Master Bushings & Bowls

* To print tables please download PDF

• Pin Drive Master Casing Bushings
• Square Drive Master Bushings
• Master Bushings Parts List & Components

Pin Drive Master Casing Bushings

Solid Body - Split Body - Hinged

pin drive master casing bushings

The Den-Con HMB Hinged Pin Drive master bushing is available for 37 1/2" - 60 1/2" rotary tables.

The 49 1/2" - 60 1/2" HMB is rated 750 ton. The 37 1/2" - 49 1/2" HMB is rated 500 Ton. Removable 500 ton, 4 taper split insert bowls are available for both models to allow handling capability for 2 3/8" to 13 3/8" tubular products. 750 ton, 4 taper insert bowls are available upon request for the 49 1/2" - 60 1/2" HMB. The HMB can easily be removed from the drill string by removal of one hinge pin. The Den-Con 27 RPH Roller Kelly Bushing is the drive bushing used with HMB 37 1/2" - 49 1/2".

The Den-Con SPB Solid Body Pin Drive master bushing is available for 20 1/2" - 27 1/2" rotary tables and is rated 500 ton. Removable 500 ton, 4 taper split insert bowls are available to allow handling capability for 2 3/8" to 13 3/8" tubular products. Refer to parts tables for casing bowls and sizes.

The Den-Con SMB Split Pin Drive master bushing is available for 17 1/2" - 27 1/2" rotary tables and is rated 500 ton. The SMB is a split master bushing with the API 4 taper machined into the body halves to handle 8 5/8" & smaller tubular products. This bushing is a split design to eliminate the need to strip over the master bushing while running large tools during surface hole work. The SMB does not allow for use of removable insert bowls. All of the pin drive master bushings have Pin drive hole locations to API dimensions.

The Den-Con HMB Assembly, Parts and Bowls are interchangeable with Varco MPCH Bushings.

The Den-Con SPB Assembly, Parts and Bowls are interchangeable with Varco MSPC Bushings.

Ordering Information
Specify rotary table make, size and type when ordering.

ROTARY TABLE SIZE	MAIN ASSEMBLY NUMBERS
ROTARY TABLE SIZE	HMB HINGED	SPB SOLID PIN DRIVE	SMB SPLIT PIN DRIVE	SSB SOLID SQUARE DR.	SSD SPLIT SQUARE DR.
17 1/2”			3315	2501	2522
20 1/2”		2525	3309	2502	2523
23”		3325	3320	2503	2521
27 1/2”		2526	3300	2504	2524
37 1/2” - 49 1/2”	2700
49 1/2” - 60 1/2”	8011

HMB ORDERING INFORMATION
W/ #33 BOWL, SLING & BB PLATE		ADAPTER RINGS*		NATIONAL & ABC0	OILWELL & G.D.	EMSCO	LTI	IDECO	WIRTH
PART #	WT. LBS.	PART #	SIZE	37 1/2” - 49 1/2”	37 1/2” - 49 1/2”	37 1/2” (S/N 49 UP) - 49 1/2”	37 1/2” - 49 1/2”	37 1/2” - 49 1/2”	37 1/2” - 49 1/2”
2700-1	4050	2763	49 1/2” - 37 1/2”	Yes
2700-2	4250	2763-2			Yes				Yes
2700-3	4150	2763-3	49 1/2” - 37 1/2”			Yes
2700-4	4015	2763-4	—					Yes
2700-5	4320	—	—
		2759	37 1/2” - 27 1/2”
2700-6	4050	2763-6					Yes
*See Adapter Ring Data Table (page 18) for additional details and configurations.

*See Adapter Ring Data Table for additional details and configurations.

Square Drive Master Bushings

The Den-Con SSB Solid Body Square Drive Master Bushing is available for 17 1/2" to 27 1/2" rotary tables and is rated at 500 ton. The drive square is the same API dimension found in all square drive master bushings. The SSB is designed with removable insert bowls.

The Den-Con SSD Split Square Drive Master Bushing is designed as a replacement bushing for all original O.E.M. manufactured bushings. This bushing is available for 17 1/2" to 27 1/2" Rotary Tables and is rated at 500 ton. All bushings have the standard API 4 taper to handle 8 5/8" and smaller tubular products.

Master Bushings Parts List & Components

Drive Hole Bushing Replacement-Pin Drive Bushings.

REMOVAL
1. Using an Acetylene torch, split worn bushings from top to bottom, in two place approximately
180 degrees apart.
2. Clean out drive holes, remove any rust and deburr the top edge.
Note: Place new drive hole bushing in a freezer to shrink.
INSTALLATION
1. Preheat the Master Bushing body around the drive hole area to 400-500°F.
2. Take drive hole bushing from freezer and place bushing in ice until ready to install.
3. Press drive hole bushing, chamfered end up, until flush with top of master bushing body.
4. If no press is available, make sure Master Bushing drive hole area is at the proper temperature.
Drive the drive hole bushing with a wooden block to seat drive hole bushing. Drive as rapidly
as possible using a sledge hammer.

Den-Con Master Bushing Parts List

QTY. REQ’D.	DESCRIPTION	37 1/2” HMB 500 TON	27 1/2” SPB 500 TON	20 1/2” SPB 500 TON	27 1/2” SSB 500 TON	23” SSB 500 TON	20 1/2” SSB 500 TON	17 1/2” SSB 500 TON	27 1/2” SMB 500 TON	20 1/2” SMB 500 TON	49 1/2” HMB 750 TON
1	Assy.	2700	2526	2525	2504	2503	2502	2501	3300	3309	8011
1	Body Only	2701	2528	2527	2508	2507	2506	2505	3302	3309	8011
4	Drive Hole Bushing	2713	2713	2534					2535	2534	2713
1	Hinge Pin, Removable	2711									8047
1	Hinge Pin, Stationary	2709									8046
1	Hinge Pin Retainer	2715									2715
2	Lock	2541	2541	2543		2514	2514	2514			2541
2	Eccentric Pin	2542	2542	2544		2515	2515	2515			2542
2	Retaining Pin, Lock	50106-24	50106-24	50106-20		50104-10	50104-10	50104-10			50106-24
1	Bit Breaker Plate	2537	2537	2536					2537	2536	8022
1	Lifting Sling	2712	2511	2511	2511	2511	2511	2511	2511	2511	8023
INSERT BOWLS - 500 TON, 4 TAPER
1 Set	API Bowl, 8 5/8” & Smaller Pipe	2706	2530	2529	2546XT 2510	2545XT 2509	2545XT 2509	2545XT 2509			8018
1 Set	No. 32 Bowl, 10 3/4” & 9 5/8” Casing	2707	2532	2531	2547XT						8019
1 Set	No. 31 Bowl, 13 3/8” & 11 3/4” Casing	2708	2533		2548XT						8020
XT - Indicates Extended Taper Bowls available as options. See page 16 for 49 1/2” HMB Bowls and Slips detail.

See the Rotary Equipment Data Table for 49 1/2" Bowls and Slips detail.

Pin Drive & Square Drive Bushings (17 1/2" - 27 1/2")

ORDERING INFORMATION - DASH NUMBER
COMPLETE ASSY. PART #				NATL/ABCO			OILWELL								GARDNER-DENVER			API			LTI		UNIT RIG
SPB	SMB	SSB	SSD	17.5”	20.5”	27.5”	17.5”	A17.5”	A20.5”	21A	20.5”	26HD	A&B27.5”	27.5”	RT17.5”	22.5”	RT27.5”	17.5”	20.5”	27.5”		27.5”	17.5”	521A	27.5”
	3315-1	2501-1	2522-1	Yes
	3315-2	2501-2	2522-2				Yes
	3315-3	2501-3	2522-3
	3315-4	2501-4	2522-4					Yes							Yes			Yes
	3315-5	2501-5	2522-5
	3315-6	2501-6	2522-6
	3315-7	2501-7	2522-7																				Yes
	3315-8	2501-8	2522-8
2525-1	3309-1	2502-1	2523-1		Yes				Yes										Yes
2525-2	3309-2	2502-2	2523-2								Yes
2525-3	3309-3	2502-3	2523-3
2525-4	3309-4	2502-4	2523-4							Yes
2525-5	3309-5	2502-5	2523-5																					Yes
3325-1	3320-1	2503-1	2521-1
3325-2	3320-2	2503-2	2521-2
3325-3	3320-3	2503-3	2521-3													Yes
2526-1	3300-1	2504-1	2524-1			Yes
2526-2	3300-2	2504-2	2524-2										Yes				Yes			Yes
2526-3	3300-3	2504-3	2524-3											Yes
2526-4	3300-4	2504-4	2524-4
2526-5	3300-5	2504-5	2524-5
2526-6	3300-6	2504-6	2524-6																			Yes
2526-7	3300-7	2504-7	2524-7
2526-8	3300-8	2504-8	2524-8																						Yes
2526-9	3300-9	2504-9	2524-9

COMPLETE ASSY. PART #				EMSCO									IDECO
SPB	SMB	SSB	SSD	T1750	O17.5	P17.5	T2050	20.5J, JA, JAS, JC, JAC, JCS, JACS, PJL	T2750	27.5H	27.5K, KS, PJ	20.5JB, JAB, JABS, JBS	17.25”	17.5”	20.5”	23”	27.5”
	3315-1	2501-1	2522-1
	3315-2	2501-2	2522-2
	3315-3	2501-3	2522-3		Yes	Yes
	3315-4	2501-4	2522-4	Yes
	3315-5	2501-5	2522-5										Yes	Yes
	3315-6	2501-6	2522-6
	3315-7	2501-7	2522-7
	3315-8	2501-8	2522-8
2525-1	3309-1	2502-1	2523-1				Yes								Yes
2525-2	3309-2	2502-2	2523-2					Yes
2525-3	3309-3	2502-3	2523-3									Yes
2525-4	3309-4	2502-4	2523-4
2525-5	3309-5	2502-5	2523-5
3325-1	3320-1	2503-1	2521-1													Yes
3325-2	3320-2	2503-2	2521-2
3325-3	3320-3	2503-3	2521-3
2526-1	3300-1	2504-1	2524-1
2526-2	3300-2	2504-2	2524-2						Yes
2526-3	3300-3	2504-3	2524-3
2526-4	3300-4	2504-4	2524-4														Yes
2526-5	3300-5	2504-5	2524-5							Yes	Yes
2526-6	3300-6	2504-6	2524-6
2526-7	3300-7	2504-7	2524-7
2526-8	3300-8	2504-8	2524-8
2526-9	3300-9	2504-9	2524-9

*Use API Standard Bushing for RSB Series Tables