lehmann rotary table supplier

* pL SOLUTIONS Shanghai Co. Ltd is part of a network of locally owned, independent representatives and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS India/SEAis part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS Italia is part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS Japan is part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS USAis part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS India/SEA is part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS USA is part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS India/SEAis part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS South Korea is part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS India/SEA is part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS USAis part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

* pL SOLUTIONS India/SEAis part of a network of locally owned, independent distributors and service specialists dedicated exclusively to the sales, service, and support of CNC rotary tables designed and manufactured by the Swiss firm Peter Lehmann AG (pL)

The robust geared rotary tables of the 500 series are extremely flexible to use and, thanks to the combiFLEX® modular system, can be converted or extended at any time to meet new machining tasks. The rotary tables are not only suitable for positioning operation, but can also be used for short simultaneous machining operations. The preloaded gear and the powerful bearings allow high long-term accuracies as well as large spindle loads. The maximum clamping force of up to 7,000 Nm leaves hardly anything to be desired.

The Lehmann EA-507 is the smallest device in the range with a centre height of 110mm and a spindle nose of the 70mm which can accept a whole host of accessories directly and is supplied as standard with a HSK-A63 spindle arrangement. There are options of increased precision gear versions, raised centre height to 150mm, chucking options and rotary couplings to meet any demand, so please contact our technical sales department to discuss your exact requirements. This device in the first instance is a vertical and horizontal device with the motor mounted to the left hand side (right hand motor mount option is available) there is no rear mount motor option currently available on this device. An excellent carrying capacity of 120kg vertically and 240kg between centres and speeds up to 120rpm dependent on motor selection. The Lehmann EA-507. L CNC rotary table without motor, can be prepared to suit any interface at additional cost (see our interface listings for details and costs for “external interface” which includes motor, switch, cable and connector requirements (if you already have a “4th axis interface” in the machine) ;and machine interface costs (if you do not have the additional axis fitted). Motor is mounted to the left hand side on this device and therefore may restrict the Y axis capability in certain circumstances. The spindle diameter is 70mm and there is a centre hole location of 46. 55mm over a length of around 75mm and a 31mm through bore is available should you want to machine long bar components that need to be mounted right through the centre of the unit. The Lehmann products now come fitted, as standard, with their own “Lehmann blackBOX” which allows for instant user monitoring of the device, showing the status of all switches, valves, the 24V supply condition, a service light showing when the device requires a service. In addition, remote monitoring is also possible via a USB connection. The Lehmann devices are modular and can therefore be constructed as multi-spindle devices or built into 5 axis assemblies in various configurations.

pL LEHMANN has been developing and producing CNC rotary tables for over 40 years. – genuine SWISS QUALITY. The experience gained is incorporated into our products and services. With innovative CNC rotary axes, organized in a standard modular system, we want to meet the international needs for economical production of very small to medium-sized workpieces in the machining industry by satisfying individual requirements with appropriate combinations.

The Lehmann product line also offers a wide range of workpiece clamping options, including options for fully automatic loading and unloading by robots. The comprehensive range is divided into geared and direct drive rotary tables and offers numerous possibilities thanks to the use of a flexible modular system.

Making a MACH 2022 debut, on the pL Lehmann stand will be the company’s advanced 900 series. The powerful new range of versatile, direct drive rotary tables are particularly suitable for HSC milling, mill-turn machining, modern hobbing (power skiving) or even demanding grinding operations.

The tables are able to transform simple 3-axis milling centres into multi-functional 5-axis machines. The 900 DD series’ durable housing is fully sealed to IP 67 and able to withstand rotations of over 2,000rpm without a problem.

In response to situations such as emergency stops or power failures, a specially developed 900 DD fail safe system brakes the spindle to zero within a very short time without damaging the rotary table.

Word soon spread within the F1 community regarding CNC Techniques range of capabilities and Mr Eden’s fledgling business quickly established a loyal customer base. The mainstays of CNC Techniques machining capabilities are its high-performance Hurco 3-axis and 5-axis machine tools. To provide an additional 2-axes to the company’s 3-axis machines and to add greater machining flexibility, CNC Techniques recently invested in a rotary table solution from Lehmann.

“Although we are kept busy throughout the year, our workload more than doubles in the traditionally busy F1 months of December through to February. Therefore, at this time of year, apart from working around the clock, we need to work smarter and employ equipment that provides greater flexibility. The need for machining flexibility and the requirement for an additional 2-axes on our Hurco VMX 30, 3-axis machining centre, were the major motivations behind the recent rotary table purchase.

“Even though I was aware of the excellent reputation of Lehmann products, I was open to the idea of purchasing alternative brands of rotary tables. Although, when compared to the indifferent response I received when I contacted some other manufacturers, the reaction I had from Lehmann was first-class. All of my questions were answered quickly and several constructive suggestions were made by the company’s technical staff.

“In addition to giving us the ability to achieve five-sided machining in a single setup, I was assured that a Lehmann rotary table would withstand the high forces involved in machining exotics and also deliver the standards of precision we need.

“The installation of the rotary table was carried-out by a couple of knowledgeable technicians who made all of the connections to our Hurco VMX 30 3-axis machine tool’s control system,” he adds.

“Then, whilst observing the rotary table’s try out I realised how easy it was to operate. We now use the rotary table along with our Lang Technik workholding. In addition to standing up to the machining forces used to machine exotics, the rotary table is simple and fast to operate and is making a significant contribution to our 3+2 axis machining capabilities.”

Increasingly, users of 3-axis VMCs are fitting Lehmann CNC rotary tables to their machines as they represent a cost-effective means of entry into 5-axis machining. When mounted in a VMC, the tables are able to deliver a tilting A-axis and/or a rotational C-axis.

Given the compact nature of Lehmann CNC rotary tables, they allow workholding devices to be located alongside them inside VMCs. If required they are able to remain in the machine, or they can be quickly removed and later replaced according to the machining jobs being carried-out.

By locating workholding beside the a compact Lehmann rotary table, a virtual 6-axis condition can be achieved. For example, following the five-sided machining of a workpiece held on the rotary table, without a break, machining can be undertaken on the next workpiece in a batch that is held in the neighbouring workholding.

As floor space is at a premium in most machining environments, mounting a CNC rotary table inside an existing 3-axis VMCs provides a major advantage over purchasing a large 5-axis machine tool. In addition, the cost of the table is a mere fraction that of an expensive new machine tool

Lehmann has been designing and manufacturing high-quality rotary tables for more than 40 years. The experience and expertise gained over this time is reflected in the quality of the company’s advanced products and in its exemplary levels of service.

To minimise parts and to enable the delivery of Swiss quality at a cost-effective price, Lehmann rotary tables are based on an innovative, standard modular system. This highly efficient approach allows a wide range of CNC rotary table options to be made available to meet all customers’ diverse needs.

Customers fundamentally expect high precision and quality from Swiss machining service providers. To be able to meet these expectations at marketable prices, service providers need not only machining know-how but high-performance machinery as well. Appenzell-based AITech AG reveals how, together with suppliers pL LEHMANN and Schunk, it has turned a three-axis DMG standard machining center into a «marvel» of flexibility that reduces tooling times to the absolute minimum too.

To that end, AITech employs two horizontal 4-axis machining centers automated with pallet systems. When, in 2020, two vertical milling machines had reached the end of their useful life and had to be replaced, Bösch wanted to see multi-point clamping and complete machining implemented here as well. He envisioned a three-axis vertical milling machine equipped with an additional rotary axis: «Because the four axes allow us to machine workpieces on five sides, and even clamp round parts and machine their lateral surface at the same time where necessary.»

So Bösch and his milling technology team decided to invest in a DMG MORI CMX 1100V. The three-axis drilling-milling center offers high stability and good accessibility thanks to its C-frame concept. The high degree of precision required is guaranteed, among other things, by a direct displacement measurement system; the positioning accuracy is 6 µm on all axes. «The large machining range is also important for us, especially the X travel of 1100 mm,» emphasizes Thomas Bösch. «Although we very rarely have workpieces that long, this allows us to set up an additional rotary table in the work area and install even more vises or special fixtures for multi-point clamping next to it,» he says, explaining his basic idea.

First and foremost, the precision machinists wanted their new milling center to be completely flexibility in terms of component diversity. The idea was to reach this goal by means of an integrated CNC rotary table and flexible clamping technology. When it came to the rotary table supplier, there was only one choice for AITech – pL LEHMANN from the Swiss town of Bärau. Thomas Bösch had worked with products from this rotary table specialist in the past, experiencing only the best in terms of quality and precision. The preferred supplier for the clamping systems was Schunk. The background: AITech has always purchased its vises from Gressel AG, which has been part of Schunk GmbH & Co. KG from Lauffen, Neckar since 2014. In Switzerland, the two clamping technology specialists work closely together at the Aadorf site.

pL LEHMANN and Schunk gathered at AITech to collect and evaluate ideas and ultimately develop a concept to guarantee the shortest possible tooling times and maximum flexibility.

The details were discussed there and then. The pL sales manager for Switzerland suggested the EA-520.L-M1 rotary table version, a model that perfectly matches the machine and the intended machining spectrum in terms of drive power, clamping forces and precision. The pL rotary table needed to operate as a separate axis when required, but also together with a bridge plate or a tailstock. Not a problem for pL LEHMANN. The product range includes standard additions such as rotoFIX bridge plates and the longFLEX tailstock. However, the company is also open to special requests: pL LEHMANN offered to make the tailstock movable, and did in fact do so.

Point 1: The EA-520 pL rotary table is attached to the machine table by two Gressel gredoc zero-point clamps. If needs be, it can be completely removed in less than 15 minutes and reinstalled without lengthy calibration procedures. «This doesn’t happen too often,» admits Ettemeyer, «because we positioned it at the very edge of the table, beyond the traversing range of the X-axis. As a result, it leaves enough space for several vises or fixtures for multi-point clamping and can remain on the machine most of the time, even when it is not needed.» That said, the rotary table did have to be removed several times last year. According to Ettemeyer, this made the relatively small additional financial outlay for the zero-point clamps worthwhile.

omationPoint 2: The vises, multi-point clamping devices, counter bearings and tailstock are also fixed to the machine table with a zero-point clamping system. The choice fell on a VERO-S eight-point clamping station from Schunk. The pneumatic system proposed by the regional sales manager of the Swiss sales office SCHUNK Intec AG appeared to be the best solution for all parties involved.

This is a spring-loaded system, opened pneumatically at an actuating pressure of 6 bar. The clamping station is suitable for holding all common clamping pallets as well as clamping devices with the associated gage. Because AITech also wanted to keep the automation facilities flexible, Schunk met the special request of controlling the chucks in pairs, as opposed to the standard version of using a single cable to control the overall system.

The fact that a total of two different zero-point clamping systems were selected is down to the diverse requirements to be met. The clamping of the pL LEHMANN axis on the machine table mentioned above can easily be handled by the gredoc mechanical zero-point clamping system, a system set apart by low overall dimensions, high precision and a very good price-performance ratio. Besides the gredoc double clamp for mounting on the machine table, AITech uses a single clamp of the same model for the spindle of the pL LEHMANN rotary table. With its 20 kN of pull-in force, this zero-point clamp is the perfect solutions for such applications. It allows machine operators to interchange a three-jaw chuck with the adapter flange for the rotoFIX bridge plate and vice versa in no time at all.

This QR code can be used to call up an animated graphic showing the flexible use of the EA-520 pL rotary table in combination with zero-point clamping systems.

… the Swiss manufacturer of CNC rotary tables and other components for metal machining, is an experienced machine construction company, whose rotary and swivel axes have proven their worth in production for over 40 years. In addition to these products, which often make three-axis drilling and milling machines into more productive four- or five-axis machining centers, you can also find a variety of workpiece clamping systems in the product line.

Founded in 1960 strictly as a contract manufacturer, pL LEHMANN has been developing and producing CNC rotary tables for over 40 years. With innovations and Swiss quality, the family-owned company in the Swiss town of Bärau (Emmental) succeeded in opening up new opportunities for its customers and developing lean machining solutions characterized by high productivity through use of additional NC axes. One of the highlights of the company’s history is the powerful and flexible Series 500 – developed in 2009 – which is ideal for the most demanding tasks thanks to its modular design. With the backlash-free, preloaded PGD gear unit – developed in 2014 – pL LEHMANN reached another milestone. In 2017, the company introduced, among other things, the new pL-iBox generation, making their rotary tables ready for Industry 4.0 and digital production. This was followed in 2019 by the introduction of the Series 900 DD (Direct Drive) rotary tables with speeds of up to 5,450 rpm. As an additional new product, the AM-LOCK system, a special zero-point clamping system for 3-D printing, including preprocessing and postprocessing, was presented for the first time in 2019.

The key to high flexibility and shorter tooling times: the pL LEHMANN EA-520 CNC rotary table mounted on the far right edge of the machine table (shown here with rotoFIX bridge plate), combined with zero-point clamping systems from Schunk and Gressel.

New at AITech: the DMG MORI CMX 1100V three-axis drilling-milling center, upgraded by the pL LEHMANN EA-520 CNC rotary table and a broad range of accessories (in the foreground, the movable tailstock, the adapter flange for the bridge plate, its counter bearings and the three-jaw chuck that can be mounted via the gredoc zero-point clamping system).

Thanks to the large machining range (X-travel of 1100 mm), the pneumatically releasable eight-point clamping system VERO-S from Schunk can be mounted next to the pL rotary table. This prepares the machine for robot loading.

With its 20 kN of pull-in force, the gredoc zero point clamp is perfectly suited to the rotary table spindle – shown here with clamped adapter flange for the rotoFIX bridge plate. A quick changeover to the three-jaw chuck is guaranteed.

The pL rotary table EA-520.L-M1 is a perfect match for the machine in terms of drive power, clamping forces and precision. It also allows heavier machining operations.

The longFLEX tailstock supplied by pL LEHMANN is placed on the VERO-S zero-point clamping system. In order to adjust the position to the length of the component to be supported, it was designed to be movable.

The spindle of the pL rotary table EA-520 is equipped with a gredoc zero-point clamping system, into which the three-jaw chuck shown can be inserted in the shortest possible time.