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Supplying many of the leading manufacturers of automated devices for industrial, medical, scientific and semi-conductor manufacturing industries the precision cold rolled product through excellent product knowledge. Working closely with engineers to develop custom drive assemblies that meet exact specifications and budget.
ABSSAC offers a complete range of thread forms including acme, stub acme, 60° V, J-form, trapezoidal and multi start high helix variants. Predominantly using a unique thread-rolling process, the cold forming thread rolling combines accuracy and superior surface finish with high strength. The cold rolled forming process delivers a cost effective alternative to traditionally cut or ground thread products. Combine these screw product advantages with a superb range of lead screw nut designs and you have a winning formula.
Precision lead screws and nuts are integral to numerous mechanical processes around the world. Offering a high mechanical advantage they are utilised to efficiently convert an applied torque, to either the nut or screw, into a precise repeatable linear movement. Thread forms such as Acme, Trapezoidal and Vee thread have all been employed over the years, each of which have their definitive advantages over the other. However choosing the correct lead screw assembly for the application can be a challenge. At Abssac we like to look at the basics of the application and understand the speed, load and repeatable accuracy, which can often quickly determine the screw format for the application. For example, the torque required to move a load can be calculated by "unwrapping" one revolution of a thread. Mechanical efficiencies for lead screws range from 20% - 40% depending upon the lead angle and the coefficient of friction of the nut material. For example, Plastic acme nuts offer approximately 10% - 20% better efficiency than bronze acme nuts. The product program delivers an unparalleled quality product supported by many years of application knowledge, experience and range of thread forms.
Acme Lead Screws
Precision rolled ACME threads have a 2G & 3G thread fit. The lead accuracy over the length of the rod is 0.006inch per foot. (0.15mm per 300mm)
Trapezoidal Lead Screws
Precision rolled TRAPEZOIDAL threads have a 7E thread fit. The lead accuracy over the length of the rod is 0.08mm per 30cm.
Metric M Lead Screws
Precision rolled METRIC M threads have a 4G thread fit. The lead accuracy over the length of the rod is 0.08mm per 30cm.
High Helix Lead Screws
The revolutionary high helix multi-start lead screws can offer leads of up to 6 x the diameter of the screw. This multi-start lead screw product provides high linear nut speeds from low rotational screw speeds. Aimed at replacing timing belt mechanisms or executing fast and reliable linear motion the efficient conversation of linear to rotary movement makes this unique product usable in many applications. Formed by the cold rolled forming process, the screws are proving to be a superb economical solution for high speed linear applications.
Unified National Lead Screws
Precision rolled UN V threads have a 2A and 3A thread fit. The lead accuracy over the length of the rod is 0.003inch per foot (0.07mm per 300mm)
The following additional product enhancements can be incorporated into this quality product. Dependant on application requirement, the Noll product can offer a level of product knowledge placement which is unparalleled in the industry.
Teflon coating (Xylon 10-10) is an option on all of the precision produced screws.
Benefits of Teflon Coating are many. Reduces friction. Reduces noise on coarse pitches at high speeds. Enhances performance of Turcite X polymer nuts. Wear resistant even under extreme conditions. Weather resistant against sunlight, saltwater, and road chemicals. Allows wide operating temperature range from -250 to +285 C.
Passivation is an option on all of the precision produced screws
Generally speaking, passivation is the process of making a material passive or inert in relation to another material prior to using the materials together. The primary purpose of passivation for leadscrews is to remove surface contamination such as iron particles that can foster rust and corrosion. The thread rolling dies and cutting tools can impart these contaminants and should be removed for optimal longevity and service life of your leadscrews. Passivation Benefits includes
Maximizing corrosion resistance, dissolving contaminates from metals. and enhancing the surface appearance. The process can also removes impregnated metals out of thread form.
Electropolishing is an option on all of the precision produced screws
Electropolishing, sometimes called reverse electroplating, prepares metals for plating, anodizing or conversion coating and improves surfaces for use in sterilization. The metal work piece is immersed in a temperature controlled bath of electrolyte and connected to the positive terminal (anode) of a DC power supply. The negative terminal is attached to a cathode to which the particles removed from the anode (the work piece) are attracted when electric current is applied. Often, the size, position and distance of the cathode to the work piece is controlled during the process in order to achieve the desired level of polish and to localize areas of polish. Electropolishing Benefits include, an improved appearance and reflectivity as well as an improved resistance to corrosion. The process can also be used prepare metals for plating, anodizing or conversion coating as well as the removal of edge burrs produced by mechanical cutting tools. Importantly the process removes the stressed and disturbed layer of surface metal caused by cutting, shearing, and tearing action of mechanical stock removal and abrasive finishing. Other advantages include the removal of excess material as desired for milling metal parts. Lastly the process vastly Improves surfaces for use in sterilization in the pharmaceutical industry, surgical equipment, dairy and food handling equipment.
Multiple Piece Lead Screws – Product designs that comprise several components.
Multiple Component Lead Nuts – Custom drive nut assemblies in plastics or metals.
Cross and End Pins
Press and Slip Fits
Hand Fitting and Lapping
Thread Locker Application
Sealing and Packaging
Custom Leadscrew features supplied in the past have included
Snap Ring Grooves
E Clip Grooves
Full Radius Ends
Custom Lead Screws
Abssac is in the unique position of being able to research and develop special types of thread forms that meet your exact requirements. We are capable of making tooling if a special thread form with a specific lead (or pitch) if required. We are also capable of assisting you with a leadscrew assembly design and provide first article inspection for your approval. Abssac’s engineering staff will provide you with important concepts to optimise the design phase of your product. We offer a Precision thread rolling service. If our standard thread styles and forms do not quite fit what you are looking for, we can provide a thread form that exactly fits your specification. Most common thread forms are the acme or trapezoidal but Abssac can also supply multi-start or special thread profile requirements. The engineering department welcomes enquiries for special and exotic thread forms can provide first article inspection certification if required.
Special nut designs
When you want a more sophisticated nut design the chances are the part has more importance in the workings of the machine. By supplying both the screw and nut from the one source, Abssac Limited can eliminate this area of potential trouble. The designer can also utilise the experience of Abssac's engineers to incorporate many features into the nut design in complete confidence. To date many bespoke nut designs have been supplied, including optical mounts, cams, external threads, mounting holes, pulley grooves, tangs and linear guides to name a few. Lead screw sizes range from 1mm diameter up to 100mm with a wide range of both metric and imperial leads per diameter. Nuts can be manufactured in just about any machinable material including Bronze, steels and advanced plastics such as Delrin, PTFE or Turcite. We have recently supplied a bespoke nut design for an engraving machine manufacturer who required a Turcite nut design to incorporate a square rigid body, 6 locating holes of differing diameter and a linear guide slot on the traversing head.
ABSSAC is well known for its quality power screws ranging from about 16mm up to 200mm in diameter, but an often little known side of the company is its capability to supply precision miniature cold rolled formed lead screws and nuts. When dealing with screw diameters from 2mm up to 6mm the key is in the manufacturing technique to ensure thread integrity and lead accuracy. Applications are numerous and Abssac has found its products being supplied to different markets such as medical, defence and robotics around the world. In each case, whether it is a single start or multi helix thread form, linear run out and concentricity of the thread is maintained to a precision classification. Miniature lead screws have been supplied in both Steel and Stainless Steel and on some occasions in plastics.
Matching the screw to a suitable nut is also taken care of by the knowledgeable application engineers at Abssac who ensure performance orientated nut designs at competitive costs. Miniature lead screw applications require smooth operation and low frictional drag due to physically smaller drives with torque limitations. Ensuring the fit between the nut and screw threads is of paramount importance as any small errors in these areas can lead to torque spikes during operation. Then finally you look at how to attach the nut to the application. Can we add tangs, levers, external threads etc. to make the part do more. The next time you have a miniature application that requires the translation of rotary input to linear output then perhaps give Abssac a call.
We offer manufacturing services for complete turn-key lead screw assemblies to your specifications. Precision CNC machining services transform our standard thread products into your proprietary designs. Let us optimise the function of your leadscrew product by having your engineering department collaborate with Abssac during the design phase of your linear motion application.We also welcome replication work. You may have an old acme screw that needs replacing but have no technical drawing specifications to work from.
|Matching Simple Nut||Matching Anti-backlash Nut|
|M3 x 0.50||3||0.5||•||•|
|M4 x 0.70||4||0.7||•||•|
|M5 x 0.80||5||0.8||•||•|
|M6 x 1.0||6||1||•||•|
|M8 x 1.0||8||1||•||•|
|M8 x 1.25||8||1.25||•||•|
|M10 X 1.25||10||1.25||•||•|
|M10 x 1.50||10||1.5||•||•|
|M10 x 2||10||2||•||•|
|M10 x 3||10.00||3.00||•||•|
|M10 x 5||10.00||5.00||•||•|
|M10 x 10||10.00||10.00||•||•|
|M10 x 20||10.00||20.00||•||•|
|M10 x 35||10.00||35.00||•||•|
|M12 x 1.50||12||1.5||•||•|
|M12 x 1.75||12||1.75||•||•|
|M12 x 3||12.00||3.00||•||•|
|M12 x 4||12.00||4.00||•||•|
|M12 x 5||12.00||5.00||•||•|
|M12 x 6||12.00||6.00||•||•|
|M12 x 10||12.00||10.00||•||•|
|M12 x 15||12.00||15.00||•||•|
|M12 x 25||12.00||25.00||•||•|
|M12 x 45||12.00||45.00||•||•|
|M14 x 2.0||14||2||•||•|
|M16 x 1.50||16||1.5||•||•|
|M16 x 2.0||16||2||•||•|
|M16 x 4||16.00||4.00||•||•|
|M16 x 5||16.00||5.00||•||•|
|M16 x 8||16.00||8.00||•||•|
|M16 x 16||16.00||16.00||•||•|
|M16 x 25||16.00||25.00||•||•|
|M16 x 35||16.00||35.00||•||•|
|M20 x 4||20.00||4.00||•||•|
|M20 x 8||20.00||8.00||•||•|
|M20 x 12||20.00||12.00||•||•|
|M20 x 16||20.00||16.00||•||•|
|M20 x 20||20.00||20.00||•||•|
|M20 x 45||20.00||45.00||•||•|
|M24 x 5||24.00||5.00||•||•|
|Key: • Available|
Using a comprehensive range of screw diameters from 8mm through to 36mm, and combining these with two standard types of nut, (Flanged preloaded or simple flanged) results in a high integrity lead screw and nut product that is ready to be fitted directly into the application and perform.
The screws can be manufactured from Steel, Stainless Steel and Aluminium whilst the associated nuts are available in wear resistant thermoplastic (Plastic Polymer Nuts: - 40 deg C to + 60 deg C) or Bronze (Bronze Nuts: - 40 deg C to + 200 deg C) for higher loads or temperature. When choosing a High helix lead screw for your application you should consider that we can offer a standard Lead Accuracy 0.21mm / 300mm or a precision Lead Accuracy of 0.10mm / 300mm.
We offer a full end journal machining service with this product, so that the product can fit suitable radial and thrust bearings.
|HIGH HELIX LEADSCREW WITH STANDARD THREAD||HIGH HELIX LEADSCREW WITH STANDARD THREAD||HIGH HELIX LEADSCREW COMPLETE WITH FINE-PITCH THREAD|
|Screw: Steel (including stainless)||Screw: Steel (including stainless)||Screw: Steel (including stainless) or hard-anodised Aluminium|
|Nut: Plastic or Bronze||Nut: Plastic or Bronze||Nut: Plastic or Bronze (only with screws made of Steel)|
|Diameter 8mm x 10mm Pitch||Diameter 20mm x 12mm Pitch||Diameter 6mm x 25mm|
|Diameter 10mm x 12mm Pitch*||Diameter 20mm x 45mm Pitch||Diameter 7.5mm x 7.5mm|
|Diameter 12mm x 15mm Pitch*||Diameter 21mm x 27mm Pitch*||Diameter 8mm x 30mm Pitch*|
|Diameter 12mm x 25mm Pitch||Diameter 21mm x 35mm Pitch||Diameter 10mm x 10mm|
|Diameter 10mm x 50mm Pitch*||Diameter 22mm x 20mm Pitch||Diameter 11mm x 40mm Pitch*|
|Diameter 11mm x 60mm Pitch||Diameter 22mm x 50mm Pitch||Diameter 12mm x 45mm Pitch*|
|Diameter 13mm x 20mm Pitch||Diameter 23mm x 30mm Pitch*||Diameter 12.5mm x 12.5mm Pitch|
|Diameter 13mm x 70mm Pitch||Diameter 24mm x 40mm Pitch||* available with right-handed and left-handed thread|
|Diameter 14mm x 8mm Pitch||Diameter 24mm x 55mm Pitch|
|Diameter 14mm x 18mm Pitch*||Diameter 26mm x 16mm Pitch|
|Diameter 14mm x 30mm Pitch||Diameter 26mm x 24mm Pitch|
|Diameter 15mm x 20mm Pitch||Diameter 26mm x 60mm Pitch|
|Diameter 15mm x 80mm Pitch*||Diameter 27mm x 45mm Pitch||HIGH HELIX LEADSCREW WITH INCH THREAD|
|Diameter 16mm x 21mm Pitch||Diameter 28mm x 65mm Pitch||Screw: Steel (including stainless) Nut: Plastic or Bronze|
|Diameter 16mm x 25mm Pitch||Diameter 30mm x 28mm Pitch|
|Diameter 16mm x 35mm Pitch||Diameter 30mm x 50mm Pitch||Diameter 9.7mm x 25.4mm Pitch|
|Diameter 16mm x 90mm Pitch*||Diameter 30mm x 70mm Pitch||Diameter 11.2mm x 30.5mm Pitch*|
|Diameter 18mm x 16mm Pitch||Diameter 32mm x 20mm Pitch||Diameter 12.8mm x 35.6mm Pitch*|
|Diameter 18mm x 24mm Pitch*||Diameter 32mm x 75mm Pitch||Diameter 14.3mm x 40.6mm Pitch*|
|Diameter 18mm x 40mm Pitch||Diameter 34mm x 32mm Pitch||Diameter 16.0mm x 45.7mm Pitch*|
|Diameter 18mm x 100mm Pitch*||Diameter 34mm x 80mm Pitch||Diameter 17.6mm x 50.8mm Pitch*|
|Diameter 19mm x 30mm Pitch||Diameter 36mm x 200mm Pitch||Diameter 25.7mm x 76.2mm Pitch*|
|* available with right-handed and left-handed thread||* available with right-handed and left-handed thread||* available with right-handed and left-handed thread|
Now also available in Aluminium. For each screw type we offer a preloaded, anti backlash nut or standard single nut designs, complete with flange for ease of connection. Special designs of nuts can be supplied via our speedy engineering department.
An optional flange that can be installed on our line of Plain and Anti-Backlash lead nuts for additional mounting options.
If you are interested in the using the metric screw ranges, do not forget that we also supply the full range of linear guides and rails which can provide the load support in your linear mechanism. Offering excellent rigidity and parallelism during operation the guides can be used in both vertical and horizontal planes.
Following the link to that product page Guides
Please do not forget to ask for our competitive support bearing prices!
If you require further technical information, please do not hesitate to contact our sales engineers who will be more than happy to help you with your selection.
We provide a full range of quality, low cost lubricants for all our linear products including low vapour pressure greases for clean room and vacuum applications. For example the new Trigel line is specifically formulated to offer a lubrication solution for a wide range of linear motion applications. Please ask for further details. Grease features include, Temperature range -30°C to 150°C, Revolutionary multi-complex soap technology, Greatly extended lubrication intervals typically 3 times longer than conventional soap thickened greases. Good corrosion resistance. Some greases are supplied blue in colour for high visibility.