Category: Machine conversion

4-fold bed slide stop for PM5000

Builder: Klaus Zenkert

Close-up of a lathe with cylindrical workpiece holder attached with pins and screws, all in shimmering silver metal on a red and grey base.

Functionality of the 4-fold bed slide stop

A dovetail joint was installed on the 4-fold bed slide stop. The prism stop bracket on the machine and the centre sleeve of the 4-fold bed slide stop were manufactured from scratch with a dovetail guide. This allows the 4-fold bed slide stop to be pushed onto the prism stop bracket with a perfect fit.

The sliding stop rods (diameter 10 mm) are clamped by an M6 hexagon socket screw. A 5 mm radius is milled into the side (centre) of the cylinder. The right-hand cylinder component with the M6 hexagon socket screw is inserted into the hole in the sleeve and secured with the left-hand clamping ring using grub screws. This secures the cylinder and prevents it from falling out. The 10 mm stop rods are inserted into the side of the cylinder and secured with the Allen screws.

To loosen the stop rod, simply unscrew the hexagon socket screw 2 turns and tap lightly on the hexagon socket spanner. A locking screw with nut is attached to the left-hand clamping ring, which is connected to the cylinder by 4 grub screws, to prevent unintentional adjustment or rotation.

For legal reasons, we must point out that the conversion or modification of a machine can lead to the loss of CE conformity and the manufacturer's product liability. Paulitschek Maschinen- und Warenvertriebsgesellschaft mbH accepts no responsibility if the machine is not operated as intended or has been significantly modified after the conversion.

Tool used

Lathe PM5000
Iscar 26-3 cut-off holder (3 mm)
Quick-change steel holder set, "Multifix" system, size A
Edge finder
Vertex dividing attachment
3-jaw chuck
Milling cutter
Tap wrench

Procedure

Step 1

Make a sketch

First a sketch was created.

A 3D sketch shows a grey, cuboid object with brown and blue ends from which several black pins protrude. A circular detail is visible at one end.

Step 2

Turn the sleeve and ring

Material 1.2365 with a diameter of 80 mm was used for the sleeve and the ring. First, a pilot hole of 8 mm was drilled and a 30 mm drill bit was inserted to a length of 80 mm. This was followed by parting off with a 3 mm wide Iscar 26-3 parting-off holder.

🛈Dimensionsfor the sleeve: outside Ø75 mm, inside 55 mm, length 55 mm

Dimensions for the ring: outside Ø75 mm, inside 55 mm, length 10 mm

A lathe in action, a drill is machining a rotating piece of metal. Coolant is being fed in. Chips are lying around. Red and blue elements accentuate the scene.

Metal part in lathe holder, surrounded by chips.

Two metal rings, one flat, the other high, are standing on a workbench. The surface is rough and shows signs of machining. Other tools can be seen in the background.

Metal shavings in spiral form, blue and gold-coloured, lie in a container. Isolated shavings lie on a neighbouring metal block.

Step 3

Make the third component

A lathe is in operation: a metal cylinder is being machined, chips are flying. A tool is visible. A red play symbol indicates a video.

The three finished components for the stop.

🛈Dimensions:

Overall length 80 mm, shoulder outer diameter 75 mm;

Length 15 mm, outer diameter 55 mm;

Length 65 mm

A cylindrical metal component with a shiny surface lies on a surface. It appears to be composed of several elements.

Three metal components stand on an orange-coloured surface. A ring on the left, a cylinder in the centre and a cylinder with a wider base on the right.

Step 4

Drill holes for stop rods

The holes for the stop rods were then drilled into the centrepiece.

Metal drill drilling into workpiece, chips lying around. Grey machine in the background.

A metal cylinder lies horizontally on a table, with four metal rods protruding from each side.

Step 5

Milling the dovetail guide

A metal milling machine is machining a cylindrical workpiece. Chips are lying around. The cutter is silver-coloured, as is the workpiece.

A milling machine processes a piece of metal in a vice. Chips are lying around the workpiece.

Metal milling machine processes a cylindrical workpiece. A slot has already been milled into the workpiece. Chips are visible on the milling cutter.

Metalworking: A silver workpiece is being machined by a milling machine. Coolant and metal chips are visible. The machine is silver.

Metal parts on a table. Two rings, a cylindrical part with holes and three metal rods can be seen. The surfaces are shiny and reflect the light.

Step 6

Drill holes for clamps

The holes for clamping the stop rods were now drilled using a dividing head.

Metalworking machine with rotating chuck, fixed on a worktable with chip collection tray. Device with lever. Tools and sockets in the background.

Metal part clamped in a lathe, close-up. A cylindrical tool touches the metal. In the foreground, a round plate with four holes.

Close-up of a cylindrical metal object with a ring-shaped indentation and a round hole that provides a view inside. Metal struts run underneath.

Step 7

Clamping bolt

The brass clamping bolts were turned and milled.

A lathe machines a golden workpiece. The silver lathe chuck rotates quickly and is slightly blurred. Metal chips are lying around the workpiece.

Close-up of a milling machine in action. The metal milling cutter is machining a workpiece, chips are lying on the surface. Other tools are slightly out of focus in the background.

Metal column with clamp and hexagon socket screw in a side opening. Three small, gold-coloured metal pieces lie next to it.

Metal parts, including a cylindrical element with a pin and two holes, next to rods and brass pieces. An Allen key is inserted in the cylinder.

Close-up of four clamping bolts with silver-coloured heads and gold-coloured shafts on a wooden surface.

Step 8

Thread the clamping ring

The clamping ring was given an M6 thread to clamp it onto the cylinder core piece. Next, all the parts manufactured so far were assembled.

A tap is inserted into a metal workpiece lying on a workbench.

Metallic cylinder with screws and vertical rods standing on a wooden surface. Further pieces of metal can be seen above.

Step 9

Making the prism clamping block

Then it was the turn of the prism clamping block with the dovetail guide.

The dimensions (length, width, height) and the holes for the clamping can be taken from the original.

Close-up of a machine tool machining a piece of metal. Chips are lying around the area. The milling machine is grey and the workpiece is silver.

Close-up of a milling machine cutting into a grey V-shaped metal block. Metal chips are scattered around the block.

Metal ring, next to it a prism with cut-outs, both on chequered paper with a technical drawing and dimensions.

Step 10

Mount the stop

The ring was now removed from the sleeve and pushed onto the prism block using the dovetail guide. The ring was then pushed back on and clamped with the screw. The stop is now secured to the left and right.