Mirraloy® FM Pre-Keyed
Free Machining, Keyed TGP Shaft
Mirraloy FM Pre-Keyed is designed to provide a high degree of accuracy while also exhibiting high strength, ease of machining, and long-term wear life. Most other keyed shafts are typically “Cold Roll” which generally means you get mild steel. Typical hardness is 260 BHN. This shafting material is based on a modified 1144 steel.
Mirraloy FM Pre-Keyed provides superior strength and toughness in service due to its micro alloyed chemistry. Roto bar, mechanical, warpage, and machinability tests are performed at the manufacturing level, prior to keying the shaft, to ensure proper products performance in the field.
Exhibits nearly 50% more tensile strength than that of a 1018 and up to 25% more than 1045.
Features
Typical Properties*
| Hardness | 260 BHN |
| Tensile | 133,000 P.S.I. |
| Yield | 110,000 P.S.I. |
| Elongation in 2″ | 8% min. |
| Machinability | 83% of 1212 |
*Based on 1/2″ test piece
- 1/2″ Dia. with 1/8″ x 1/16″ Keyway
- 5/8″ Dia. with 3/16″ x 3/32″ Keyway
- 3/4″ Dia. with 3/16″ x 3/32″ Keyway
- 7/8″ Dia. with 3/16″ x 3/32″ Keyway
- 1″ Dia. with 1/4″ x 1/8″ Keyway
- 1-1/8″ Dia. with 1/4″ x 1/8″ Keyway
- 1-3/16″ Dia. with 1/4″ x 1/8″ Keyway
- 1-1/4″ Dia. with 1/4″ x 1/8″ Keyway
- 1-3/8″ Dia. with 5/16″ x 5/32″ Keyway
- 1-7/16″ Dia. with 3/8″ x 3/16″ Keyway
- 1-1/2″ Dia. with 3/8″ x 3/16″ Keyway
- 1-5/8″ Dia. with 3/8″ x 3/16″ Keyway
- 1-15/16″ Dia. with 1/2″ x 1/4″ Keyway
- 2″ Dia. with 1/2″ x 1/4″ Keyway
- 2-3/16″ Dia. with 1/2″ x 1/4″ Keyway
- 2-7/16″ Dia. with 5/8″ x 5/16″ Keyway
- 2-15/16″ Dia. with 3/4″ x 3/8″ Keyway
Lengths
10/13 Ft. R/L, 20/26 Ft. R/L and Custom Cuts
Typical Diameter Tolerances
| 1/2” to 1-1/2” Round | (+.000”/-.001”) |
| Over 1-1/2” to 2-15/16” Round | (+.000”/-.002”) |
Comparison of Mirraloy® FM vs Commercial Grade Carbon Steels*
| Mirraloy® FM | 1045 | 1018 | |
|---|---|---|---|
| Tensile Strength | 133,000 PSI | 91,000 PSI | 70,000 PSI |
| Yield Strength | 110,000 PSI | 77,000 PSI | 50,000 PSI |
Consider Mirraloy FM Pre-Keyed
Provides superior strength and toughness in service due to its micro alloyed chemistry.