J Series Thrust Bearings

J series thrust bearings are designed and manufactured to allow equipment manufacturers and operators a high quality bearing assembly that is interchangeable with other bearing manufacturer’s designs. They are an equalising type design with six thrust pads which have hardened spherical centre located pivots; this allows operation in both directions of rotation. They can be supplied as a single or double thrust assembly with or without the thrust collar. Machining or complete installation and supply of thermal sensors or load cells can be provided. All assemblies are available with carbon steel, bronze or copper-chrome zirconium alloy backing material for the thrust pads. Below are our standard stocked sizes but assemblies can be made up to 635mm (25”) diameter.Performance Analysis

We can provide a full oil film performance analysis for your application based on parameters such as speed, load and lubricant type to verify safe operation of the bearing.

J Series Web
Part Number Max Whitemetal Diameter
inch(mm)
Internal Diameter
inch(mm)
Surface Area
sq.inch (sq.mm)
KCJ5 5.0 (127.0) 2.5 (63.5) 2.5 (1,613)
KCJ6 6.0 (152.4) 3.0 (76.2) 18.0 (11,612)
KCJ7 7.0 (177.8) 3.5 (88.9) 24.5 (15,806)
KCJ8 8.0 (203.2) 4.0 (101.6) 31.4 (20,260)
KCJ9 9.0 (228.0) 9.0 (228.0) 40.5 (26,130)
Imperial Sizes KCJ5 KCJ6 KCJ7 KCJ8 KCJ9
A – Whitemetal Outside Diameter 5.00 6.00 7.00 8.00 9.00
B – Whitemetal Inside Diameter 2.50 3.00 3.50 4.00 4.50
H – Overall Length 1.75 2.06 2.38 2.69 3.00
W – Oil Inlet Width 0.38 0.38 0.44 0.50 0.56
C – Retaining Ring Outside Diameter 5.375 6.375 7.375 8.375 9.375
D -Retaining Ring Internal Diameter 2.75 3.25 3.75 4.31 4.88
J – Key Width 0.31 0.38 0.38 0.44 0.44
K -Key Projection 0.16 0.19 0.19 0.19 0.19
L -Key Length 0.56 0.66 0.81 0.94 0.94
Metric Sizes KCJ5 KCJ6 KCJ7 KCJ8 KCJ9
A – Whitemetal Outside Diameter 127.0 152.4 177.8 203.2 228.6
B – Whitemetal Inside Diameter 63.5 76.2 88.9 101.6 114.3
H – Overall Length 44.5 52.3 60.5 68.3 76.2
W – Oil Inlet Width 9.7 9.7 11.2 12.7 14.2
C – Retaining Ring Outside Diameter 136.52 161.92 187.32 212.72 238.12
D -Retaining Ring Internal Diameter 69.9 82.6 95.3 109.5 124.0
J – Key Width 7.9 9.7 9.7 11.2 11.2
K -Key Projection 4.1 4.8 4.8 4.8 4.8
L -Key Length 14.2 16.8 20.6 23.9 23.9