Sourced from a number of world-class suppliers to ensure
maximum quality and availability, Strongbar offers a
wide range of case-hardened linear shafting and guide
bars from generous stock. We typically stock, grind and
machine a broad range of both imperial and metric
high-carbon alloy steels and stainless steels in a range
Carbon steels to B.S. 070M55 (solid and hollow/tube)
Should you require custom materials that vary in, for example, chemical
composition, we are pleased to offer the ability to
source and to machine almost all types of material.
Available diameters and tolerances
3mm to 80mm Ψ
3/16" to 3" Ψ and specials up to 6" Ψ
Metric tolerances h6 and h7
Imperial tolerances Class L or S
Chrome and plated shafting to h6, Class L and S tolerances
Special tolerances available to order
View a Shafting Tolerance
Hardness and Depth of Hardness
As one of the more critical elements in shafting
selection, the appropriate choice of material hardness
and the depth of hardness (for case hardened material)
will ensure an appropriate resistance to wear, higher
strength, and increased load-carrying capacity. The
result is an improved resistance against deformation,
bending, and rotational fatigue, as well as the ability
to maintain critical dimensions over a longer period of
time which will extend the life of your applications.
Rockwell 50-55C (Stainless Steels and 440C)
Rockwell 60-65C (Solid and hollow/tube)
Surface finish is a key variable affecting the
smoothness of travel, the load level capacity,
resistance due to friction, and the overall life of a
shaft. Strongbar is pleased to offer surface finishes
better than industry standards whenever your
circumstances require it.
Standard finishes: ground and polished to 8-12 CLA
Stock is generally supplied with a standard finished
length tolerance of ±1/32 for shafts up to 1-1/4
diameter, and ±1/16 for shafts over 1-1/4 diameter.
For metric, we offer a standard finished length tolerance of ±.01mm. Closer tolerances are available
Standard Shaft and Extra-Long Shafts
Standard shaft lengths are stocked in 3m (188") lengths.
Extra-long shafts are
available by special order to provide single imperial lengths up to 300
and single metric lengths up to 7.6m.
In addition, we are capable of providing multi-piece
shafts up to virtually unlimited lengths through shaft
coupling and end-machining whereby a series of shafts
are joined end-to-end. Please call if you requires to inquire about
Another key element to ensure precision in a given
application is the overall straightness of a linear
shaft. With a straighter shaft, cutting tools, gauges
and positioning tables will be able to achieve a higher
degree of accuracy and precision than may otherwise be
achievable. For manufacturers, starting with a
straighter shaft will translate into less work-around
and variance compensation in the later stages of both
the design and construction process, thereby increasing
overall turnaround time and improving the final quality
of the end products.
Standard chamfers on cut-to-length shafting and machined
parts are generally 1/16 x 45°. Depending on your
requirements, any type of chamfering is available.
Please specify your preference at the time of order.
There are many other material considerations which may
need to be taken into account during the material
selection process other than those listed above. A few
of the less common ones include:
Sensitivity to electrical conductivity and/or magnetism
Should you have additional questions at any time,
personnel are available to assist you with your inquiries. Please
directly for more information about other material and material options.
© Strongbar (UK) Ltd. 2008