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01 l Halfshaft



02 l Outline

KOFCO has received great remarks as the biggest national Halfshaft manufacturer with its excellent performance and the quality items through the latest automated lines.

One of our products, AC-TJ is far better than general TJ from other manufactures with its durability and excellent NVH performance and in particular, Shudderless Joint, developed through the technical tie-up with NTN Japan, is the newest product to reduce the shaking of vehicles.


03 l Characteristics per Each Type

Section T/M shaft Wheel shaft
TJ SFJ DOJ BJ
Image


Characteristics · Possible of sliding on shaft direction
· Operating angles (20°~30°)
· Excellent on NVH sides (less SLID'G resistance)
· Possible of sliding on shaft direction
· Operating angles (23°~25°)
· Excellent on G.A.F.performance
· Excellent on NVH sides
· Shudder(horizontally shaking) glass
· Possible of sliding on shaft direction
· Operating angles (20°~30°)
· Shudder(horizontally shaking) glass
· Impossible of sliding on shaft direction
· Wide operating angles
(40°~ 50°)
Applied Vehicles All vehicle kinds
JM, NF, CM XD, GK,EF, XG, FO, SM, JM All vehicle kinds
English Title Tripod Joint
Shudderless Free-ring Joint Double Offset Joint Birfield Joint

04 l Characteristics per Each Part

Performance
It delivers power from the engine and transmission to wheels and even if the operating angle changes, it delivers as rotational frequency and torque to wheels.
 
Applied Vehicles
Avante XD, Verna, Sonata, Click, Tuscany, EF Sonata, Grandeur XG, Trajet XG, Santafe, Dynasty, Equus, Lavita, Optima (Kia)
 
Structural Parts
Delivering the traction of BJ (Birflied Joint) assembly (Shaft a Wheel) and securing the operating angle
No. Part Name Key Function
BJ Outer-race

Connected to wheels and delivers transmitted traction from the ball to wheels

BJ Cage
Function to control axial directions of inner / outer ring and location of radius direction
BJ Inner-race
Joined with Shaft and delivers the traction of shaft to outer ring through the ball
BJ Ball
Rolling on the groove surface of inner / outer ring then delivers the traction and secures the operating angle
 
Delivering the traction of DOJ (Double Offset Joint) assembly (T/M a Shaft), securing the operating angle, and an axial-flow
No. Part Name Key Function
DOJ Outer-race

Delivering the traction from T/M to the ball

DOJ Cage
Function to control the axial directions of inner / outer ring and location of radius direction
DOJ Inner-race
Delivering the traction of shaft to outer ring through the ball
DOJ Ball
Rolling on the groove surface of inner / outer ring then delivers the traction and secures the operating angle
 
Delivering the traction of TJ (Tripod Joint) Assembly (T/M a Shaft), securing the operating angle, and an axial-flow
No. Part Name Key Function
TJ Outer-race

Delivering the traction from T/M to Trunnion

Clip
Preventing separation on retainer
Retainer
Preventing separation on axial direction of Needle Roller
S/Roller
Protecting Needle Roller and securing the operating angle
N/Roller Smooth rotating of spherical roller
I/Washer Supporting smooth rotation of the needle roller
Trunnion Delivering the traction from spherical roller to shaft
 
Delivering the traction of SFJ (Shudderless Free-Ring Joint) assembly (T/M a Shaft), securing the operating angle, and an axial-flow
No. Part Name Key Function
SFJ Outer-race

Delivering the traction from T/M to Trunnion

Free-Ring
Maintaining of sliding motion on groove surface when joint break status become active
Clip
Preventing separation on retainer
Retainer
Preventing separation on axial direction of Needle Roller
S/Roller
Protecting Needle Roller and securing the operating angle
N/Roller Smooth rotating of spherical roller
Trunnion Delivering the traction from spherical roller to shaft
 
Shaft, D/Damper, Boot
No. Part Name Key Function
Shaft

Delivering the traction from T/M joint to wheel joint

D/DAMPER
Absorbing the shaking from halfshaft assembly when vehicle travels and delivers power
TPE Boot
Securing lubricating motion between each part inside of joint by storing grease
CR Boot Securing lubricating motion between each part inside of joint by storing grease