Soft substrate for the grinder with my own hands

Self-made grinders for all occasions. Pads with which manual sanding will cease to be a challenge

The availability of sanders doesn’t negate the need for hand sanding. It provides more delicate treatment, better control over the process and allows to reach the places the machine will miss. corners, curved curves, shaped edges, etc.

Manual equipment is indispensable for sanding workpieces between layers. They ensure the most delicate sanding and eliminate the risk of damage to the finish. In some cases, such as intermediate processing of lacquer coating, experienced craftsmen recognize only manual sanding. It is not an absolute alternative to sanding machines. it is a separate technique that complements the mechanical tools and distinguishes the handwriting of professionals.

About sanding pads

When sanding by hand, sanding pads, or simply sanding pads, are an indispensable assistant to the carpenter. The task of these uncomplicated devices is simple: to ensure uniform contact of the sandpaper with the machined surface. The use of sanding pads increases speed and improves the quality of sanding, extends the life of the abrasive and protects against irreparable defects in the form of depressions and rounded corners.

Carpenter, who uses shop grinders. a rarity (although the modern market is not napping on this account). A simple rectangular scrap wrapped with sanding paper, 100% copes with this function. But it is much more convenient to have a set of pads on hand at all times, including those that will allow you to perform specialized operations. grinding curved edges, shaped s and other hard-to-reach places.

We offer several interesting projects of homemade polishers: from the simplest variants to special shaped pads. Useful tips that will work for the quality of your sanding.

Advantages and disadvantages

Consider the pros and cons of foam and lambskin discs.

The disadvantages of foam wheels for car polishing include rapid heating and high consumption of paste. The advantage is the variety of choice and low price.

The pros of sheepskin nozzles include:

Foam polishing wheel for the car

As a result, each nozzle must be selected for the specific case.

What nozzles are suitable for polishing cars?

Usually, the following types of nozzles are used in order to polish an automobile with a drill:

  • Felt nozzles, which are soft cylindrical or flat felt circles. Such nozzles serve both to clean the surface before polishing, and for the final polishing of the surface.
  • The lambskin cap nozzle, which is ideal for the final polishing stage. They give a truly brilliant result.
  • Cups consisting of a cloth cord or covered with leather. These can be used to clean products before polishing and are suitable for both flat and textured surfaces. Leather pads are softer, so they are good for patent leather or acrylics, but the cord pads can be used for metal.
  • Nozzles made of foam rubber. When buying such nozzles, you should take into account that the finer the cells on the foam wheel, the softer the effect of polishing will be.

In addition, polishing nozzles for drills are divided into two categories, depending on the shape:

To treat the body of the car with a drill, you will need an adapter. a device on which the nozzle or polishing wheel is attached.

Before you start polishing, it is necessary to apply a thin layer of a special product to the surface. In the process, the nozzle will distribute the product over the surface, making it shiny.

Making the body of an angle grinder nozzle

To start with the fact that structurally the grinder can be different and differ primarily in size. So there is no universal size for this nozzle, you need to measure everything in the course of work.

How to connect the nozzle to a vacuum cleaner

The plastic nozzle will act as a dust collector, but it does not adhere tightly to the treated surface, you need to solve this problem, and attach the nozzle to the hose of the vacuum cleaner.

Additionally tape it with the same duct tape, fixing it securely to the body, but so as not to cover the two side holes for engine ventilation. If you close. the device will simply burn out.

How to use the polisher properly

Remove old paint from a small area of the body with a P2000 sandpaper. The process is automated for complete cleaning and polishing of the vehicle. In order to properly polish a car with a polisher, you need to comply with the following requirements:

  • Divide the body into several parts (50×50 cm) and work with each of them separately. the abrasive or polishing paste must not dry out
  • Abrasive is distributed over the surface at minimum speed, and then included increased speed. 1800-2200 rpm
  • Inadmissible overheating of the surface. periodically turn off the car polisher to cool the body
  • The movements are made smoothly and evenly, with moderate pressure on the entire sole area
  • If at first the area was polished from side to side, in the next cycle of the car body polisher movements are made from top to bottom. this prevents the emergence of grinding ribs
  • During operation, the polishing wheels should be brushed with a brush

What to look for when choosing a wheel for polishing

Sometimes polishing pads already come with polishing liquids, but if the products are purchased separately they must be considered:

  • The shape. There are two types of discs: flat-grinding (in the form of a circle) and petal (cone-shaped). In order to polish as effectively as possible, it is better to buy products of several shapes.
  • Stiffness. This parameter directly depends on the type of polishing paste. If the fluid is used to restore the body, it is also necessary to select a harder polishing wheel. To choose the right disc, just pay attention to its color: black ones are considered the softest, orange ones are of medium hardness and suitable for all pastes, white circles are the hardest, so they are most often used to remove the most serious scratches.
  • Diameter. It is better to buy several different diameter discs, then you will be more convenient to polish different parts of the car and hard-to-reach places. The largest discs are usually chosen for polishing the body, and the smallest discs for the headlights.
  • Attachment type. Discs can be attached to the polisher or a regular drill in two ways: screwed on the thread or fixed with Velcro. The latter option is considered universal, as you do not have to select discs by thread diameter.

When choosing a nozzle for car polishing, you need to pay the most attention to the material of the sanding coating, because it will depend on it, and for what works more suitable circle.

This is interesting: Body and underbody cavity waxing


I have several Interskol sanders in my shop (PMM-32/130, PMM-104/220). All of them are equipped with a dust canister in a plastic case, which is attached to the grinder via two small cams on the connecting spigot.

Some Zubr grinders are also equipped with the same dust collector. A similar design is used by other manufacturers. The disadvantage of this design is that during the grinding machine vibration is transmitted to the dust collector, which is attached only one end of the grinding machine. As a result, these two knuckles are subjected to quite a heavy vibration load. Two small cams for attaching a fairly massive dust canister. an obvious engineering mistake.

I’m not sure if the vibration tests during the ROC were done with different dust canister fills. As a result, the dust canister often detaches from the machine and falls to the floor while working. These falls do not pass without leaving a trace. Also, due to the vibration load, over time, the cams break off. I used to glue pieces of polystyrene on the spigot of the dust collector with dichloroethane and use emery boards to give them the shape of the lost cams. But over time I got tired of it. It was a quick decision to drill two coaxial through holes in the machine body and the dust collector, and fasten the latter with a crutch of wire (in the form of a letter “G”). With one machine converted this way, I finished making a garden furniture set. It would be ok, but to drill all the machines equally for interchangeability of dust collectors is difficult enough. The solution came out of the blue. In my hands I got a dust bag from an old vacuum cleaner. When using the vacuum cleaner disposable bags were used, and the native reusable one has never been in use and is stored in the closet. From this bag were sewn three dust collectors, which it was decided to mount to the machine plumbing 25-40 clamp with a wingnut. Such a construction turned out.

The grinder upgrade. Redesigning the sole.

In this video I made a sole for the grinder. After trying it out, I find that it transmits less vibration to the hand. You can always return the original sole in place. By reducing the gap between the soleplate and the housing, dust extraction is significantly increased. #goodwin #goodwin workshop #grinder upgrade #rework

Which grinder to choose HOW to change the 125 soleplate at 150

How to put the machine 125 soleplate 150 = what grinder to choose an eccentric orbital surface grinding electro or pneumo = auto painting = polishing cars = primer auto = putty auto = over-welding auto = preparing the car for painting = body repair = body repair = in the garage = with their hands– will be very glad to receive your help. card number belarusbank 6711 7700 1451 9461 ILONA CHARNIATSOVA. thanks

Soles, pads, spacers and nozzles

3M Hookit multi-duster mandrels are used in conjunction with orbital sanding machines and are designed for mounting grinding wheels with the 3M Hookit mounting system Mounting of grinding wheels is carried out by means of a plastic connection.

The 3M Roloc screw abrasive mounting system is designed for use with small-diameter wheels, and is designed for localized weld cleaning, hard-to-reach areas, and localized areas.It simplifies the installation of the grinding wheel.

Designed for perfect preparation of contoured surfaces and complex shapes It enables maximum surface quality and uniformity 3M Hookit attachment system 3M Hookit soft backing plate is designed for perfect preparation of contoured surfaces.

Designed for the perfect preparation of contoured surfaces and complex shapes Achieves maximum surface finish and uniformity 3M Hookit attachment system 3M Hookit soft backing is designed for the perfect preparation of contoured surfaces.

The soft backing is used for uniform pressure distribution on the work surface when machining complex contoured surfaces. Also reduces the wear of the mandrel. Backing pad with 15 holes, universal for use with hook-and-loop fastener wheels with 7.

Mandrel 64862 is designed for installation of 180mm diameter fibre grinding wheels on angle grinders for grinding of metal plane and deburring of weld seams and other grinding operations. The mandrel is made of polyamide, which is capable of spewing out.

Designed for felt and fur polishing wheels Mounted on polisher Easy to use 3M Finesse-It Hookit Soft mandrel was specifically designed for 125 mm diameter felt and fur polishing wheels.

Screw-type 30 mm collet adapter, with which CF scraping disc art. 5-160-0075 mounted on a collet clamped scraper.

Flexible mandrel for manual polishing with hook-and-loop fastener.

The FINISH Back polishing pad is used to achieve a high gloss and is suitable for all types of polishers. Due to its special, very soft surface and flexible edges it does not leave any scratches after polishing. Suitable for all types of.

Carsystem Excenter Back Pad T.19-T. It is a rigid base for all types of grinders.Recommended for rough to finish sanding.With special adapter and two different screws (M8 and 5/16″) suitable for all commercially available.

Carsystem Excenter Back Pad T.19-S. is a soft base for all types of sanding machines.Recommended for rough sanding to finish sanding.With special adapter and two different screws (M8 and 5/16″) it is suitable for all commercially available.

3 mm thick protection pad for the sanding pad.

Intermediate spacers used to reduce wear and tear on the soles of grinders and hand tools.

Protection pad without bore holes (for 150 mm machines). Intermediate protection pad without holes, prevents the ingress of moisture into the tool and the dust extractor.Protective pads to block dust extraction are needed when dust extraction is not necessary.

Homemade nozzles

The attachments for sanding the car for a grinder or drill can be made with your own hands from improvised tools. Although few users resort to this solution. This is due to the fact that branded analogues have a relatively low cost, high quality, and to acquire them, of course, much easier.

The easiest to create with your own hands a nozzle of the end type. As the basis, a round file is used, and in order to prepare it for installation on the tool, you need, first of all, to remove the handle and saw the place of its installation. Then the file is simply clamped in the chuck of the drill. Such a nozzle can expand and polish holes, as well as hard-to-reach places.

You can also make your own hands polishing nozzle for a drill out of felt disc for grinder or machine, in other words, just adapt it under the drill. To do this, you must first find or make a pin of the appropriate diameter and put a thread on its end. It is screwed on first with a limiting nut, then a wide washer, then a polishing disc, and then the washer and nut are put on top again in reverse order. This device is used for the final processing and polishing, and often a drill with such a nozzle is fixed on the workbench.

It is not difficult to make your own drum-type nozzle. As the basis for it you can use a wooden part in the form of a cylinder or a piece of rubber rod. To it you need to attach a pin and sandpaper. Abrasive material can be fitted, for example, with rubber inserts.

Features of the drill as a grinding tool

The widespread use of drills for grinding is not only due to the lower cost, but also because of its versatility. That is, drills can be used for a variety of jobs, while the functionality of the grinder is much lower. As for grinding, given the variety of appropriate accessories for the drill, even in these works, it may be in some cases more functional than a grinder, especially when processing hard-to-reach places and small parts.

However, the drill is not a professional tool, and therefore some attachments are inefficient and inconvenient, mainly because of their small dimensions. That is why they are not suitable for machining large surfaces of the bodywork when they are hard to reach. over, the diversity of both attachments and drills makes the choice difficult. Thus, some attachments are only suitable for high-power devices equipped with speed control.