HARDENED-STEEL BUSHES

WHY FORMARK BUSHES?

1) HIGH-HARDNESS & DURABILITY

The high case-hardened hardness of 54-60HRC gives your bushes a long-life span, and extra durability to withstand the tough activities of heavy-duty equipment.

5) SMOOTH GREASE DISTRIBUTION

The internal spiral grease grooves, provide excellent distribution and lubrication, giving your gear smoother operating control, and reduced wear.

4) STRONG-TENSILE STEEL

Manufactured using high-grade steel, reducing the chance of breakages and downtime. We machine the bushes from extra high-tensile bearing steel, which is higher strength than standard 1040 and 1045 steels.

2) TIGHT FIT, PRECISE OPERATING

Manufactured with precise interference and clearances, the Formark bushes securely press or freeze-fit into your hole, ensuring a precise and solid operating experience.

6) SIZE RANGE TO MATCH OEM

Our large range of bushes, comes in all dimensions and sizes. Our range caters to many of the matches common OEM brands, and is available stocked in New Zealand for fast delivery.

3) FAST DELIVERY, FAST INSTALL

Reduce your downtime with the Formark Fast Delivery service. Place your order today, and our stock in New Zealand to receive on overnight courier. Also, the 1.5mm chamfer allows for easy and fast installation into the hole.

Our steel bushes are purpose-built from high-grade steel, and case-hardened to endure the toughest of challenges. Formally Kormax Case Hardened Bushes, (now manufactured and sold exclusively by Formark) we can also custom manufacture case-hardened steel bushes to your unique specification. Manufacturing capabilities include bushes, digger pins, roller pins and digger bushes - ideally suited for lubricated applications - manufactured with central, plain, or customised grease grooves for oil or grease.

WHY FORMARK BUSHES?

technical specifications

properties

PHYSICAL PROPERTIES

condition

Metric values

imperial values

maximum Contact Pressure

Sliding

operating temperature (MIN.)

maximum sliding speed (MAX.)

Maximum sliding speed

Maximum PV Factor

Coefficient of Friction

Minimum

Maximum

Lubricated

Lubricated

Lubricated

50 N/mm2

-50 ° C

150 ° C

0.1 m/s

1.5 N/mm2 x m/s

7300 psi

-58 ° F

302 ° F

20 fpm

Sliding

0.2

PHYSICAL PROPERTIES

unit

value

Surface roughness

surface hardness

µm

HB

> 600

> 0.8

tolerances

internal central groove; External Central Groove

internal spiral groove; external central groove

size range id

id tolerance

od tolerance

length

25 to 60mm (metric)

1" to 2-1/4" (Imperial)

2-1/2" to 3-1/2" (imperial)

+0.1mm to +0.15mm

+0.1mm to +0.15mm

+0.15mm to +0.2mm

+0.12mm to +0.17mm

-0.5mm to +0.0mm

-0.5mm to +0.0mm

-0.5mm to +0.0mm

+0.0mm to +0.05mm

+0.0mm to +0.05mm

110 to 120mm (metric)

+0.15mm to +0.2mm

+0.12mm to +0.17mm

-0.5mm to +0.0mm

65 to 100mm (metric)

+0.35mm to +0.40mm

+0.25mm to +0.30mm

-0.5mm to +0.0mm

size range id

id tolerance

od tolerance

length