Installation Instructions

Series MB

Drilled hole

• The drilled hole must be within the tolerances shown on the preceding dimensional sheets.
  
• The counterbored hole (d₂) must be properly sized for the through hole (d₃) according to the dimensional sheets.
• Holes must be round within 0.05 mm.
  
• With hard materials the bore roughness should be from R_z = 10-30 µm for best results.
  
• Longitudinal rifles and spiral grooves should be avoided. These influence the sealing effectiveness.
  
• The bore must be free of oil, grease and chips.

Setting procedure

With  the ball facing out the KOENIG Expander® is inserted in the counterbored  hole. The top sleeve should not be above the surface of the base  material. With only a slight or no counterbore, the base of the sleeve must be adequately supported during installation. The  ball can now be pressed in until the top of the ball is below the edge  of the sleeve. Corresponding approximate values for stroke S as well as the dimensions X are from the table below.

Important:

Use the proper size setting tool for the KOENIG Expander® according to the data sheet. Cleaning/degreasing of plugs before installation, only spray cleaning with air drying allowed. (No dipping and vacuum drying).

Press

Assembly lines with limited travel are preferred as insertion force is difficult  to control. KOENIG Expander®s are also ideal for automated installation  since they offer optimal orientation capability. Small quantities or  single parts can be installed with a hammer and setting tool.  Installation can also be done with an arbor press.

Installation dimensions

MB 600 / MB 700 / MB 850 series
d1 (mm)		3	4	5	6	7	8	9	10	12	14	16	18	20	22
S (mm)	Stroke (standard value)	1.2	1.5	2.0	2.5	3.0	3.5	4.0	4.5	5.5	6.35	7.0	8.0	9.0	10.0
X (mm) ± 0,2	Position of top of ball relative to top of sleeve	0.4	0.2	0.4	0.4	0.4	0.3	0.4	0.4	0.4	0.4	0.6	0.6	0.8	0.8

Setting forces

a) Force with minimum bore tolerance
b) Force with maximum bore tolerance

Measured in steel with a tensile strength of Rm = 1000N/mm².
Base materials with lower tensile strengths show lower values

Plug removal

With KOENIG Expander® MB series removal of the plug is possible. The plug can be drilled out  with a carbide tipped drill or with a high speed steel drill.

MB 600-030 to 140	Ball HB	~200:	High Speed Steel Drill
MB 700-030 to 220	Ball HRC	~45:	Carbide Tipped Drill
MB 850-030 to 220	Ball HRC	~45:	Carbide Tipped Drill

Procedure

• Expander diameter 6 mm or .250 inch:
  Drill out, in one process, to the next larger diameter according to the data sheet.
  
  
• Expander diameter over  6 mm or .250 inch:
  Drill out in several steps with last step to the next larger diameter according to the data sheet.
  
  
• Clear chips, remnants of the sleeve, and oil and grease from the bore.
  
  
• Install a new KOENIG Expander®.
  
  
• Note: After plug removal always use the next larger size plug.