FEM standard crane drum

The FEM standard crane drum serves as an important component of the hoisting mechanism in European-style cranes. In addition, the European-style trolley drum eliminates the need for a dedicated bearing base, which is typically found in traditional crane drums. Instead, it integrates with the main and auxiliary end beams of the trolley frame, thus enabling it to support the load weight carried by the drum.

Types of FEM Standard Crane Drum

There are two types of drum sets: Cast drum set and Welded drum set.

The cast drum set, for instance, suits small-tonnage European-style cranes under 50 tons and we typically manufacture it from HT200 cast blanks. In contrast, the welded drum set is ideal for small, medium, and large-tonnage European-style cranes, and we typically make it from Q235-B and Q355-B steel plates rolled into shape. Compared to the cast drum set, these drums are relatively lightweight, which makes them suitable for single-piece production and large-size drums. However, drums made from Q355-B steel plates must undergo stress-relieving treatment before machining and heat treatment.

Features of the FEM Standard Crane Drum

For European-style trolleys, we recommend using a single-layer, double-grooved drum. Additionally, the design incorporates standard rope grooves, and we suggest using deep-groove drums for cranes with a lifting height exceeding 30 meters. The effective length of the rope groove primarily depends on the lifting weight, height, and lift ratio. For cranes with a larger lifting height, you can increase the drum diameter; however, you must ensure that the distance between the drum axis and the input shaft of the hoisting reducer allows enough space for the motor, brake, and other transmission parts. Furthermore, we can design series products based on product serialization, standardization, and modularization to optimize drum length and diameter.

The European-style drum set lacks supports and fixes directly to the main and auxiliary end beams of the trolley frame. As a result, we can only mount the overload limiter on the pulley shaft. The assembly consists of a drive shaft, through cover, bearings, bearing seat, spacer sleeve, drum coupling, end cover, drum, steel rope clamp, shaft positioning plate, bearing cover, height limiter transmission gear, clamp plate, connecting shaft, and more.

Small lifting capacity FEM Standard Crane Drum

1 — Drive shaft; 2, 7 — Through cover; 3, 13 — Bearing; 4 — Bearing seat; 5, 6 — Spacer sleeve; 8 — Drum coupling; 9 — End cover; 10 — Drum; 11 — Steel rope clamp; 12 — Right-end shaft positioning plate; 14 — Right-end bearing cover; 15 — Large gear of height limiter transmission; 16 — Right-end clamp plate; 17 — Right-end connecting shaft; 18 — Small gear of height limiter transmission; 19 — Right-end gear housing; 20 — Height limiter; 21 — Height limiter support; 22 — Height limiter cover.

Large lifting capacity FEM Standard Crane Drum

1 — Hoisting drive shaft; 2, 4, 8, 10, 11 — Through cover; 3, 9 — Self-aligning bearing; 5 — Drum coupling; 6 — Drum; 7 — Steel rope clamp; 12 — Height limiter.

Wall Thickness Selection for FEM Standard Crane Drum

We generally recommend that you initially determine the drum wall thickness based on experience and then check it for strength. Specifically, for drums with L≤3D, you should set the initial wall thickness to range from 0.95 to 1.05d. In contrast, for drums with L>3D, the initial wall thickness should fall between 1.1 and 1.2d. In this context, L represents the drum length, D represents the drum diameter, and d represents the diameter of the high-strength steel wire rope.

Groove Direction for FEM Standard Crane Drum Assembly

We categorize the drum assembly into left and right groove directions, which determine the order of rope winding, the side on which the rope is released, and where the rope head is fixed. Specifically, in the case of a double-groove, single-layer winding drum, you can fix the wire rope in two theoretical positions: one on the inner side of the drum and the other on the outer side.

FEM Standard Crane Drum—a

Drum diameter	Drawing No.	D1	D2	M	P	R	S	L	L1	L2	L3	d	d1	d2
φ285	T1001	285	291	120	11	169.5	73	1130	73	63	328	95	300	190
φ360	T1002	360	370	190	15	218	67	1360	91	79	328	105	320	210
Φ360	T1003	360	370	80	15	218	67	2230	91	79	328	105	320	210
Φ435	T1004	435	447	80	18	262	103	2160	103	77	388	125	380	380
Φ435	T1005	435	447	80	18	262	103	3070	103	77	388	125	380	380
Φ600	T1006	600	614	100	22	362	113	2970	113	91	537	155	410	410

FEM Standard Crane Drum—b

Drum diameter	Drawing No.	D1	D2	M	P	R	S	L	L1	L2	L3	d	d1	d2
φ285	T1001	285	291	120	11	169.5	73	1130	73	63	328	95	300	190
φ360	T1002	360	370	190	15	218	67	1360	91	79	328	105	320	210
Φ360	T1003	360	370	80	15	218	67	2230	91	79	328	105	320	210
Φ435	T1004	435	447	80	18	262	103	2160	103	77	388	125	380	380
Φ435	T1005	435	447	80	18	262	103	3070	103	77	388	125	380	380
Φ600	T1006	600	614	100	22	362	113	2970	113	91	537	155	410	410