|The objective of this letter is to cover additional technical specifications, complementing |
the information already covered in the "SKF Power transmission products" catalogue
(publication 11015) and its online version available on www.skfptp.com.
All the SKF Power transmission products are manufactured according to the highest
In addition, it is worth emphasizing that all SKF Power transmission products are fully
Please contact your local SKF Authorized Distributor in case of any further questions
|SKF Chains completely conform to international standards (ISO) and other advanced |
industrial standards (i.e. ANSI and DIN) as shown below:
|Main materials used in the chain construction: |
All SKF Sprockets are manufactured according to ISO606 & ASME B29.100 standard.
The sprockets are made from steel material C-45 and premium carbon steel no. 20
on hub material if welded. For some special sprockets gray cast iron HT250
or cast iron 250 material is used.
Sprocket 25T and below are hardened as standard (typically 35-40 HRC).
This is only valid for sprocket teeths manufactured with steel material C-45.
Surface treatment such as black oxide and zinc plating can be offered upon request.
Tolerances are machined according to DIN 8196.
All sprockets are completely deburred and protected with rustproof oil.
|SKF Belts are manufactured to a "worldwide" specification, PTP-0299 (Feb 2000), |
which is compatible with all commonly used standards:
|All the belts are manufactured and measured to their "Datum" (Ld), "Pitch" (Lp) or "Working" |
(Lw) length. (All these definitions are the same and relate to an exact set-width in detailed
measurement of pulleys, taking place under a specific load per belt section).
All "V" and wedge belts are manufactured to the SKF own "MATCHED SET" tolerances when-
ever produced, and stay matched, implying they are installed to the relevant "Installation Ten-
sion" value, using the correct equipment, and that they are fitted in pulley grooves under rea-
It is recommended that new belts should not be mixed with old belts on the same drive. The same is
valid for different constructions and different manufacturers’ brands.
The "matched set bands" work well in practice, provided belts are tensioned to the tension-
ing instructions for the general respective belt section/construction. All belts are actually
manufactured to the branded size plus/minus a set tolerance, which relates to the "matched-
set" tolerance band (most internationally known standards allow a larger deviation from the
branded size to the actual measured length).
SKF Belts* are oil and heat resistant within the properties and capabilities of the "Polychloro-
prene" ("Chloroprene", "Wingprene" and "Neoprene" are other names for the same synthetic
oil derived rubber compound), but the belts are not "fire resistant". Recommended ambient
temperature range is from –30° C to +70° C. Note that belt lifetime will be affected in case
these limits are not respected.
|Main materials used in timing belts: |
|Belts could be stored for 7 (seven) years without affecting expected working life if the storage |
is done in optimum conditions.
|SKF Belts* are branded as shown in below picture:|
|Classical and trapezoidal inch pitch timing pulleys (MXL, XL, L, H, XH, XXH) are manu- |
factured according to ISO 5294.
Metric pitch series timing pulleys (T/AT) are manufactured according to DIN 7721.
All SKF V-belt Pulleys are manufactured to the standards ISO 4183, DIN 2211,
ANSI Narrow V-belt pulley IP-22 and the ANSI Classical V-belt pulley IP-20.
They are interchangeable with type SPA, SPB, SPC and SPZ. The pulleys are made from
cast iron G3000 (GG ) to American standard "SAEJ431AVG96".
All pulleys are statically balanced to 6.3 according to ISO 1940. After balanced the pulleys
are suitable for the linear speed of not more than 35m/sec. Dynamic balancing can be
provided on request. SKF can issue a certificate stating that all pulleys are dynamically
balanced in case of a special customer request.
|SKF Flex-, Chain-, FRC-, Jaw Couplings and Universal Joints are manufactured according |
to established market standards and are fully interchangeable with other brands:
SKF Grid, Gear and Rigid couplings are manufactured according to established industrial standard,
which is acceptable throughout the world.
SKF Gear Couplings are interchangeable, half to half, to industries standard using AGMA bolt
Every coupling is protected by a specific treatment, which depends on the material or type of
packaging: (1) phosphate coating, (2) blackening, (3) spray painting or (4) anti-corrosion oil.
SKF Bushings and Hubs
SKF Taper Bushings, QD Bushings, Weld-on and Bolt-on Hubs are manufactured according
to established market standards and are fully interchangeable with other brands.
Metric bore keyway machined according to BS 4235: Part 1 and DIN 6885.
Imperial bore keyway machined according to BS 46: Part 1.
Last revision: 10.06.2015