Shop 300 Series Keyed Couplings
Couplings are used to "couple" a pump and motor or engine together. One coupling half slips over the shaft of your engine or motor, one coupling half
slips over the shaft of your pump, and the flexible insert goes in between to mate the two halves together. The higher the series of your coupling, the more robust the coupling. The close machining tolerances of these couplings assures vibration-free operation and easy, accurate alignment without need for special tools.
Magnaloy Coupling Hub part numbers may be specified using the following format: Start with letter “M” designating Magnaloy, followed by 3 digit
Model Code (100, 200, etc.), then the specific 5 digit Bore/Key Code. All standard combinations of each series are shown below.
Coupling Type:
Material:
Bore Sizes:
View the Catalog:
View the Collection:
Series 300 Keyed Flexible Insert Coupling Halves
Click on the model number in the chart below to view that item.
| Product SKU | Model | Coupling Series | Coupling Type | Bore Size | Key Size | Lead Time | Price |
|---|---|---|---|---|---|---|---|
| M30010208S | 300 1-1/16BX1/4K : Magnaloy 300 HUB 1-1/16" BORE X 1/4" KEY SPECIAL | 300 | Keyed | 1.0625 (1-1/16") | 0.25 (1/4") | 1-3 Days | $42.99 |
| M30010206S | 300 1-1/16BX3/16K : Magnaloy 300 HUB 1-1/16" BORE X 3/16" KEY SPECIAL | 300 | Keyed | 1.0625 (1-1/16") | 0.1875 (3/16") | 1-3 Days | $42.99 |
| M30010205S | 300 1-1/16BX5/32K : Magnaloy 300 HUB 1-1/16" BORE X 5/32" KEY SPECIAL | 300 | Keyed | 1.0625 (1-1/16") | 0.15625 (5/32") | 1-3 Days | $42.99 |
| M30011612-NYLOC | 300 1-1/2BX3/8 : Magnaloy 300 HUB 1-1/2" BORE X 3/8" W/ LIQUID NYLOC | 300 | Keyed | 1.5 (1-1/2") | 0.375 (3/8") | 1-3 Days | $33.99 |
| M30011612DSS45 | 300 1-1/2BX3/8K : Magnaloy 300 HUB 1-1/2" BORE X 3/8" KEY DBL SET SCREW AT 45DEG | 300 | Keyed | 1.5 (1-1/2") | 0.375 (3/8") | 7-10 Days | $33.99 |
| M30011612DSS | 300 1-1/2BX3/8K : Magnaloy 300 HUB 1-1/2" BORE X 3/8" KEY DBL SET SCREW | 300 | Keyed | 1.5 (1-1/2") | 0.375 (3/8") | 7-10 Days | $33.99 |
| M30011612C | 300 1-1/2BX3/8K : Magnaloy 300 HUB 1-1/2" BORE X 3/8" KEY W/CLAMP | 300 | Keyed | 1.5 (1-1/2") | 0.375 (3/8") | 1-3 Days | $63.99 |
| M30011612 | 300 1-1/2BX3/8K : Magnaloy 300 HUB 1-1/2" BORE X 3/8" KEY | 300 | Keyed | 1.5 (1-1/2") | 0.375 (3/8") | 1-3 Days | $31.99 |
| M30011610S | 300 1-1/2BX5/16K : Magnaloy 300 HUB 1-1/2" BORE X 5/16" KEY SPECIAL | 300 | Keyed | 1.5 (1-1/2") | 0.375 (3/8") | 1-3 Days | $42.99 |
| M30011614S | 300 1-1/2BX7/16K : Magnaloy 300 HUB 1-1/2" BORE X 7/16" KEY SPECIAL | 300 | Keyed | 1.5 (1-1/2") | 0.4375 (7/16") | 1-3 Days | $42.99 |
| M300116N | 300 1-1/2BXNOK : Magnaloy 300 HUB 1-1/2" BORE X NO KEY | 300 | Keyed | 1.5 (1-1/2") | NONE | 1-3 Days | $42.99 |
| M30010808DSS45 | 300 1-1/4BX1/4K : Magnaloy 300 HUB 1-1/4" BORE X 1/4" KEY W/DBL SET SCREW AT 45DEG | 300 | Keyed | 1.25 (1-1/4") | 0.25 (1/4") | 7-10 Days | $33.99 |
| M30010808DSS | 300 1-1/4BX1/4K : Magnaloy 300 HUB 1-1/4" BORE X 1/4" KEY W/DBL SET SCREW | 300 | Keyed | 1.25 (1-1/4") | 0.25 (1/4") | 7-10 Days | $33.99 |
| M30010808C | 300 1-1/4BX1/4K : Magnaloy 300 HUB 1-1/4" BORE X 1/4" KEY W/CLAMP | 300 | Keyed | 1.25 (1-1/4") | 0.25 (1/4") | 1-3 Days | $63.99 |
| M30010808 | 300 1-1/4BX1/4K : Magnaloy 300 HUB 1-1/4" BORE X 1/4" KEY | 300 | Keyed | 1.25 (1-1/4") | 0.25 (1/4") | 1-3 Days | $31.99 |
| M30010804S | 300 1-1/4BX1/8K : Magnaloy 300 HUB 1-1/4" BORE X 1/8" KEY SPECIAL | 300 | Keyed | 1.25 (1-1/4") | 0.125 (1/8") | 1-3 Days | $42.99 |
| M30010806S | 300 1-1/4BX3/16K : Magnaloy 300 HUB 1-1/4" BORE X 3/16" KEY SPECIAL | 300 | Keyed | 1.25 (1-1/4") | 0.15625 (5/32") | 1-3 Days | $42.99 |
| M30010812SDSS | 300 1-1/4BX3/8K : Magnaloy 300 HUB 1-1/4" BORE X 3/8" KEY SPECIAL W/DBL SET SCREW | 300 | Keyed | 1.25 (1-1/4") | 0.375 (3/8") | 7-10 Days | $45.99 |
| M30010812S | 300 1-1/4BX3/8K : Magnaloy 300 HUB 1-1/4" BORE X 3/8" KEY SPECIAL | 300 | Keyed | 1.25 (1-1/4") | 0.375 (3/8") | 1-3 Days | $42.99 |
| M30010810-NYLOC | 300 1-1/4BX5/16 : Magnaloy 300 HUB 1-1/4" BORE X 5/16" W/ LIQUID NYLOC | 300 | Keyed | 1.25 (1-1/4") | 0.3125 (5/16") | 1-3 Days | $33.99 |
| M30010810DSS45 | 300 1-1/4BX5/16K : Magnaloy 300 HUB 1-1/4" BORE X 5/16" KEY DBL SET SCREW AT 45DEG | 300 | Keyed | 1.25 (1-1/4") | 0.3125 (5/16") | 7-10 Days | $33.99 |
| M30010810DSS | 300 1-1/4BX5/16K : Magnaloy 300 HUB 1-1/4" BORE X 5/16" KEY DBL SET SCREW | 300 | Keyed | 1.25 (1-1/4") | 0.3125 (5/16") | 7-10 Days | $33.99 |
| M30010810C | 300 1-1/4BX5/16K : Magnaloy 300 HUB 1-1/4" BORE X 5/16" KEY W/CLAMP | 300 | Keyed | 1.25 (1-1/4") | 0.3125 (5/16") | 1-3 Days | $63.99 |
| M30010810 | 300 1-1/4BX5/16K : Magnaloy 300 HUB 1-1/4" BORE X 5/16" KEY | 300 | Keyed | 1.25 (1-1/4") | 0.3125 (5/16") | Same Day | $31.99 |
| M30010805S | 300 1-1/4BX5/32K : Magnaloy 300 HUB 1-1/4" BORE X 5/32" KEY SPECIAL | 300 | Keyed | 1.25 (1-1/4") | 0.1875 (3/16") | 1-3 Days | $42.99 |
| M300108N | 300 1-1/4BXNOK : Magnaloy 300 HUB 1-1/4" BORE X NO KEY | 300 | Keyed | 1.25 (1-1/4") | NONE | 1-3 Days | $42.99 |
| M30010408DSS45 | 300 1-1/8BX1/4 : Magnaloy 300 HUB 1-1/8" BORE X 1/4" W/DBL SET SCREW AT 45DEG | 300 | Keyed | 1.125 (1-1/8") | 0.25 (1/4") | 7-10 Days | $33.99 |
| M30010408DSS | 300 1-1/8BX1/4 : Magnaloy 300 HUB 1-1/8" BORE X 1/4" W/DBL SET SCREW | 300 | Keyed | 1.125 (1-1/8") | 0.25 (1/4") | 7-10 Days | $33.99 |
| M30010408C | 300 1-1/8BX1/4K : Magnaloy 300 HUB 1-1/8" BORE X 1/4" KEY W/CLAMP | 300 | Keyed | 1.125 (1-1/8") | 0.25 (1/4") | 1-3 Days | $63.99 |
| M30010408 | 300 1-1/8BX1/4K : Magnaloy 300 HUB 1-1/8" BORE X 1/4" KEY | 300 | Keyed | 1.125 (1-1/8") | 0.25 (1/4") | Same Day | $31.99 |
| M30010406S | 300 1-1/8BX3/16K : Magnaloy 300 HUB 1-1/8" BORE X 3/16" KEY SPECIAL | 300 | Keyed | 1.125 (1-1/8") | 0.1875 (3/16") | 1-3 Days | $42.99 |
| M30010412S | 300 1-1/8BX3/8K : Magnaloy 300 HUB 1-1/8" BORE X 3/8" KEY SPECIAL | 300 | Keyed | 1.125 (1-1/8") | 0.375 (3/8") | 1-3 Days | $42.99 |
| M30010410S | 300 1-1/8BX5/16K : Magnaloy 300 HUB 1-1/8" BORE X 5/16" KEY SPECIAL | 300 | Keyed | 1.125 (1-1/8") | 0.3125 (5/16") | 1-3 Days | $42.99 |
| M30010410C | 300 1-1/8BX5/16K : Magnaloy 300 HUB 1-1/8" BORE X 5/16" KEY W/CLAMP | 300 | Keyed | 1.125 (1-1/8") | 0.3125 (5/16") | 1-3 Days | $63.99 |
| M300104NC | 300 1-1/8BXNOK : Magnaloy 300 HUB 1-1/8" BORE X NO KEY W/CLAMP | 300 | Keyed | 1.125 (1-1/8") | NONE | 1-3 Days | $73.99 |
| M300104N | 300 1-1/8BXNOK : Magnaloy 300 HUB 1-1/8" BORE X NO KEY | 300 | Keyed | 1.125 (1-1/8") | NONE | 1-3 Days | $42.99 |
| M30010608DSS | 300 1-3/16BX1/4K : Magnaloy 300 HUB 1-3/16" BORE X 1/4" KEY W/DBL SET SCREW | 300 | Keyed | 1.1875 (1-3/16") | 0.25 (1/4") | 7-10 Days | $33.99 |
| M30010608 | 300 1-3/16BX1/4K : Magnaloy 300 HUB 1-3/16" BORE X 1/4" KEY | 300 | Keyed | 1.1875 (1-3/16") | 0.25 (1/4") | 1-3 Days | $31.99 |
| M30010610S | 300 1-3/16BX5/16K : Magnaloy 300 HUB 1-3/16" BORE X 5/16" KEY SPECIAL | 300 | Keyed | 1.1875 (1-3/16") | 0.3125 (5/16") | 1-3 Days | $42.99 |
| M300106N | 300 1-3/16BXNK : Magnaloy 300 HUB 1-3/16" BORE XNK SPECIAL | 300 | Keyed | 1.1875 (1-3/16") | NONE | 1-3 Days | $42.99 |
| M300106NC | 300 1-3/16BXNOK : Magnaloy 300 HUB 1-3/16" BORE X NO KEY W/CLAMP | 300 | Keyed | 1.1875 (1-3/16") | NONE | 1-3 Days | $73.99 |
| M30011208SDSS | 300 1-3/8BX1/4K : Magnaloy 300 HUB 1-3/8" BORE X 1/4" KEY SPECIAL W/DBL SET SCREW | 300 | Keyed | 1.375 (1-3/8") | 0.25 (1/4") | 7-10 Days | $45.99 |
| M30011208S | 300 1-3/8BX1/4K : Magnaloy 300 HUB 1-3/8" BORE X 1/4" KEY SPECIAL | 300 | Keyed | 1.375 (1-3/8") | 0.25 (1/4") | 1-3 Days | $42.99 |
| M30011206SDSS | 300 1-3/8BX3/16K : Magnaloy 300 HUB 1-3/8" BORE X 3/16" KEY SPECIAL W/DBL SET SCREW | 300 | Keyed | 1.375 (1-3/8") | 0.1875 (3/16") | 7-10 Days | $45.99 |
| M30011206S | 300 1-3/8BX3/16K : Magnaloy 300 HUB 1-3/8" BORE X 3/16" KEY SPECIAL | 300 | Keyed | 1.375 (1-3/8") | 0.1875 (3/16") | 1-3 Days | $42.99 |
| M30011212DSS | 300 1-3/8BX3/8 : Magnaloy 300 HUB 1-3/8" BORE X 3/8" W/DBL SET SCREW | 300 | Keyed | 1.375 (1-3/8") | 0.375 (3/8") | 7-10 Days | $33.99 |
| M30011212DSS45 | 300 1-3/8BX3/8K : Magnaloy 300 HUB 1-3/8" BORE X 3/8" KEY W/DBL SET SCREW AT 45DEG | 300 | Keyed | 1.375 (1-3/8") | 0.375 (3/8") | 7-10 Days | $33.99 |
| M30011212C | 300 1-3/8BX3/8K : Magnaloy 300 HUB 1-3/8" BORE X 3/8" KEY W/CLAMP | 300 | Keyed | 1.375 (1-3/8") | 0.375 (3/8") | 1-3 Days | $63.99 |
| M30011212 | 300 1-3/8BX3/8K : Magnaloy 300 HUB 1-3/8" BORE X 3/8" KEY | 300 | Keyed | 1.375 (1-3/8") | 0.375 (3/8") | Same Day | $31.99 |
| M30011210DSS45 | 300 1-3/8BX5/16K : Magnaloy 300 HUB 1-3/8" BORE X 5/16" KEY DBL SET SCREW AT 45DEG | 300 | Keyed | 1.375 (1-3/8") | 0.3125 (5/16") | 7-10 Days | $33.99 |
Coupling Options
Double Set Screws or Clamp options are ideal for improved shaft retention. Just add a 'DSS' or 'C' at the end of the part numbers above to add those options.
Standard Style
Double Set Screw Style
Ideal for improved shaft
retention of keyed shafts.
Clamp Style
Ideal for improved shaft
retention of splined shafts.
Spare Parts
Our full range of flexible inserts permit custom design performance for a wide range of applications. All insert materials offer complete electrical insulation, as our factory design eliminates all metal-to-metal contact. Which Coupling Insert you select will vary based on the application, but the series of your Coupling Insert must match the series of the Coupling Halves. For example, a 200 Series Coupling must use a 200 Series Coupling Insert.
Don't see what you need? Give us a call! Special combinations may be available upon request.
Want to view all keyed coupling options? Click HERE for our full collection.