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RIMS & WHEELS

Why we use Forging in Critical Areas

DIRECTIONAL STRENGTH

The forging process produces directional alignment (grain flow) for important directional properties of strength, ductility and resistance to impact and fatigue.

IMPACT STRENGTH

Through proper grain flow orientation; the forging process can develop the maximum impact strength and fatigue resistance possible in a metal.

STRUCTURAL INTEGRITY

Forged structural reliability is exceptional compared to other metalworking processes. There are no internal gas pockets or voids that may cause unexpected failure under conditions of high stress or impact. The benefit of forging is that you only have two circumferential welds and not butt welds in the base and no joins in the bead seat bands or flanges.

CONCLUSION

Forging is not the least expensive method but it is the best. When looking for wheels and rims, don’t be fooled by low pricing that may indicate an inferior method of manufacturing.

Northern Wheel products are fully machined

MACHINING RESULTS

The rim base and components are perfectly round in shape and are fully stress relieved. All sections and component interface areas are 100% machine finished for 360° tyre, rim and component mating surfaces. The 28° hub mating surface of the taper is within 10-4 inch. Knurling on bead seat bands and back sections are standard.

X-RAY

All circumferential welds are x-rayed for voids or pockets.

WELDS

High welds are machined to eliminate stress points and to ensure there is no interference with other components.

ENGINEERING

Bases are engineered to pressure vessel standards. Seamless rolled sections are manufactured using ISO-9002 quality standards.

RPM & SAF Profiles

Why we use Forging in Critical Areas

DIRECTIONAL STRENGTH The forging process produces directional alignment (grain flow) for important directional properties of strength, ductility and resistance to impact and fatigue. IMPACT STRENGTH Through proper grain flow orientation; the forging process can develop the maximum impact strength and fatigue resistance possible in a metal. STRUCTURAL INTEGRITY Forged structural reliability is exceptional compared to other metalworking processes. There are no internal gas pockets or voids that may cause unexpected failure under conditions of high stress or impact. The benefit of forging is that you only have two circumferential welds and not butt welds in the base and no joins in the bead seat bands or flanges. CONCLUSION Forging is not the least expensive method but it is the best. When looking for wheels and rims, don’t be fooled by low pricing that may indicate an inferior method of manufacturing.

RPM Profile

RPM (RING ROLLED PRECISION MACHINED) SERIES:

In sizes from 49” to 63”. This design is built to a standard profile specification.

All component parts are interchangeable with other manufacturers standard profile.

V-RPM (VERTICAL MOUNT -RING ROLLED PRECISION MACHINED) SERIES: In sizes from 49” to 63”. Also standard profile in design, however the rim base has dual gutters. Tyres can be removed and fitted with their rims remaining in situ. This eliminates the need to remove nut/bolts and cleats from outside dual positions when removing the inboard tyre. The service time is reduced in two key areas.

1: Tyres are removed by only removing its lock rings.

2: There is no need for torque or re-torque of wheel nuts/bolts.

Both RPM & V-RPM can be used on electric or mechanical drive equipment.

RPM & SAF Profiles

Features & Benefits

Fully Forged

Fully Machined

RPM & SAF Profiles

Features & Benefits

SAF Profile

SAF (SECURE ANGLE FITMENT) SERIES

In sizes from 49” to 63”. The reason for the angled taper is to increase the contact area of the mating surfaces which “locks-up” the components. In other words, component movement is reduced and in turn mechanical wear and damage of rim bases and components is decreased. The design includes a safety lip that avoids any possibility of the tapered side ring ejecting over the back of the base beadseat.

V-SAF (VERTICAL MOUNT – SECURE ANGLE FITMENT) SERIES

In sizes from 49” to 63”. Same benefits as the V-RPM but in the SAF degree profile.

Both SAF & V-SAF can be used on electric or mechanical drive equipment.

Features & Benefits

FEATURES

Seamless rolled sections manufactured using ISO-9002 quality standards

All sections and component interface areas are 100% finish machined for 360 degree uniformity of tyre and rim and wheel mating surfaces

Ultra - sonic testing of circumferential and longitudinal weld joints

Competitive warranties on rim and wheel bases

Replacement rims and wheels available

BENEFITS

Complete component inter-changeability with industry standard components

Reduced cost per hour

Designed to firmly mount and support both radial or bias ply tyres with wider bead seat bands

Totally stress relieved

Lighter construction

Improved service life

Superior steel chemistry and metallurgical characteristics

Dedicated design wheel “T” section configuration incorporated into the centre band of the wheel of 57” and greater