Spring Hammer Calibration FAQ

Frequently Asked Questions:

Answers:

	Spring Impact Test Hammer
	Requirements & Standards
	Calibration
>	Frequently Asked Questions
	Contact details

What is a Spring Impact Test Hammer?
and what is it used for?

A Spring Operated Impact Test Hammer is an instrument which delivers a precise impact energy for product testing purposes.
It is specified in British & International Standards BS EN 60068-2-75:1997 and BS EN/IEC 60068-2-75:2014

It is made from Steel, Brass, Nylon, Neoprene & Traffalite. Finishes are chrome & zinc. Components are manufactured and assembled in the UK.

The Spring Hammer is used by Testing Organisations and Manufacturers to test the impact resistance of their products, as required by product safety standards. It is widely used by companies making electrical or electronic equipment and domestic products.

How is it used?

The International standard or requirement document that calls for the use of a Spring Impact Hammer will usually detail the procedure to follow for the testing of the products in question. See IK ratings below.

What British, European and International standards apply to Spring Hammers?

In terms of manufacture and calibration, the following standards are of note:
IEC 817:1984
BS 7003:1988
IEC 68-2-63:1991
BS EN 60068-2-63:1995
BS EN 60068-2-75:1997
IEC 60068-2-75:1997
BS EN 60068-2-75:2014
IEC 60068-2-75:2014
The Calibration procedure is by means of a pendulum comparator, with impact values from 0.2 J(Nm) to 1.0 J(Nm)
Measurement tools are calibrated by accredited external facilities.

QUESTION TO CUSTOMER:
What IK rating or international standard applies and what Impact Energy in Newton Metres or Joules (Nm/J) do you need to test for?

Lansbury International manufactured single value impact test hammers,
which were factory set to any standard impact within the instrument range (0.2Nm - 1.0Nm).

If there is a requirement for different impact energies, there are advantages in having a collection of single setting hammers, which include being able to test more than one product type at a time. The calibration turn round time is also considerably less for a single setting hammer, which means the equipment is out of the clients test lab for less time.

If you are only sending one hammer away for calibration at a time, you can continue testing with the other value hammers, which means less disruption for your test laboratory.

IK01

IK02

IK03

IK04

IK05

IK06

0.14J

0.2J

0.35J

0.5J

0.7J

1.0J

What is the Warranty Period for a Spring Hammer?

Usually 12 months, please check.

How long is the Certificate valid?

The official UKAS answer is that the paper ‘Certificate’ is valid indefinitely, however, the calibration validity is another matter.

What is the recommended calibration interval?

We recommend 12 Months calibration interval

Can we measure the Impact ourselves?

No, not with UKAS traceability

Can we have a Certificate issued with a longer “due date” e.g. 2 years or 5 years?

Although we recommend 12 months calibration interval (and that is what was originally specified in the first standard), UKAS will not allow us to impose a time limit, stating that it is up to the Customer to determine, through usage and other factors, how often the spring hammer should be calibrated – bearing in mind this limitation, we do not specify a “Calibration Due Date” on the certificates

Are dimensional and weight checks performed prior to Calibration?

Yes, we check dimensions and weights of sub-assemblies for Lansbury Hammers, but not all component details are recorded

BSi member?

N/A

What is the use of the UKAS accredited traceable Calibration Certificate?

Usually the reason for getting something independently evaluated is to confirm it meets specific requirements in order to reduce risks. Accreditation by UKAS means that evaluators, including testing and calibration laboratories, have been assessed against internationally recognised standards to demonstrate their competence, impartiality and performance capability.
UKAS accreditation means the evaluator can show to its customer that it has been successful at meeting the requirements of international accreditation standards.

What laboratory standards do we operate to?

BS EN IS0/IEC 17025:2017 General Requirements for the competence of testing and calibration laboratories

Are you an accredited laboratory?
traceable to National Standards?

Yes, we are accredited by UKAS for calibration work.
All relevant measurements are traceable to National and International standards

What is your Accreditation Number?

UKAS Calibration pending for spring hammers

Do you have a Quality Manual?

Yes, we have a Quality Manual based on BS EN ISO/IEC 17025:2017

What is the Rockwell Hardness of the Hammer Head material?
Can you show Traceability for the Rockwell Hardness?

The Nominal Rockwell Hardness of the hammer head is HRR 100 (Rockwell R scale).
All the new material for the hammer's striking head is from a certificated batch with full traceability within HRR 85 - 100 from suppliers.
No individual Certificates are available.

What is the nominal radius of the hammer head?
What is the nominal mass of the striking element?
What is the nominal mass of the body assembly?
What is the nominal mass of the cone unit?

The hammer head is machined to have a spherical radius of 10mm.
The mass of the hammer assembly striking element is 250gm +/- 1gm.
The mass of the body assembly is 1,250 gm.
The cone has a mass of 60 gm.

What is the Delivery time?

Please call

What is the turn around time for recalibration?

Please call us first!

Do you close for Summer/Christmas Holidays?

Please call

Do we have to pay against Pro-forma invoice?

Please call

What is your UK VAT registration number?

Please contact our office for details

What are your bank details for invoice payment?

Please contact our office for bank transfer details

What are the charges for delivery?

Please contact our office for details

What is the Commodity Code?

The Customs Commodity Code for Spring Hammers is: 90 24 80 00

Do you Hire/Loan Spring Impact hammers?

N/A