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tenditori automatici per catene e cinghie

TENSIONER ETH1 KU with self lubricating sliding bushes and fork

TENSIONER ETH1 KU with self lubricating sliding bushes and fork
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from €34.90
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Description

ETH1 KU with fork (PTFE bushes), automatic device linear spring-action drive tensioner consisting of a base in a very sturdy antiseize aluminium alloy with tensile strength of 440MPa that ensures perfect glide on high tensile strength galvanized steel rods, to which  U-shaped bracket in galvanized steel is fastened, where it is possible to install various accessories.Particularly useful when operating at high temperatures.

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Download Cad
 pdf 3D File
codice 3D&2D NEWTON FORK Price Shipping
ETH1SKU 3Dstep
3Dsat
3Dx_t
2Ddwg
2D
dxf
130-250 26,2

Min_1_Quantity

Goods on stock
Delivery_12hours

ETH1DKU 3Dstep
3Dsat
3Dx_t
2Ddwg
2D
dxf
130-250 34

Min_1_Quantity

Goods on stock
Delivery_12hours

ETH1PKU 3Dstep
3Dsat
3Dx_t
2Ddwg
2D
dxf
130-250 62

Min_1_Quantity

Goods on stock
Delivery_12hours

ETH1S85KU 3Dstep
3Dsat
3Dx_t
2Ddwg
2D
dxf
40-85 26,2

Min_1_Quantity

Goods on stock
Delivery_12hours

ETH1D85KU 3Dstep
3Dsat
3Dx_t
2Ddwg
2D
dxf
40-85 34

Min_1_Quantity

Goods on stock
Delivery_12hours

ETH1P85KU 3Dstep
3Dsat
3Dx_t
2Ddwg
2D
dxf
40-85 62

Min_1_Quantity

Goods on stock
Delivery_12hours

ETH1S190KU 3Dstep
3Dsat
3Dx_t
2Ddwg
2D
dxf
95-190 26,2

Min_1_Quantity

Goods on stock
Delivery_12hours

ETH1D190KU 3Dstep
3Dsat
3Dx_t
2Ddwg
2D
dxf
95-190 34

Min_1_Quantity

Goods on stock
Delivery_12hours

ETH1P190KU 3Dstep
3Dsat
3Dx_t
2Ddwg
2D
dxf
95-190 62

Min_1_Quantity

Goods on stock
Delivery_12hours

 Spare Parts & Accessories

  1. 1
    BRACKETS FOR LINEAR TENSIONERS
    Our ABS brackets are a good support for our tensioners. They are available with screws to set up the tensioner in the right way.They are made of zinc-coated steel, their shape blocks twisting so the tensioner keeps the right position .
  2. 2
    PRELOAD BRACKET FOR LINEAR TIGHTENERS
    PRELOAD BRACKET FOR LINEAR TIGHTENERS. For all linear tensioners. Galvanized steel.
  3. 3
    Linear tensioner preloading block
    Linear tensioner preloading block. (galvanized steel) For ali linear tensioners

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  2. 2
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INFO KU

AUTOMATIC CHAIN AND BELT TENSIONERS

LINEAR - AXIAL 

Our TO, TA and ET series of linear tensioners were designed in 1979 and patented in 1981. We were the first in the world to manufacture linear chain tensioners which used bolts, third in the world and first in Italy to manufacture and design automatic tensioners in general.

Initially designed with an aluminium body equipped with bushes for the bolts, they were then modified using die cast technology. In fact, there is no longer the need to use sliding bushes. The bodies are made of a special mixture of alloys, not only light alloys.

This alloy is heavier thus giving a more robust structure which can better withstand temperatures, creating as little displacement as possible from its tolerances. They are also anti-seize so that internal bolts can slide perfectly; in fact, the clearance in the bolts is reduced to 0,05:0,13 m/m and all our castings are machined using our own CNCs.

These tensioners are also available in a KU version with self-lubricating sliding bushes; the bodies are made of light alloy and not purely aluminium. We have learnt from experience that aluminium has some displacement due to temperature changes which can, in time, lead to problems with the tolerances of the bushes themselves. We have assured the mechanical hold of the bushes by using this mixture together with specific manufacturing techniques using our CNC machinery. The clearance of the bolts falls between 0,02:0,05 m/m. 

Why and when to use these bushes?

They are used very rarely; usually in belt tensioners where the belts turn at high speed and there is the need to dampen frequencies on return or long sections, for example, printing machines, etc.

Or when there is the need to mount an automatic tensioner in a position which is difficult to access by the operator.

Note that in all cases of sliding bolts, a minimum amount of grease needs to be applied, either before mounting or after pro-loading, just as the bolts need to be greased over the life of the machine during its normal maintenance. 

In most cases, it is better to use the model without the bushes which we recommend.  In fact, where there is a need to quickly retrieve the pre-load point (for example, the start of a transmission without a deceleration or acceleration ramp) where the automatic tensioner must be able to quickly retrieve the starting point, and sliding bushes, which decrease clearance on the bolts, are not always the right choice…

Or, it may not be opportune to use them where there is too much moisture or the formation of condensation; in this case we suggest you look at our NT model. 

Our NT series automatic chain tensioner was designed in around 2000 and patented in 2001.

It was designed to meet the requirement for a completely closed automatic chain tensioner, to prevent infiltrations (dust from cement, ceramics, dust, sugar, flour, etc.).

Given the experience gained from our earlier models and to maintain sustainable production costs, we designed the product in aluminium and the self-lubricating sliding bushes in plastic, thus allowing the aluminium of the body to displace depending on the temperature but not to affect the sliding action of the bolts. In fact, the bushes are blocked for interference and also have a specifically-designed locking pin so as not to lose tolerances (we know that plastic materials move through humidity present in the air).  The clearance on the pins is between 0,06:0,16 m/m.

The heart of a machine is its transmission; to protect it, we offer the best quality Made in Italy products. 

If you would like further information about our products, please contact us and we will be pleased to advise you on the right product to suit your applications.