Double D4
£3,121.00 exc. VAT
Double Rolling Mill – Double D4 rolling mill from Durston Tools. This exceptional rolling mill has two sets of rolls, the top set for flat rolling and the bottom set grooved for square wire rolling. Both sets of rolls also have extension rollers. The top rolls incorporate four half rounds and the bottom rolls an additional three half rounds. The rolling mill is supplied with two turning levers.
In stock
This exceptional rolling mill has two sets of rolls, the top set for flat rolling and the bottom set grooved for square wire rolling. Both sets of rolls also have extension rollers. The top rolls incorporate four half rounds and the bottom rolls an additional three half rounds. The rolling mill is supplied with two turning levers. The first is used for heavy rolling, and this includes a gear reduction of 11-1. The second turning lever can be used for lighter rolling at twice the speed with a gear ratio of 5-1. Lever changeover takes only a few seconds. The top mill features an extra wide flat area of 158mm between two rollers with a diameter of 60 mm, each enabling a maximum roll thickness of 6 millimetres. The bottom mill has a total of 19 square wire grooves and 3 half rounds (7×1.75mm, 6×1.5mm, 5×1.25mm) allowing wire rolling from 10mm to 1mm. The side extensions enable half round rolling of 8, 7, 6, 5, 4, 3, 2, and 1.5mm. Safety features include all gearing being covered with plastic housing. The mill itself is constructed from a single piece of cast iron to maximise rigidity and strength, and all rollers are induction hardened to 64 RC to ensure your rolls lasts a lifetime. This is an exceptional workhorse of a rolling mill and will offer years of service.
Click here to download the instruction manual.
Click here to download the mounting hole diagram.
D4 158 Additional Instructions
The D4 158 has a second lever which is used for doubling the turning speed of the rolls. This second lever is useful when you are rolling out the smaller jobs where not so much effort is required, making the rolling quicker. For larger jobs, the lower lever, which is located on the wire roll, is the best to use as it gives you the maximum reduction on the gearbox.
To change the standard lever (lower lever on the wire roll) to the second lever, remove the circlip on the wire roll (right-hand side) and the first lever will slide off. Now insert the second lever into the cover on the lower sheet roll. The two hardened dowels will locate into the gear. Then tighten up the two 10mm bolts (17mm spanner).
When turning with the standard lever, turn the lever anti-clockwise. When using the second lever, turn clockwise.
Lower turning reduction (First turning handle): 11-1 on the Flat rolls and 5-1 on the Wire rolls. (Lower turning handle is the lighter lever with the gear on the end. It locates on the end of the wire roll and is secured using a circlip)
Higher turning reduction (second turning handle): 5-1 on the Flat rolls and 2.5-1 on the Wire rolls (Higher turning handle is the heavier lever with the 4″ round boss. It locates on the end of the flat roll and is secured using the 2 bolts)
Additional or Replacement Extension Rollers available for this model:
Extension Roller 8, 6 & 3mm for Double Rolling Mills (Included as standard)
Extension Roller 10 & 7mm for Double Rolling Mills
Extension Roller 4, 3, 2 & 1.5mm for Double Rolling Mills (Included as standard)
Extension Roller Plain for Double Rolling Mills (Included as standard)
Please read our Rolling Mill FAQs tab for more information.
| Weight | 85.4 kg |
|---|---|
| Dimensions | 74 × 47 × 46 cm |
| Product Weight (kg) | 85KG |
| Product Length (mm) | 420 |
| Product Width (mm) | 220 |
| Product Height (mm) | 600 |
| Gearbox | |
| Number of Grooves | 19 |
| Half round sizes (mm) | 6 & 5mm, 7 |
| Max. Sheet Thickness (mm) | |
| Roller Type | |
| Roller diameter (mm) | 60 |
| Roller Length (mm) | |
| Side Extensions | 1.5, 2, 3, 4, 6 and 8mm |
| Max. wire capacity (mm) |
Rolling Mill Questions & Answers
Unfortunately it is not possible to add side extensions to a Rolling Mill. Please consider this if you are looking to purchase a new rolling mill and what your current and future requirements may be.
It is possible to use two half round extensions if your rolling mills supports extension rollers but you will need to re-order the 2 extension rolls together and inform us that they are to match, this way we can machine them as a matching pair.
Please note: You will not get perfect round with this solution. It will be oval shaped.
A rolling mill with no reduction (direct drive) means that when you turn the handle round once the rolls go round once.
A Rolling mill with reduction (with gearbox), let's say 4-1 means you will have to turn the handle four times for the rolls to go round once. A reduction of 5-1 means you must turn the handle five times for the rolls to go round once. Having a reduction gearbox makes lighter work of rolling.
Direct Drive means there is no gearbox on the rolling mill, the handle is linked directly to the rollers with no reduction.
If the model number has an "R" then it has a Reduction Box
If the mode number has an "E" It means there are side extensions
If the model number has "RE" then it has a reduction gearbox and side extensions
Unfortunately, reduction gearboxes cannot be added retrospectively.
Unfortunately, it is not possible to change a manual rolling mill to a powered rolling mill.
For the Rolls, the best oil to use is ‘3-in-1’’ oil to protect your rolls, apply layer with a cloth after use or regularly if not in use for long periods of time.
For the gears, we use lithium soap thickened grease when we are making the mills, but any standard gear grease can be used.
Sometimes the rollers do develop marks, but it will not affect the use of your mill at all and it will still work perfectly.
The Agile mills have a T bar instead of a handwheel and do not have extension rollers. The Agile mills also have additional half rounds on the main roll so it has less flat area.
DRM Rolling Mills have the round adjustment wheel, optional side extensions (E Models) and different roll / groove options.
Other than these differences, the mills are the same and offer the same performance.
Yes we do keep some spares for older generation Durston Rolling Mills
Generally, the minimum – maximum thickness is 0.1mm – 6mm
How thin can your mills roll material?
As a rough guide divide the diameter of the roll by 750.
For example, on Agile 110 the diameter is 50mm so 50 divided by 750 is 0.66mm
In fact, you can divide it by between 500 to 1000.
It depends on the width of material and the hardness but dividing by 500 to 1000 gives a good idea.
So basically, you can roll down to between 0.50 and 0.1mm depending on hardness.
If it is 30mm wide, then it might go to 0.1mm
If material is 10mm wide and soft it will roll down to .05mm
The turning lever is 35cm from the centre of the hole where it attaches to the mill to the end of the handle.
The dial is just a guide and does not provide exact measurements.
The best way to minimise is, do not roll with rolls closed. Have them open approximately 0.3mm and turn the wire 90 degrees on each pass.
When the rolling mill is not in use, apply a thin coating of rust preventative liquid. Using a clean and dry paint brush (approximately 12mm wide) apply the rust preventative across the rolls. Turn the rolls as you do this. Make sure the rolls are nearly closed. This will spread the liquid evenly over the surface. It is very important that your rolls are always protected, especially in moist/wet/hot conditions or where temperatures are changing. Once your rolls are marked/rusty/corroded they will be like this until you have them removed and reground. (However, please note that it is almost impossible that you will end up with perfect rolls. Over time and use they will get slightly marked but will still work perfectly well). When using your mill again remove all rust preventative and ensure your rolls are clean and dry before you start to roll material.
It is also recommended that you cover your mill when not in use. This is to prevent the rust preventative from collecting dust and dirt.
Keep the rolls clean. Do not touch the rolls. Oils and acids from your body can damage the rolls, leaving behind small marks and eventually
rust.
Make sure all material is dry before rolling.
Ordering FAQs
Yes we ship worldwide, please add items to the checkout and enter your address for a shipping cost.
You are welcome to call or email for help or information on any of our products but we are only able to accept orders and payments via our website, this allows us to give a better service and ensure all your details are correct.
We aim to ship all orders within a few days of ordering, depending on where you are in the world it may take only a couple of days or up to a week to arrive. We use DPD for UK deliveries and DHL for worldwide shipments. Larger orders such as Benches or heavy Rolling Mills will be sent on a pallet.
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