Bits and Screws

The Spin Robotics bit comes in two variants: a magnetic bit for use with magnetic screws and a vacuum bit for use with non-magnetic screws.

The vacuum bit consists of three main parts:

• Bit — a standard 50 mm Wera screwdriver bit, matched to the drive recess of the screw.

• Collar — transfers the suction, sets the bit protrusion and seals against the mouthpiece and safety shield via an O-ring.

• Mouthpiece — the suction cup that contacts the screw head.

The vacuum channel runs through the collar and opens at the mouthpiece, allowing the screw to be held against the bit face during pickup and transport.

The magnetic bit replaces the mouthpiece with a magnet embedded in the collar. Since no vacuum seal is needed, the magnetic bit does not have an O-ring.

Hint

It is recommended to use magnetic bits whenever the application allows it.

Selecting the Bit, Collar, and Mouthpiece

The bit, collar, and mouthpiece (vacuum only) must be selected to match the drive type and screw head geometry.

The tables below show the different bit collar sizes. The inner diameter of the collar must be selected to match the bit.

Vacuum collar size	Medium				Large
Inner diameter [mm]	2.5	3	4	4.5	5	6
Outer diameter [mm]	8				10

Magnetic collar size	Small		Medium		Large
Inner diameter [mm]	2.5	3	4	4.5	5	6
Outer diameter [mm]	6		8		10

The tables below list combinations of bit, collar, and mouthpiece for all supported screws.

Hexagon Socket Head Cap Screws

• ISO 4762

• DIN 912 (withdrawn)

Thread	Bit	Wera Ref.	Mouthpiece	Collar
M2.5	Hex 2 mm	840/4 Z	1001	4
M3	Hex 2.5 mm	840/4 Z	1002	4
M4	Hex 3 mm	840/4 Z	1003	4
M5	Hex 4 mm	840/4 Z	1004	5
M6	Hex 5 mm	840/4 Z	1005	6

Hexagon Socket Countersunk Head Screws

• ISO 10642

• DIN 7991

Thread	Bit	Wera Ref.	Mouthpiece	Collar
M3	Hex 2 mm	840/4 Z	1001	4
M4	Hex 2.5 mm	840/4 Z	1002	4
M5	Hex 3 mm	840/4 Z	1003	4
M6	Hex 4 mm	840/4 Z	1004	5

Note

M2.5 is not yet supported.

Hexalobular Socket Head Cap Screws

• ISO 14579

Thread	Bit	Wera Ref.	Mouthpiece	Collar
M2.5	TX8	867/4 Z	1101	3
M3	TX10	867/4 Z	1102	4
M4	TX20	867/4 Z	1103	4.5
M5	TX25	867/4 Z	1104	6
M6	TX30	867/4 Z	1105	6

Hexalobular Socket Cheese Head Screws

• ISO 14580

Thread	Bit	Wera Ref.	Mouthpiece	Collar
M2.5	TX8	867/4 Z	1101	3
M3	TX10	867/4 Z	1102	4
M4	TX20	867/4 Z	1103	4.5
M5	TX25	867/4 Z	1104	6
M6	TX30	867/4 Z	1105	6

Hexalobular Socket Countersunk Head Screws

• ISO 14581

• ISO 14582

Thread	Bit	Wera Ref.	Mouthpiece	Collar
M2.5	TX8	867/4 Z	1101	3
M3	TX10	867/4 Z	1102	4
M4	TX20	867/4 Z	1103	4.5
M5	TX25	867/4 Z	1104	6
M6	TX30	867/4 Z	1105	6

Hexalobular Socket Pan Head Screws

• ISO 14583

Thread	Bit	Wera Ref.	Mouthpiece	Collar
M2.5	TX8	867/4 Z	1201	3
M3	TX10	867/4 Z	1202	4
(M3.5)	TX15	867/4 Z	1203	4
M4	TX20	867/4 Z	1204	4.5
M5	TX25	867/4 Z	1205	6
M6	TX30	867/4 Z	1206	6

Hexalobular Socket Pan Head Tapping Screws

• ISO 14585

Thread	Bit	Wera Ref.	Mouthpiece	Collar
ST2.9	TX10	867/4 Z	1202	4
ST3.5	TX15	867/4 Z	1203	4
ST4.2	TX20	867/4 Z	1204	4.5
ST4.8	TX25	867/4 Z	1205	6
ST6.3	TX30	867/4 Z	1206	6

Hexalobular Socket Button Head Screws

• ISO 7380-3

• DIN 34805-1

Thread	Bit	Wera Ref.	Mouthpiece	Collar
M3	TX10	867/4 Z	1301	4
M4	TX20	867/4 Z	1302	4.5
M5	TX25	867/4 Z	1303	6
M6	TX30	867/4 Z	1304	6

Countersunk Head Screws, Phillips

• ISO 7046

• ISO 7050

• DIN 965 A (withdrawn)

Thread	Bit	Wera Ref.	Mouthpiece	Collar
M2.5	PH1	851/4 J	1401	4.5
M3	PH1	851/4 J	1402	4.5
M4	PH2	851/4 R	1403	3
M5	PH2	851/4 R	1403	3

Pan Head Screws, Phillips

• ISO 7045

• DIN 7985 A (withdrawn)

Thread	Bit	Wera Ref.	Mouthpiece	Collar
M2.5	PH1	851/4 J	1501	4.5
M3	PH1	851/4 J	1502	4.5
M4	PH2	851/4 R	1503	3
M5	PH2	851/4 R	1504	3

Note

PH2 combinations (M4, M5) require reduced-tip bits (Wera 851/4 R).

Adjusting the Bit Protrusion

When adjusting the position of the Wera bit in the collar, ensure that the bit is fully inserted into the screw while the mouthpiece/magnet is fully in contact with the screw.