Flanged Axles

A9 FLANGED CUSTOM ALLOY AXLES – 28 & 31 SPLINE
These are USA manufactured hi-performance 1541 forged induction heat treated alloy axles supplied with cut splines and 10mm heavy duty flanges. Drilled to suit your stud pattern with an option of 7/16″, 1/2″, 5/8″ M12 press in wheel studs or 7/16″, 1/2″, 5/8″ M12 screw in studs.

Item Number Description  
#A9-28-AXLE 28 SPLINE 1541H AXLE (35.02mm SMALL BEARING) – EACH
#A9-31-AXLE 31 SPLINE 1541H AXLE (35.02mm SMALL BEARING) – EACH
A9
FLANGED CUSTOM ALLOY RACE AXLES – 23, 25, 28 & 31 SPLINE

These are USA manufactured hi-performance 4140 Chrome moly forged induction heat treated alloy axles supplied with cut splines and 10mm heavy duty flanges. Drilled and tapped to suit your stud pattern with an option of 7/16″, 1/2″, 5/8″, M12 screw in wheel studs
Item Number Description  
#A9-23S-AXLE 23 SPLINE 4140 AXLE (35.02mm SMALL BEARING) – EACH
#A9-25S-AXLE 25 SPLINE 4140 AXLE (35.02mm SMALL BEARING) – EACH
#A9-28S-AXLE 28 SPLINE 4140 AXLE (35.02mm SMALL BEARING) – EACH
#A9-31S-AXLE 31 SPLINE 4140 AXLE (35.02mm SMALL BEARING) – EACH
A9
FLANGED CUSTOM ALLOY RACE AXLES – 30 SPLINE

These are USA manufactured hi-performance 4140 Chrome moly forged induction heat treated alloy axles supplied with cut splines and 10mm heavy duty flanges. Drilled and tapped to suit your stud pattern with an option of 7/16″, 1/2″, 5/8″ & M12 screw in wheel studs
Item Number Description  
#A9-30S-AXLE 30 SPLINE 4140 AXLE (35.02mm SMALL BEARING) – EACH
A9 FLANGED CUSTOM ALLOY RACE AXLES –  28, 31 & 35 SPLINE
These are USA manufactured hi-performance 4140 Chrome moly forged induction heat treated alloy axles supplied with cut splines and 11mm heavy duty flanges. Drilled and tapped to suit your stud pattern with an option of 7/16″, 1/2″, 5/8″ & M12 screw in wheel studs
Item Number Description  
#A9-28L-AXLE 28 SPLINE 4140 AXLE (39.71mm LARGE BEARING) – EACH
#A9-31L-AXLE 31 SPLINE 4140 AXLE (39.71mm LARGE BEARING) – EACH
#A9-35L-AXLE 35 SPLINE 4140 AXLE (39.71mm LARGE BEARING) – EACH

A9 FLANGED CUSTOM ALLOY RACE AXLES –  30 SPLINE
These are USA manufactured hi-performance 4140 Chrome moly forged induction heat treated alloy axles supplied with cut splines and 11mm heavy duty flanges. Drilled and tapped to suit your stud pattern with an option of 7/16″, 1/2″, 5/8″ & M12 screw in wheel studs

Item Number Description  
#A9-30L-AXLE 30 SPLINE 4140 AXLE (39.71mm LARGE BEARING) – EACH  

A9 FLANGED CUSTOM FORD ALLOY RACE AXLES – 28 & 31 SPLINE
These are USA manufactured hi-performance 4140 Chrome moly forged induction heat treated alloy axles supplied with cut splines and 11mm heavy duty flanges. Drilled to suit your stud pattern with 1/2″ press in wheel studs.

Item Number Description  
#A9-28F-AXLE 28 SPLINE 4140 AXLE (37.00mm FORD BEARING) – EACH  
#A9-31F-AXLE 31 SPLINE 4140 AXLE (37.00mm FORD BEARING) – EACH

A9 FLANGED CUSTOM FORD ALLOY RACE AXLES – 35 & 40 SPLINE
These are USA manufactured hi-performance 1541 forged induction heat treated alloy axles supplied with cut splines and 10mm heavy duty flanges. Drilled to suit your stud pattern with an option of 7/16″ , 1/2″ , 5/8″, M12 and M14 press in wheel studs or 7/16″ , 1/2″ , M12 & 5/8″ screw in studs. 

Item Number Description  
#A9-35XL-AXLE 35 SPLINE 1541H AXLE (45.025mm X-LARGE BEARING) – EACH  
#A9-40XL-AXLE 40 SPLINE 1541H AXLE (45.025mm X-LARGE BEARING) – EACH

A9 FLANGED TOYOTA LANDCRUISER 32 SPLINE REAR OEM REPLACEMENT AXLES
The Factory Toyota Rear Axles are well known for breaking under offroad conditions. Altra 9 has designed and tested a USA manufactured 4140 chrome molly replacement Rear Axle to solve this problem.
Axles to suit the below Landcruiser models.

Item Number Description  
#A9-32-LC-610 32 SPLINE 4140 AXLE DRIVERS SIDE – EACH  
#A9-40XL-AXLE 32 SPLINE 4140 AXLE PASSENGER SIDE – EACH  

A9 FLANGED CUSTOM ALLOY AXLE SPECIFICATIONS
•   CNC machined from premium forged steel
•   Induction hardened to resist bending loads encountered with street/strip use
•   Harder bearing surface area than OEM – for improved bearing / axle life
•   Deeper case hardening than OEM – for superior torsional strength
•   Flanges thicker than OEM
•   Fits OEM bearings
•   Fully ground bearing and seal surfaces
•   Splines cut to the proper involute form
•   Stud patterns machined to your requirements
•   Manufactured in the USA

FORMULA FOR AXLE TORQUE & IMPORTANT INFORMATION
(Max torque of your car (ft-lb) x (gearbox first gear ratio) x (diff ratio) x 90% efficiency.
Each axle should be able to handle all of the maximum torque your car can produce. This will create a 200% safety factor.
Example: A car has 600 ft-lb of torque, Turbo 350 transmission (2.52 ratio 1st gear) and a 9″ diff (4.11 ratio gears) Calculated as: (600) x (2.52) x (4.11) x 90% = 5592 ft-lb
Therefore it is recommended that you use a 31 Spline axle which has a Torque capacity of 7000 ft-lb

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– IMPORTANT INFORMATION –
Under NO circumstances are ALTRA 9 Custom Axles to be welded or torched on any area. Welding or torching on a Custom Alloy Axle changes the structure of the metal and causes a stress riser that could cause axle failure, possibly resulting in accident or injury. Welding or torching of any kind, voids any and all replacement policies that may have been applicable. Axles supplied by ALTRA 9 for vehicles with cambered (bent) housings or using mini or full spools are “void of warranty” as this application applies extreme torque loads to the axles which may cause failure. ALTRA 9 axles will, at its sole discretion, repair or replace free of cost, any part found not to be of ordered, dimensional specifications, prior to assembly or use of parts. ALTRA 9 at its’ discretion will repair, replace or refund the purchase price of the incorrect or defective product or component parts, provided the product in question is returned within a ninety (90) day period from the original purchase date listed on the original invoice. Proper documentation must be presented for the product in question, specifically the original invoice, or a copy thereof, presented by the original purchaser of the product. In addition, ALTRA 9 will not be responsible for damage due to accident or collision, abuse, misuse, or improper installation or service. In no event will ALTRA 9 be responsible for damage including but not limited to down time, lost profits, goodwill, damage to or replacement of equipment and property, loss of use, or cost of substituted products.