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B500DD/MB500DD Series

B500DD series bearings are used for airframe control. These tube-type bearings are extra light torque products.

Extra Light Torque Tube Type
Aircraft Control Bearing

Manufactured to AS27646 per AS7949
Extra light duty
Single row ball bearing
PTFE coated fiberglass seals
All external surfaces except bore and seals are cadmium plated
Pre-lubricated (see grease specifications)
This series is dimensionally interchangeable with the unshielded B500 series

MB500DD Series

Manufactured to AS21428 per SAE AS7949
When ordering precision parts be sure to add the “M” prefix to the standard part number

wdt_ID	Part Number	MS 27646-	Bore d (in.) <br>+.0007 to -.0007 <br> +.0000 to -.0005	Outside Diameter D (in.)<br>+.0000 to -.0010<br>+.0000 to -.0005	Inner Ring Width B (in.)<br>+.000 to -.005<br>+.0000 to -.0025	Outer Ring Width C (in.)<br>+.000 to -.005<br>+.000 to -.005	Inner Land Diameter d1 (in.)	Inner Ring Chamfer c1 (in.)	Outer Ring Chamfer c (in.)	Radial Limit Load Rating (lbs.) †	Thrust Limit Load Rating (lbs.) †	Footnote(**)	Footnote(***)
1	B538DD	-38	0.625	1.0625	0.281	0.250	0.777	0.015	0.015	3280	1500
2	B539DD	-39	0.6250	1.0625	0.280	0.250	0.900	0.020	0.020	3750	1700
3	B540DD	-40	0.7500	1.1875	0.281	0.250	1.016	0.015	0.015	4220	1900
4	B540DD	-40	0.8750	1.3125	0.281	0.250	1.016	0.015	0.015	4220	1900
5	B541DD	-41	1.0625	1.5000	0.281	0.250	1.216	0.015	0.015	5000	2200
6	B542DD	-42	1.3125	1.7500	0.281	0.250	1.451	0.015	0.015	5950	2700
7	B543DD	-43	1.5625	2.0000	0.281	0.250	1.702	0.015	0.015	6880	3200
8	B544DD	-44	1.8125**	2.2500***	0.281	0.250	1.970	0.015	0.015	7980	3600	+.0010 inch/-.0010 inch +.0000 inch/-.0008 inch	+.0000 inch/-.0015 inch +.0000 inch/-.0007 inch
9	B545DD	-45	2.0625**	2.6250***	0.281	0.250	2.286	0.015	0.015	9220	4000	+.0010 inch/-.0010 inch +.0000 inch/-.0008 inch	+.0000 inch/-.0015 inch +.0000 inch/-.0007 inch
10	B546DD	-46	2.3125**	2.8750***	0.281	0.250	2.527	0.015	0.015	10150	4400	+.0010 inch/-.0010 inch +.0000 inch/-.0008 inch	+.0000 inch/-.0015 inch +.0000 inch/-.0007 inch
	Part Number	MS 27646-	Bore d (in.) <br>+.0007 to -.0007 <br> +.0000 to -.0005	Outside Diameter D (in.)<br>+.0000 to -.0010<br>+.0000 to -.0005	Inner Ring Width B (in.)<br>+.000 to -.005<br>+.0000 to -.0025	Outer Ring Width C (in.)<br>+.000 to -.005<br>+.000 to -.005	Inner Land Diameter d1 (in.)	Inner Ring Chamfer c1 (in.)	Outer Ring Chamfer c (in.)	Radial Limit Load Rating (lbs.) †	Thrust Limit Load Rating (lbs.) †	Footnote(**)	Footnote(***)

† Refer to the Technical Info section for Bearing Life Calculations.

* Maximum shaft or housing fillet which bearing corner will clear.Notes:

Do not use bearings as track rollers, cam follower rolls or for similar applications.
Check with Schatz Bearing Corporation for current approval status.
Contact Schatz Bearing Corporation’s Engineering Department for further technical information.
Check with Schatz Bearing Corporation’s Sales Department for price and availability.

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