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Frequently Asked Questions: Answers:
1
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 60068-2-75:2014.
 
It is made from Steel, Brass, Nylon, Neoprene & Traffalite. Finishes are chrome & zinc. Components are manufactured, assembled by us and calibrated 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.
2
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
3
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 6008-2-75:2014
4
QUESTION TO CUSTOMER:
What international standard applies and what Impact Energy in Newton Metres or Joules (Nm/J) do you need to test for?
Lansbury International manufacture single value impact test hammers, which are UK factory set to any impact within the instrument range 0.2Nm(J) - 1.0Nm(J).
 
We only supply single setting hammers. 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.
We also offer an attractive discount on order quantities over 3 Hammers.
5
What is the Warranty Period for a new Spring Hammer?
12 months for Lansbury International products
 
6
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.
7
What is the recommended calibration interval?
We recommend 12 Months calibration interval
8
Can we measure the Impact ourselves?
No, not with 20 years of UKAS traceability
9
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
10
Are dimensional and weight checks performed during Calibration?
Yes, we check dimensions and weights of sub-assemblies for Lansbury Hammers, but not all component details are recorded
11
Are you a BSi member?
Yes, BSi membership number 41110550
12
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.
13
What laboratory standards do Lansbury International operate to?
IS0/IEC 17025:2005 General Requirements for the competence of testing and calibration laboratories
14
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
15
What is your Accreditation Number?
UKAS Calibration 0328
16
Do you have a Quality Manual?
Can we see a copy?
Yes, we have a Quality Manual
No, it won’t do you any good
17
What is the Rockwell Hardness of the Hammer Head material?
Can you show Traceability for the Rockwell Hardness?
The Nominal Rockwell Hardness of the Polyamide head is HRR 100 (Rockwell R scale)
All the polyamide material for the hammers striking head is from a certificated batch with full traceability from our suppliers. No individual Certificates are available.
17a What is the radius of the hammer head?
What is the mass of the striking element?
What is the mass of the body assembly?
What is the mass of the cone unit?
The hammer head is CNC manufactured 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.
18
Is there a quantity discount for new Hammers?
Yes, 5% discount for 3 or 4 new hammers and 10% for quantity 5-9 new hammers
19
What is the Delivery time for New Hammers?
3 - 4 weeks on average, excluding overseas carriage
20
What is the turn around time for recalibration?
2 - 3 weeks, excluding overseas carriage. Please contact us for pre-booking calibration slots. We cannot guarantee to turnround hammers quickly if they arrive "out of the blue"... Please call us first!
21
Do you close for Summer/Christmas Holidays?
2 weeks during summer and Christmas and New Year holidays. We do need a holiday sometimes...
22
Why do we have to pay against Pro-forma invoice for new Hammers?
Payment is required before equipment is despatched
23
Why are invoices issued by Lansbury International but payment due to Control Plant Ltd? 
we are Control Plant Limited trading as Lansbury International
 
24
What is your UK VAT registration number?
GB 347 3541 51
25
What are your bank details for invoice payment?
Please contact our office for bank transfer details
26
What are the charges for delivery?
Please enquire via email form as these vary between countries
27
Do you offer demonstrations?
No, because every product test would be slightly different
28
Do you Hire/Loan Spring Impact hammers?
No, unfortunately it is not feasible for us
29
How long has Lansbury International been making and Calibrating Spring Impact Hammers?
Well over 30 years, on the same site in Woking
30
Which major international organisations do you supply?
This is a small sample from thousands of our customers:
AMP Inc
BSi Testing
Canadian Standards Association
Dimplex (UK) Ltd
ERA Technology Ltd
Fluke UK Ltd
General Electric (USA)
Hewlett-Packard Co
Indian Standards Institution
JVC (UK) Ltd
Kingfisher Asia Ltd
LEC Refrigeration Plc
Mitsubishi
National Panasonic (UK) Ltd
Osram (GEC) Ltd
Philips Consumer Electronics B.V.
QA Testing Centre Ltd
RS Components Ltd
Sri Lanka Institute of Scientific Industrial Research
Testing Certification Australia
Underwriters Laboratories (UL International)
Valor Heating Ltd
W.H. Smith Sons (Tools) Ltd
Xerox Corporation
York EMC Services Ltd
Zannussi Elettrodomestici
 
 
 
Lansbury International, the spring impact test hammer manufacturer in the UK
Quality calibration of impact test hammers since 1980