Originating Activity Code | HH | Navy ICP Mechanicsburg, PA 17055-0788 |
| Air Dimension Code | A | Shipment is not a consolidation and does not exceed 72 inches in any dimension. |
| Air Commodity | V | Vehicles, machinery, shop and warehouse equipment and supplies, including special tools and equipment, ground servicing and special purpose vehicles, marine equipment and supplies, repair and maintenance parts for the above. |
| Air Special Handling | Z | No special handling required. |
| Special Handling Code | 9 | unknonwn |
| HAZMAT | ||
| Type of Cargo | Z | No special type of cargo code applicable |
Management | NSN 3020-00-942-4959
Navy| Category | Code | Description |
|---|---|---|
| Cognizance Codes | 9B | Navy-owned stocks of DLA material Naval Inventory Control Point, Mechanicsburg |
| Source of Supply | SMS | Defense Logistics Agency Enterprise Business Systems |
| Agency | DN | Department of the Navy |
| Service Organization | N | U.S. Navy |
| Acquisition Advice Codes | V | TERMINAL ITEM # Identifies items in stock, but future procurement is not authorized. Requisitions may continue to be submitted until stocks are exhausted. Preferred item National Stock Number is normally provided by application of the phrase: When Exhausted Use (NSN). Requisitions will be submitted in accordance with IMM/Service requisitioning procedures as applicable. |
| Controlled Item Code | U | UNCLASSIFIED |
| Shelf Life Code | 0 | Nondeteriorative |
| Purchasing | QTY UOM |
1 EA : Each |