Ceramic lagging bonded directly to pulley

(not verified)
Posted in: , on 8. Jul. 2003 - 13:46

I am currently evaluating ceramic lagging for our conveyor drive pulleys.

I understand that ceramic tiles embedded in rubber are commonly used in industry. However bonding the ceramic tiles directly to the steel of the pulley, using epoxy, is a relative new method used more and more.

Is there any documented disadvantages of bonding the ceramic tiles directly to the steel of the pulley(Pulley life, belt life)?

If any, please supply references to these documents.

Re: Ceramic Lagging Bonded Directly To Pulley

Posted on 8. Jul. 2003 - 03:39

The tiles are not bonded by epoxy directly to the pulley steel shell.

Tiles are normally supplied in sheets with a rubber backing and rubber interlaced between tiles. The rubber backing is cold bonded with a chemical that fuses the rubber to steel.

Manufacturers such as: Bellbane, Rema Tip Top, and Richwood have procedures for such. Contact them.

Lawrence Nordell

Coneyor Dynamics, Inc.

Lawrence Nordell Conveyor Dynamics, Inc. website, email & phone contacts: www.conveyor-dynamics.com nordell@conveyor-dynamics.com phone: USA 360-671-2200 fax: USA 360-671-8450

Re: Ceramic Lagging Bonded Directly To Pulley

Posted on 8. Jul. 2003 - 07:38


The industry has gone to ceramic tiles imbedded in rubber for the following reasons:

1) The rubber allows the use of small flat tiles without creating problems on the circumfrence of the pulley.

2) The rubber provides an impact cushion, which helps prevent tile breakage or loss when material gets caught between the pulley and belt.

3) Production costs are lower if the tiles can be cast in sheet rubber pads.

As far as documentation concerning the use of tile directly on the pulley is cincerned, I am not aware of any studies. I can however suggest two potential problems -- cost and service life. The cost to have tile made to fit the individual pulley circumfrences and to glue them in place individually is probably higher than what is acceptable. The service life of the tiles should be lower than that of the rubber backed ones due to the lack of cushioning.

Finally, are you sure that you need ceramic lagging?


Dave Miller ADM Consulting 10668 Newbury Ave., N.W., Uniontown, Ohio 44685 USA Tel: 001 330 265 5881 FAX: 001 330 494 1704 E-mail: admconsulting@cs.com

Ceramic Lagging Tiles

Posted on 27. Jul. 2003 - 06:21

Hi all,

We are finding a growing trend in South Africa, Australia and the U.K to bond ceramic tiles directly to drums with an epoxy adhesive.

Large wearing companies like multotec ( South Africa ) CUMI Wulfenia ( Australia )and Kingfisher ( U.K ) have been pioneering this application.

Our Eli-Bond FR961E1 is now an established product to bond these tiles down.

Basically a strip of back bonded tiles is laid across the drum, and diagonally bonded with a two-part thermoset adhesive ( FR961E1 or similar ). A polyethylene rod ( approx. 25mm diameter ) is laid between the tiles to form a draining channel.

We have found good results with no significant belt wear, slippage or tile loss.

Reason for moving away from ceramic-embedded lagging sheets : poor quality product coming out of India which causes the tiles to " pop " out as the sheet is being bent around the drum.

For more details, please visit :



Aram Friedrich


Re: Ceramic Lagging Bonded Directly To Pulley

Posted on 27. Jul. 2003 - 09:26

Hello Aram,

These have not shown up in the US yet (to my knowledge), probably because the lagging sheets are made properly.

The strip method would get around the application time problem.

I assume that the Eli-Bond FR961E1 has three functions -- bonding; cushioning; and void filling (to allow a flat tile to be bonded to a curved surface).

Is there a reason for applying on an angle, as opposed to transversely?

Regards and keep up the good work.

Dave Miller ADM Consulting 10668 Newbury Ave., N.W., Uniontown, Ohio 44685 USA Tel: 001 330 265 5881 FAX: 001 330 494 1704 E-mail: admconsulting@cs.com
Ken Tuckey
(not verified)

Ceramic Tiles Onto Steel Pulleies

Posted on 30. Jul. 2003 - 08:55

Hi there,

we concur with Elite with whom we developed adhesives which enable us to apply the ceramic pulley lagging directly onto the steel. Our experience has shown that the steel / rubber bond and ceramic / rubber bond is good so that under high shear force conditions, the rubber tears between the ceramic and the steel.

If you contact me we can provide data, pictures and case studies showing why we have successfully converted all our many clients to the ceramic in epoxy systems.

Our website, www.multotec.com shows detail under applications/wear linings/pulley lagging for reference.

looking forward to your reply,



Re: Ceramic Lagging Bonded Directly To Pulley

Posted on 31. Jul. 2003 - 08:24

Hi There..

I have been doing a lot of comparisons with ceramic lagging here in South Africa over the last 6 years on numerous small as well as all of our very large installations.

There can be no doubt from my results, that ceramic tiles of the correct size, bonded with the correct epoxy (very important) directly to the sand or shot blasted steel pulley shell is the only way to go.

We are busy with Part 2 of SABS 1669 (pulleys) which deals with lagging at present.

Please feel free to e-mail me at gspriggs@global.co.za for details of my findings if you like.

Graham Spriggs

Ceramic Tiles Lagging Direct To Steel Shell

Posted on 19. Aug. 2003 - 02:56

Dear Sir,

In normal chute application, the ceramic tiles directly embeded to steel sheets come out due to the poor bonding or practical difficulty in achieving the perfect bonding. For pulleys it may be more difficult than in chute due to the pressure by main belt. Since there is some system supplied we have to see the performance after put into operation for some time.

It appears more difficult to maintain the perfect bonding with direct bonding.



Ken Tuckey
(not verified)

Ceramic Pulley Lagging Bonded Directly To Steel

Posted on 20. Aug. 2003 - 09:30

Hi Mr. Subra,

your response regarding the adhesion between ceramics and steel when applied directly to the steel of a pulley refers. Adhesion has always been a prime concern, and to this end we have developed a special Hi-bond epoxy which, after more than 1000 successful pulley installations, has not yet shown any signs of detachment, PROVIDED THE SURFACE PREPARATION HAS BEEN CORECTLY DONE, AND THE INSTALLATION OF THE EPOXY HAS BEEN CONTROLLED IN WORKSHOP CONDITIONS TO ENSURE CORRECT CURING REGIME'.



Ceramic Tiles Bonding To Steel

Posted on 22. Aug. 2003 - 11:14

Dear Mr Ken,

It is interesting if proven design already available. can we have more details to suggest to our clients?



AE Automotion (M) Sdn.Bhd

10&12 Jalan mas 6, Taman cheras Mas

Cheras 43200 Selangor D.E.


David Beckley
(not verified)

Re: Ceramic Lagging Bonded Directly To Pulley

Posted on 7. Mar. 2004 - 08:52


There is one very important point that must be considered when selecting drive pulley lagging material viz; on a drive pulley there will be a change in tension from the tight side tension T1 to the slack side tension T2. This change in tension will produce a change in belt length and the belt will try to slide (creep) backwards. This problem is more serious with textile reinforced belts due to their low elastic modulus. When ceramic tile lagging is used, the belt cannot slide readily on the tiles due to the mechanical locking between the tiles and the belt and unless they are mounted on a rubber mount that can shear readily to accommodate the change in belt length, very high shear stresses will be developed in the belt bottom cover rubber and in the splice. For this reason I would definitely not use ceramic tiles bonded directly to the steel surface. If you really need to use ceramic lagging, I would look for a product with a very flexible rubber mounting such as Remagrip CK-X.

To support my argument I have seen ceramic tiles torn from a relatively rigid rubber backing by the high shear stresses and I have seen bottom covers torn by the use of this type of lagging. I also believe that the use of ceramic lagging, on conveyors fitted with textile reinforced belts, can lead to splice failure.

If you can get away with rubber lagging, it is my preferred option. look for a product that has transverse grooves as well as a diamond pattern, the transverse grooves will help absorb belt length change and reduce wear due to creep. Belle Banne produce an excellent rubber lagging of this type.


David Beckley,

Conveyor Design Consultants of WA

Perth, Western Australia.

Re: Ceramic Lagging Bonded Directly To Pulley

Posted on 9. Mar. 2004 - 08:28

Does anyone have info on what this does to coefficient of friction between the belt and the ceramic lagging as discussed when applied to drive pulleys?

Larry J. Goldbeck Martin Engineering
(not verified)

Ceramic Lagging

Posted on 10. Mar. 2004 - 08:45

We do several pulleys a month lined with rubber with ceramic tyles, results are excellent, specially in high tension Steel Cord conveyor belts with high humidity and abrasive copper ore.

Our experience with pulleys lagged direct on steel has been a lot of material built up on the pulley due to lack of elasticity, then the conveyor is out of alignment and in some case destroyed mainly the splices

Re: Ceramic Lagging Bonded Directly To Pulley

Posted on 23. Mar. 2004 - 04:40

Dear all,

This reply is not for the purpose of joining in the ongoing discussion on ceramic pulley lagging. As an Indian and being in the ceramic wear resistant applications in the last 10 years, I take offence in the statement by Mr.A.J.Fredriech of Elichem saying "the poor quality ceramic lagging out of India". Such blanket statements admonishing products out of a particular country is unwarranted and calls for immediate retraction and apology. Understand these forums can be used for marketing products from the members' company but this should be done sensibly.